BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Ab initio Green's functions approach for homogeneous nuclear matte r DTSTART;VALUE=DATE-TIME:20240528T155000Z DTEND;VALUE=DATE-TIME:20240528T161000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23914@indico.ific.uv.es DESCRIPTION:Speakers: Francesco Marino (Institut für Kernphysik\, Johanne s Gutenberg Universität\, Mainz\, Germany)\nIn this talk\, we will presen t our work at the interface between density functional theory (DFT) and *a b initio* theory. In particular\, we will focus on infinite nuclear matter \, that we simulate using a description based on a finite number of nucleo ns\, and discuss three research directions [1]:\n1. a new *ab initio* Self -consistent Green's function (SCGF) approach\, based on the algebraic diag rammatic construction (ADC) approximation scheme that has proved successfu l in finite nuclei\, is applied to determine the equation of state (EOS) o f nuclear matter using chiral interactions [2]\;\n2. we go beyond homogene ous matter\, and present results for nuclear matter perturbed by an extern al static potential\, the so-called static response problem [3]\, within t he DFT method [4] and\, at a preliminary level\, within Quantum Monte Carl o\;\n3. finally\, we present our program aimed at the construction of *ab initio*-based energy density functionals (EDFs) [1\,5]\, and discuss how t he static response offers in principle the possibility to gain information on the surface terms of the EDF *ab initio*.\n\nReferences:\n[1] F. Marin o\, PhD thesis\, University of Milano (2023)\n[2] C. Barbieri and A. Carbo ne\, Lect. Notes Phys. 936\, 571 (2017)\n[3] M. Buraczynski et al.\, Physi cs Letters B 818\, 136347 (2021)\n[4] F. Marino et al.\, Phys. Rev C. 107\ , 044311 (2023)\n[5] F. Marino et al.\, Phys. Rev. C 104\, 024315 (2021)\n \nhttps://indico.ific.uv.es/event/7332/contributions/23914/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23914/ END:VEVENT BEGIN:VEVENT SUMMARY:In-beam gamma-ray spectroscopy and lifetimes of excited states of 79Cu DTSTART;VALUE=DATE-TIME:20240528T163000Z DTEND;VALUE=DATE-TIME:20240528T165000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23900@indico.ific.uv.es DESCRIPTION:Speakers: Serge Franchoo (IJC & University Paris-Saclay)\nIn-b eam γ-ray spectroscopy of 79Cu was carried out at the Radioactive Isotope Beam Factory of the Riken laboratory during the 2021 Hicari campaign [1]. In-flight fission of 238U at 345 MeV/nucleon produced a wide range of exo tic nuclei\, including 80Zn. These nuclei were sent through the Bigrips se parator onto a beryllium target\, where knock-out reactions took place. Th e emitted γ-rays were detected by an array of germanium detectors positio ned around the target\, whilst the outcoming fragments were identified in the Zerodegree separator. Among these fragments\, our interest was focusse d on 79Cu\, which contains one proton more than doubly-magic 78Ni. To the extent that the magicity of 78Ni is maintained\, the γ-spectra of 79Cu a re expected to relate to the single-particle transitions of the last proto n [2]. Based on the comparison of the shapes of the energy peaks with simu lations\, the experiment specifically aimed at the determination of the li fetimes of the de-exciting states\, the first results of which show the pr esence of both collective and single-particle structures at low energy in 79Cu.\n\n1. K. Wimmer et al. \, Hicari: High-resolution Cluster Array at R IBF\, Riken Accel. Prog. Rep. 54\, S27 (2021)\n2. L. Olivier et al.\, Phys ical Review Letters 119\, 192501 (2017)\n\nhttps://indico.ific.uv.es/event /7332/contributions/23900/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23900/ END:VEVENT BEGIN:VEVENT SUMMARY:Spin dynamics of triaxial nuclei with a quasiparticle alignment DTSTART;VALUE=DATE-TIME:20240527T105000Z DTEND;VALUE=DATE-TIME:20240527T111000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23899@indico.ific.uv.es DESCRIPTION:Speakers: Radu Budaca (Horia Hulubei National Institute for R& D in Physics and Nuclear Engineering)\nThe dynamics of nuclei with a triax ial core and a non-axial rigid quasiparticle alignment is described in a s emiclassical setting [1\,2]. This includes the investigation of the spin d ependence of the stationary points and the derivation of the existence con ditions for distinct dynamical phases. Additionally\, an intuitive visuali zation of the classical orbits is used to show the classical motion of the total angular momentum vector. Quantum observables to be compared with ex perimental data\, are extracted from a Schrödinger equation constructed f rom the classical picture\, retaining thus a connection to the classical p henomenology. The use of the total angular momentum projection as a contin uous variable and the separation of the potential energy allows the interp retation of the spectra in terms of anharmonic wobbling oscillations and t ilted axis rotations. Therefore\, the concept of wobbling is expanded to n on-axial alignments [3] as well as to higher spins by the consistent inclu sion of the anharmonicities [4\,5]. The experimental realization of the mo del is presented for the $h_{11/2}$ quasiparticle bands of 105Pd\, 133La a nd 135Pr nuclei. Numerical applications also provided a new understanding for the dynamics of the 133La nucleus\, which exhibits a novel tilted-axis wobbling mode [3].\n\n[1] R. Budaca\, Phys. Rev. C 97\, 024302 (2018).\n[ 2] R. Budaca\, Phys. Rev. C 103\, 044312 (2021).\n[3] R. Budaca\, A. I. Bu daca\, J. Phys. G: Nucl. Part. Phys. 50\, 125101 (2023).\n[4] B. F. Lv et al.\, Phys. Rev. C 105\, 034302 (2022).\n[5] R. Budaca\, C. M. Petrache\, Phys. Rev. C 106\, 014313 (2022).\n\nhttps://indico.ific.uv.es/event/7332/ contributions/23899/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23899/ END:VEVENT BEGIN:VEVENT SUMMARY:Physics opportunities with relativistic rare ion beams at R3B/FAIR DTSTART;VALUE=DATE-TIME:20240527T083500Z DTEND;VALUE=DATE-TIME:20240527T090000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23832@indico.ific.uv.es DESCRIPTION:Speakers: Dolores Cortina Gil (Centro Superior de Investigacio nes Científicas)\nR3B is a scientific collaboration of FAIR working towar ds the realization of an apparatus\, located at the end of the High-Energy Branch of this facility\, that will receive exotic isotopes of any chemic al element from Hydrogen up to Uranium moving at energies around 1 A GeV. R3B will allow us to explore the limits of the nuclear shell model\, to st udy exotic (barionic and strange) nuclear matter and to reproduce in the l aboratory some relevant astrophysical scenarios as neutron stars.\n\nIn th is talk\, we will present the state of progress of the project and give a comprehensive overview of the planned research programme. Preliminary resu lts from the Phase-0 experiments will also be discussed.\n\nhttps://indico .ific.uv.es/event/7332/contributions/23832/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23832/ END:VEVENT BEGIN:VEVENT SUMMARY:Lifetime measurements in the N=126 region with the reversed plunge r configuration DTSTART;VALUE=DATE-TIME:20240531T103000Z DTEND;VALUE=DATE-TIME:20240531T105000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23827@indico.ific.uv.es DESCRIPTION:Speakers: Julgen Pellumaj (INFN-Mi\, INFN-LNL)\nA novel techni que has been developed to measure lifetimes of heavy neutron-rich nuclei\, namely 'the reversed plunger'. In heavy neutron-rich nuclei\, information on the lifetimes of low-lying excited states is scarce since these nuclei are difficult to populate. Among different reaction mechanisms\, multi-nu cleon transfer reactions have shown to be the perfect tool to explore such regions. Therefore\, profiting from the kinematics of such reactions and the plunger device in the reversed configuration\, lifetimes of excited nu clear states of the order of picoseconds can be measured.\nThis technique was employed for the first time at Laboratori Nazionali di Legnaro to meas ure lifetimes of low-lying excited states of nuclei with a mass of around 190\, where shape transitions from prolate to oblate are expected to occur along different isotopic chains while approaching the N=126 shell closure .\nA beam of $^{136}$Xe with the energy of 1134~MeV passed through a degra der foil of $^{93}$Nb with a thickness of 3.2~mg/cm$^{2}$ and impinged int o a $^{198}$Pt target 1.4~mg/cm$^{2}$ thick. Beam-like fragments entered t he PRISMA spectrometer where they were identified in mass\, atomic number\ , and velocity\, while the target-like fragments (the heavy nuclei of inte rest) traveled towards the degrader foil where they were stopped. Gamma ra ys were measured with the AGATA tracking array composed of 33 segmented HP Ge detectors. Among the nuclei populated in this experiment is $^{198}$Pt\ , for which the lifetimes of the low-lying excited states are known\, and can be used as a benchmark to validate the use of the proposed technique. \nThis work reports the lifetimes of the 2$^{+}_{1}$\, 2$^{+}_{2}$ and the 4$^{+}$ states of $^{198}$Pt measured with the reversed plunger configura tion\, employing the standard analysis procedures: the Decay Curve Method and the Differential Decay Curve Method. The agreement of our results with the literature data demonstrates the capability of this technique to furt her investigate the nuclear structure of heavy neutron-rich nuclei.\n\nhtt ps://indico.ific.uv.es/event/7332/contributions/23827/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23827/ END:VEVENT BEGIN:VEVENT SUMMARY:Exotic Decays of Extremely Proton-rich Nuclei in sd-shell and Rela ted Topics DTSTART;VALUE=DATE-TIME:20240527T164000Z DTEND;VALUE=DATE-TIME:20240527T170000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23828@indico.ific.uv.es DESCRIPTION:Speakers: Chengjian Lin ()\nIn the past ten years\, a series o f experiments have been done at the HIRFL-RIBLL1 facility for studying the exotic decays of extremely proton-rich nuclei in sd-shell. Beta-delayed p roton and two-proton decays from 20\;21Mg\, 22\;23Al\, 22\;23\;24Si\, 26\; 27P\, 27\;28\;29S have been measured by the continuous implantation-decay method using silicon array combined with gamma-ray detectors [1]. With hig h detection efficiency\, low energy threshold and good statistics\, a grea t number of new decays have been observed and rich information on the - decay spectroscopy (e.g. half-life\, decay energy\, branching ratio\, etc. ) has been obtained. Some interesting results related topics will be addre ssed\, including: 1) the beta-delayed two-proton decay of 22Si as well as its mass[2]\, and large isospin asymmetry in 22Si/22O mirror Gamow-Teller transitions [3]\; 2) the branching ratios of proton and gamma decays from the low-lying excited state of 27P and 26Si [4\,5]\, as well as astrophysi cal reaction rates of 26Si(p\,) [6] and 25Al(p\, )[5] related to the abundance issue of 26Al in the Milky Way\, 3) strongly isospin-mixed doub let in 26Si observed in beta-delayed two-proton decay of 26P [7]\, and so on. More details will be presented in the conference.\n\nReferences\n[1] L .J. Sun et al.\, Nucl. Instrum. Methods Phys. Res. A 804\, 1-7 (2015).\n[2 ] X.X. Xu et al.\, Phys. Lett. B 766\, 312-316 (2017).\n[3] J. Lee et al.\ , Phys. Rev. Lett. 125\, 192503 (2020).\n[4] L.J. Sun et al.\, Phys. Rev. C 99\, 064312 (2019).\n[5] P.F. Liang et al.\, Phys. Rev. C 101\, 024305 ( 2020).\n[6] L.J. Sun et al.\, Phys. Lett. B 802\, 135213 (2020).\n[7] J.J. Liu et al.\, Phys. Rev. Lett. 129\, 242502 (2022).\n\nhttps://indico.ific .uv.es/event/7332/contributions/23828/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23828/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of multinucleon knockout reactions of exotic nuclei in the r egion of Nitrogen DTSTART;VALUE=DATE-TIME:20240528T173000Z DTEND;VALUE=DATE-TIME:20240528T190000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23110@indico.ific.uv.es DESCRIPTION:Speakers: Martina Feijoo Fontán (USC)\nSeveral works focused on light isotopes [1\,2\,3] have shown a reduction of the cross sections w ith respect to the theoretical predictions for single-nucleon knockout rea ctions. These studies have reached different conclusions regarding the dep endence of the reduction factor observed of the spectroscopic factor with respect to the N/Z of the projectile. The study of (p\,pX) knockout reacti ons with the R3B versatile setup is a golden opportunity since the inverse kinematics technique can be used for kinematically complete measurements. \n\nOf particular interest is the systematic study of the probability of c luster formation. The successful experiments on stable Sn isotopes [4] ind icating the pre-existence of alpha clusters\, which are compatible with th eoretical predictions [5]\, have aroused the interest to study this phenom enon also for other clusters such as d\, t or 3He.\n\nThis presentation wi ll be focused on deuteron formation and its possible identification with C ALIFA [6]. One of the goals is to study the dependence of the cluster form ation probability with respect to the mass of the projectile. In addition\ , the occurrence of deuteron clusters embodies tensor force effects and sh ould be relevant for short-range correlations (SRC) [7]. \n\n[1] J. A. To stevin and A. Gade\, Phys. Rev. C 90\, 057602 (2014) \n[2] M. Gómez-Ramo s and A.M. Moro\, Phys. Lett. B 785\,511 (2018) \n[3] L. Atar et al.\, Ph ys. Rev. Lett. 120\, 052501 (2018) \n[4] J. Tanaka\, Z.H. Yang et al.\, S cience 371\, 260 (2021) \n[5] S. Typel\, Phys. Rev. C 89\, 064321 (2014)  \n[6] H. Alvarez-Pol\, Nucl. Instrum. Methods A 767\, 453-466 (2014) \n [7] M. Duer et al.\, Nature 560 620 (2018)\n\nhttps://indico.ific.uv.es/ev ent/7332/contributions/23110/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23110/ END:VEVENT BEGIN:VEVENT SUMMARY:First spectroscopic study of 51Ar by the (p\,2p) reaction DTSTART;VALUE=DATE-TIME:20240528T173000Z DTEND;VALUE=DATE-TIME:20240528T190000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23150@indico.ific.uv.es DESCRIPTION:Speakers: Marcell Juhász (HUN-REN Institute for Nuclear Resea rch)\nThe nuclear structure of 51Ar\, an uncharted territory so far\, was studied by the (p\,2p) reaction using γ-ray spectroscopy for the bound st ates and the invariant mass method for the unbound states. Two peaks were detected in the γ-ray spectrum and six peaks were observed in the 50Ar + n relative energy spectrum. Comparing the results to our shell-model calcu lations\, two bound and six unbound states were established. Three of the unbound states could only be placed tentatively due to the low number of c ounts in the relative energy spectrum of events associated with the decay through the first excited state of 50Ar. The low cross sections populatin g the two bound states of 51Ar could be interpreted as a clear signature f or the presence of significant subshell closures at neutron numbers 32 an d 34 in argon isotopes. It was also revealed that due to the two valence h oles\, unbound collective states coexist with individual-particle states i n 51Ar.\n\nhttps://indico.ific.uv.es/event/7332/contributions/23150/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23150/ END:VEVENT BEGIN:VEVENT SUMMARY:Double-gamma decays of double-beta decay emitters: can they be mea sured? DTSTART;VALUE=DATE-TIME:20240531T105000Z DTEND;VALUE=DATE-TIME:20240531T111000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23819@indico.ific.uv.es DESCRIPTION:Speakers: Javier Menéndez ()\nRecently\, some theoretical nuc lear structure works have pointed out the relation between the nuclear mat rix elements of neutrinoless double-beta decay\, a much sought-after nucle ar decay that emits two matter particles without antimatter [1\,2]\, and t he corresponding matrix elements of double-gamma decay from the double iso baric analog states (DIAS) of the initial double-beta decay nuclei [3\,4]. However\, the DIAS appear at high excitation energies\, and their double- gamma decay competes with faster decay channels such as particle emission or single-gamma decay\, making their measurement very challenging.\n\nIn t his talk I will present recent results [5] comparing the width of the doub le-gamma decay of DIAS of double-beta emitters and these competing channel s\, focusing on the lightest Ti48 but also covering heavier nuclei. Our pr eliminary results support the feasibility of measurements of double-gamma decay of DIAS\, which can provide very previous insights on the nuclear ma trix elements of neutrinoless double-beta decay.\n\n[1] M. Agostini\, G. B enato\, J. Detwiler\, J. Menéndez\, and F. Vissani\, Rev. Mod. Phys. 95 0 25002 (2023)\n[2] J. J. Gómez-Cadenas\, J. Martı́n-Albo\, J. Menéndez\ , M. Mezzetto\, F. Monrabal\, and\nM. Sorel\, Riv. Nuovo Cim. 46 619 (2023 )\n[3] B. Romeo\, J. Menéndez\, and C. Peña-Garay\, Phys. Lett. B 827 13 6965 (2022)\n[4] L. Jokiniemi and J. Menéndez\, Phys. Rev. C 107 044316 ( 2023)\n[5] B. Romeo\, D. Stramaccioni\, J. Menéndez and J.J. Valiente-Dob ón\, in preparation\n\nhttps://indico.ific.uv.es/event/7332/contributions /23819/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23819/ END:VEVENT BEGIN:VEVENT SUMMARY:Single-particle states in fp-shell nuclei through 50Ca(d\, p)51Ca transfer reaction. DTSTART;VALUE=DATE-TIME:20240528T080000Z DTEND;VALUE=DATE-TIME:20240528T082000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23820@indico.ific.uv.es DESCRIPTION:Speakers: Carlos Ferrera González (IEM CSIC)\nNeutron-rich Ca isotopes towards neutron number N = 34 are pivotal for exploring the evol ution of the fp-shell orbitals [1]. Beyond the N = 28 shell gap at 48Ca\, new magic numbers at N = 32 and 34 were established through spectroscopy o f low-lying states [2] and mass measurements [3]. Most recently\, the spat ial extension of the 1f7/2 and 2p3/2 neutron orbitals was determined via a one-neutron knockout reaction from 52Ca [4]\, while the single-particle 2p1/2 \, 1f5/2 and 1g9/2 orbitals defining the shell gaps at N = 32\, 34 remain to be established experimentally. The 50Ca(d\, p)51Ca transfer re action presents itself as well suited-method to access spectroscopic facto rs in the fp-shell\, where the angular distribution of the reaction produc ts allow for deduction of the angular momentum transfer.\n\nIn Decemeber o f 2022 the SHARAQ12 experiment was performed at the RIKEN Nishina Center\, aiming to study the single-particle structure of 51Ca via the (d\, p) rea ction using a 50Ca secondary beam. The secondary beam was produced at the BigRIPS separator and then degraded to approximately 15 MeV/nucleon at the OEDO [5] beamline. Beam-tracking has been performed with the recently dev eloped Strip-Readout PPAC detectors [6]\, recoiling protons coming from th e interaction of the beam with the secondary target of CD2 (260 μg/cm2) h ave been identified with the detector setup TINA2 [7]\, while the heavy re coils have been identified at the QQD SHARAQ spectrometer. In this contrib ution\, I will present the experiment\, current status of the analysis\, a nd the implications on the structure of neutron-rich Ca isotopes.\n\nhttps ://indico.ific.uv.es/event/7332/contributions/23820/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23820/ END:VEVENT BEGIN:VEVENT SUMMARY:Beta Decay Spectra Measurements for the Study of Reactors’ Antin eutrino Spectra. DTSTART;VALUE=DATE-TIME:20240530T133000Z DTEND;VALUE=DATE-TIME:20240530T135000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23817@indico.ific.uv.es DESCRIPTION:Speakers: G. A. Alcalá (Instituto de Física Corpuscular (IFI C)\, València\, Spain.)\nRecent predictions of reactors $\\bar{\\nu}$ spe ctra have revealed two irregularities: the Reactor Antineutrino Anomaly (R AA) and the spectral "bump" [1\,2\,3]. These predictions\, calculated with the Huber-Muller Conversion model [4\,5]\, have provoked several doubts a bout the integrity of experimental data and the accuracy of the models use d. In view of this\, improved measurements of nuclear data of relevant iso topes\, and the use of the Summation Calculation method [6] to determine r eactors $\\bar{\\nu}$ spectra\, present an alternative to the Conversion m odel. Calculations of reactors $\\bar{\\nu}$ spectra employing $\\beta$ fe edings from standard databases may suffer from the Pandemonium Effect\, wh ich can be mitigated by using the Total Absorption Gamma Spectroscopy (TAG S) technique [7].\n\nThe decays of a relatively small number of neutron ri ch fission products contribute the most to reactors $\\bar{\\nu}$ spectra within the regions where the effects of the RAA and the "bump" are stronge r [8]. Therefore\, to directly determine reliable energy distributions (or shapes) of these $\\beta$ decay spectra\, experimental campaigns have bee n performed at the IGISOL facility (Jyväskylä\, Finland) with newly deve loped telescope detectors. Several $\\beta$ decay spectra of utmost releva nce for the study of the RAA and the "bump" have been measured in the I233 (2022) and I233add (2023) experiments.\n\nThis presentation is dedicated to introduce the problem of the RAA and the "bump"\, and how the calculati ons of reactors $\\bar{\\nu}$ spectra are improved with the use of the Sum mation method and TAGS $\\beta$ feedings. Preliminary results of the analy sis of the data of the I233 experiment will be shown.\n\n[1] G. Mention et al.\, Physical Review D 83\, 073006 (2011).\n[2] J. H. Choi\, et al.\, Ph ysical Review Letters 116\, 211801. (2016).\n[3] F. P. An et al.\, Chinese Physics C 41\, 013002. (2017).\n[4] P. Huber\, Physical Review C 84\, 246 17 (2011)\; Physical Review C 85\, 029901 (2012).\n[5] T. A. Muller et al. \, Physical Review C - Nuclear Physics 83\, 054615 (2011).\n[6] M. Estienn e et al.\, Physical Review Letters 123\, 022502 (2019).\n[7] A. Algora et al.\, European Physical Journal A 57\, 85 (2021).\n[8] L. Hayen et al.\, P hysical Review C 100\, 054323 (2019).\n\nWe acknowledge the support from t he following projects: Prometeo Grant (CIPROM/2022/9)\, ASFAE Project (ASF AE/2022/027) and PID2022-138297NB-C21.\n\nhttps://indico.ific.uv.es/event/ 7332/contributions/23817/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23817/ END:VEVENT BEGIN:VEVENT SUMMARY:Influence of the tetraneutron on the EoS under core-collapse super nova and heavy-ion collision conditions DTSTART;VALUE=DATE-TIME:20240528T153000Z DTEND;VALUE=DATE-TIME:20240528T155000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23818@indico.ific.uv.es DESCRIPTION:Speakers: Helena Pais (University of Coimbra)\nLight (e.g. deu terons\, tritons\, helions\, α−particles)\, and heavy (pasta phases) nu clei exist in nature in core-collapse supernova matter and neutron star (N S) mergers\, where temperatures of the order of 50 to 100 MeV may be attai ned. In the NS inner crust\, that is under different conditions of tempera ture\, density and asymmetry\, these heavy clusters should also be present . The appearance of these clusters can modify the neutrino transport\, and \, therefore\, consequences on the dynamical evolution of supernovae and o n the cooling of proto-neutron stars are expected. However\, a correct est imation of their abundance implies that an in-medium modification of their binding energies is precisely derived. At such temperatures\, other exoti c degrees of freedom\, such as hyperons\, ∆−isobars\, or even resonant states of four neutrons\, may appear. Recently\, such a resonant state of four neutrons (tetraneutron) with an energy of E4n = 2.37±0.38(stat) ± 0.44(sys) MeV and a width of Γ = 1.75±0.22(stat) ± 0.30(sys) MeV was re ported. In this work\, we analyze the effect of including such an exotic s tate on the yields of other light clusters. We use a relativistic mean-fie ld (RMF) formalism\, where we consider in-medium effects in a two-fold way – that is\, via the couplings of the clusters to the mesons\, and via a binding energy shift – to compute the low-density equation of state (Eo S) for nuclear matter at finite temperature and fixed proton fraction. We consider five light clusters – namely deuterons\, tritons\, helions\, α −particles\, and 6He – immersed in a gas of protons and neutrons\, and we calculate their abundances and chemical equilibrium constants with and without the tetraneutron. We also analyze how the associated energy of th e tetraneutron would influence such results. We find that the low-temperat ure\, neutron-rich systems are the ones most affected by the presence of t he tetraneutron\, making NSs excellent environments for their formation. M oreover\, its presence in strongly asymmetric matter may increase the prot on and α−particle fractions considerably. This may have an influence on the dissolution of the accretion disk of the merger of two NSs.\n\nhttps: //indico.ific.uv.es/event/7332/contributions/23818/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23818/ END:VEVENT BEGIN:VEVENT SUMMARY:γ-spectroscopy combining isotopically identified fragments and hi gh fold γ-rays in Nb isotopes - first observation of 1 and 2 phonon γ-vi brational bands in odd-odd nucleus DTSTART;VALUE=DATE-TIME:20240530T130000Z DTEND;VALUE=DATE-TIME:20240530T133000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23797@indico.ific.uv.es DESCRIPTION:Speakers: Enhong Wang (Shandong University)\nThe nuclear struc ture of neutron-rich nuclei around A ∼ 100 shows shape transitions and l arge deformations. Among others\, these include ellipsoidal oscillation o f the shape (γ-vibrations). One-phonon γ-bands are observed in numerous deformed nuclei\, however\, observations of two or higher-order phonon γ -bands are rare. While the even-Z nuclei have been well investigated\, the spectroscopy of odd-odd nuclei in this region can provide deeper insights into our understanding. As part of a study of the evolution of the struct ure of even-odd and odd-odd neutron-rich Nb isotopes\, the structure of 10 4Nb was investigated in detail. The Nb nuclei were populated in fission re actions and measured using gamma-ray spectroscopy in two complementary way s using a) isotopically identified fragment produced in beam fusion and tr ansfer induced fission in the 238U+9Be system using the VAMOS++ and the AG ATA spectrometer and b) high statistics γ-γ-γ and γ-γ-γ-γ fold data from the spontaneous fission of 252Cf using GAMMASPHERE. The talk will di scuss the complementarity of the two methods necessary for studying neutro n-rich nuclei at high spin\, especially for odd-odd nuclei. The data are t hen systematically compared with neighboring multi-phonon γ-vibrational b ands to address the interesting observation for the first time of multi-ph onon vibrational bands in 104Nb.\n\nhttps://indico.ific.uv.es/event/7332/c ontributions/23797/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23797/ END:VEVENT BEGIN:VEVENT SUMMARY:TAGS measurements at GANIL with STARS DTSTART;VALUE=DATE-TIME:20240530T135000Z DTEND;VALUE=DATE-TIME:20240530T141000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23799@indico.ific.uv.es DESCRIPTION:Speakers: Sonja Orrigo (IFIC (CSIC-UV))\nConventional high-res olution techniques for $\\beta$-decay spectroscopy utilize high-purity ger manium detectors to measure individual $\\gamma$ rays emitted after $\\bet a$ decay. However\, this kind of measurement is affected by the Pandemoniu m systematic error [1]\, resulting in many high-energy $\\gamma$ rays and a significant portion of the $\\beta$ strength being missed. The Total Abs orption $\\gamma$-ray Spectroscopy (TAGS) technique effectively addresses this issue [2\, 3]. This method relies on the detection of the full energy of $\\gamma$ cascades following the decay\, achieved through the use of l arge scintillation crystals with high efficiency that act like calorimeter s. The TAGS technique allows for a precise determination of the $\\beta$ s trength free of Pandemonium. This is a fundamental quantity that depends o n the underlying nuclear structure\, making it the ideal tool for providin g constraints on theoretical models. The technique has been successfully u tilized for many years\, yielding important results relevant to nuclear st ructure\, nuclear astrophysics\, and applications in reactor and neutrino physics (see Ref. [3] for a recent review).\n\nCurrently\, a new-concept h ybrid spectrometer\, STARS\, is under development within the framework of the (NA)$^{2}$STARS project [4]. STARS will be the first device in the wor ld to combine the large $\\gamma$ efficiency typical of TAGS calorimeters with the excellent energy resolution and timing of LaBr$_{3}$(Ce) crystals . This unique combination\, along with increased segmentation\, will enabl e unprecedented studies further away from nuclear stability\, covering a b road range of physics cases and with prospects for use at many internation al facilities. In particular\, our first proposal has already been approve d at GANIL: Experiment E891_23 [5]\, which will be the pioneering measurem ent performed with STARS. The goal of E891_23 is to measure the $\\beta$-d ecay properties of several proton-rich nuclei in the Cr-Zn region\, of gre at interest for nuclear structure (to study isospin symmetry free of Pande monium in selected Tz=-2 nuclei [6\, 7]) and nuclear astrophysics (to cons train reaction rates of interest for the $^{44}$Ti nucleosynthesis).\n\n[1 ] J.C. Hardy et al.\, Phys. Lett. B 71\, 307 (1977).\n\n[2] B. Rubio et al .\, J. Phys. G Nucl. Part. Phys. 31\, S1477 (2005).\n\n[3] A. Algora et al .\, Eur. Phys. J. A 57\, 85 (2021).\n\n[4] Project (NA)$^{2}$STARS: “Neu trinos\, Applications and Nuclear Astrophysics with a Segmented Total Abso rption with a higher Resolution Spectrometer” (spokesperson: M. Fallot)\ , endorsed by the GANIL Scientific Council\, Jan. 2023.\n\n[5] Experiment E891_23: “Total Absorption Spectroscopy for Nuclear Structure and Nuclea r Astrophysics” (spokespersons: M. Fallot\, S.E.A. Orrigo\, A.M. Sánche z Benítez)\, approved by the GANIL Program Advisory Committee\, Nov. 2023 .\n\n[6] S.E.A. Orrigo et al.\, Phys. Rev. Lett. 112\, 222501 (2014). \n\n [7] S.E.A. Orrigo et al.\, Phys. Rev. C 93\, 044336 (2016).\n\nhttps://ind ico.ific.uv.es/event/7332/contributions/23799/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23799/ END:VEVENT BEGIN:VEVENT SUMMARY:The study of 20Ne(p\,γ)21Na and 21Ne(p\,γ)22Na reactions at LUNA DTSTART;VALUE=DATE-TIME:20240528T151000Z DTEND;VALUE=DATE-TIME:20240528T153000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23798@indico.ific.uv.es DESCRIPTION:Speakers: Sandra Zavatarelli (INFN - Genova)\, Antonio Caciol li (Universita' di Padova and INFN)\, Francesca Cavanna (INFN - Sezione di Torino)\, Eliana Masha (Helmholtz-Zentrum Dresden-Rossendorf)\, Ragande ep Singh Sidhu (SUPA\, School of Physics and Astronomy\, University of Edi nburgh)\nAmong the hydrogen burning processes in stars\, proton reactions with Ne isotopes are very relevant to constrain the production and abundan ces of neon and sodium isotopes in massive stars\, novae and supernovae. I n particular the 20Ne(p\,γ)21Na reaction is the first and slowest reactio n of the NeNa cycle and it controls the speed at which the entire cycle pr oceeds: its rate affects the synthesis of all the elements in the cycle. In the temperature range from 0.1 GK to 1 GK\, it is dominated by the Ep= 386 keV resonance and by the direct capture component. On the other hand\ , The 21Ne(p\,γ)22Na reaction has a relevant role in the production of th e radioactive isotope 22Na in novae and supernovae. At T~0.1-0.7GK\, the m ain contributions to the stellar rate are provided by several resonances ( Ep=126\, 271\, 272\, 290 and 352 keV). Both reactions have been recently s tudied at LUNA (Laboratory for Underground Nuclear Astrophysics) using the intense proton beam delivered by the LUNA 400 kV accelerator and a window less differential-pumping gas target coupled with two high-purity germaniu m detectors. New resonance strengths and branching ratios have been determ ined for all the resonances of interest and several new transitions observ ed for 22Na excited states. The contribution is aimed to summarize the new results and to highlight their impact on Ne-Na cycle.\n\nhttps://indico.i fic.uv.es/event/7332/contributions/23798/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23798/ END:VEVENT BEGIN:VEVENT SUMMARY:New half-lives measurements for r-process in A∼225 Po-Fr nuclei DTSTART;VALUE=DATE-TIME:20240527T153000Z DTEND;VALUE=DATE-TIME:20240527T160000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23796@indico.ific.uv.es DESCRIPTION:Speakers: Giovanna Benzoni (INFN-Milano)\nThe astrophysical ra pid-neutron capture process (r-process) of explosive nucleosynthesis is re sponsible\nfor the formation of half of the heavy nuclei above Fe. Actinid es are produced towards\nthe end of this process\, when the neutron flux i s expected to be minimal\, and it is supported also\nby fission processes. Given that the r-process path runs far away from the accessible species\, in\nthis heavy region of the chart of nuclides\, experimental inputs on $ \\beta$ decay for nuclei beyond N=126\nare particularly useful to test pre dictions of global nuclear models.\nIn this paper results from a recent ex periment performed at GSI-FAIR (Darmstadt\, Germany)\nwithin the HISPEC-DE SPEC experimental campaign\, as part of the FAIR Phase-0 program\, will\nb e discussed. The experiment populated 220$\n\nhttps://indico.ific.uv.es/ev ent/7332/contributions/23796/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23796/ END:VEVENT BEGIN:VEVENT SUMMARY:Some aspects of the structure of neutron-rich F isotopes in the Pa rticle-Rotor Model DTSTART;VALUE=DATE-TIME:20240531T083000Z DTEND;VALUE=DATE-TIME:20240531T090000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23795@indico.ific.uv.es DESCRIPTION:Speakers: Augusto O. Macchiavelli (Physics Division. Oak Ridg e National Laboratory)\nIn this talk\, we will discuss some aspects of the structure of neutron-rich F nuclei within the framework of the particle p lus rotor model. Specifically\, the low-lying structure of 25\,27\,29F can be understood in the rotation-aligned coupling scheme with their 5/2+ gro und states as the bandhead of a decoupled band [1\,2].\nThe excitation ene rgies of the 1/2+ and 9/2+ states correlate strongly with the rotational e nergy of the effective core\, seen by the odd proton\, and allow us to est imate its 2+ energy. The Nilsson plus PRM picture suggests that the extra proton\, with a dominant component in the down-sloping [220] 1⁄2 level p olarizes the Oxygens and stabilizes its dynamic deformation. Thus\, the ef fective cores could be interpreted as slightly deformed rotors with a mode st e2 ≈ 0.15\, as compared to the weak vibrational quadrupole collectivi ty in the real Oxygens.\nRelevant to this interpretation are the recent st udies of the 25F(p\,2p) 24O and 25F(-1n KO)24O reactions carried out at RI BF/RIKEN [3] and NSCL/MSU [4] respectively. Derived spectroscopic factors suggest that the effective core of 25F significantly differs from a free 2 4O nucleus. The observed fragmentation of the πd5/2 single-particle stren gth agrees with the PRM calculations and arises from the effects of deform ation and core overlap.\nWe will also present results of the two-particles plus rotor model for odd-odd 28F [5] and 30F [6] and discuss further expe riments that can shed further light on the validity of our interpretation. \n\n*This material is based upon work supported by the U.S. DOE\, Office o f Science\, Office of Nuclear Physics\, under Contract No. DE-AC05-00OR227 25\n\n[1] A.O. Macchiavelli\, H.L.Crawford\, P.Fallon\, et al. \, Phys. Le tt. B775\,160(2017).\n[2] A.O. Macchiavelli\, R. M. Clark\, H. L.Crawford\ , et al.\, Phys. Rev. C102\, 041301(R) (2020).\n[3] T.L.Tang\, T.Uesaka\, S.Kawase\, et al. Phys. Rev. Lett. 124\, 212502 (2020).\n[4] H.L.Crawford\ , M.D.Jones\, A.O.Macchiavelli\, et al.\, Phys. Rev. C106 L061303 (2022).\ n[5] A. Rebel\, O. Sorlin\, F.M. Marques\, et al.\, Phys. Rev. Lett. 124\, 152502 (2020).\n[6] J. Kahlbow\, PhD Thesis\, Technische Universitat Darms tadt (2019).\n\nhttps://indico.ific.uv.es/event/7332/contributions/23795/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23795/ END:VEVENT BEGIN:VEVENT SUMMARY:Exploring the secrets of the atomic nucleus with the COLLAPS setup at CERN DTSTART;VALUE=DATE-TIME:20240527T133000Z DTEND;VALUE=DATE-TIME:20240527T140000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23794@indico.ific.uv.es DESCRIPTION:Speakers: Liss Vazquez Rodriguez (CERN)\nThe COLLAPS experimen t stands at the forefront of collinear laser spectroscopy\, a field dedica ted to the precise measurement of unique nuclear characteristics in short- lived and exotic radioactive nuclei. By analyzing hyperfine structures and isotope shifts\, it determines nuclear spins\, electromagnetic moments\, and charge radii.\n\nAt its core\, COLLAPS seeks to unravel the mysteries surrounding nuclear existence: the boundaries defining it\, the emergence of simple patterns within complex nuclear structures\, and the possibility of previously unknown structural forms in regions far from stability. To explore these questions\, the\nCOLLAPS collaboration employs highly precis e and sensitive laser spectroscopy techniques.\n\nThis presentation will i ntroduce the COLLAPS setup and highlight some of the most recent discoveri es and results from the experiment.\n\nhttps://indico.ific.uv.es/event/733 2/contributions/23794/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23794/ END:VEVENT BEGIN:VEVENT SUMMARY:PARIS Array – status\, first experiments and plans DTSTART;VALUE=DATE-TIME:20240530T073000Z DTEND;VALUE=DATE-TIME:20240530T080000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23791@indico.ific.uv.es DESCRIPTION:Speakers: Adam Maj (IFJ PAN Krakow)\nPARIS (Photon Array for studies with Radioactive Ion and Stable beams) is an international resear ch project with the aim of developing and building a novel 4π gamma-ray c alorimeter\, benefiting from recent advances in scintillator technology. I t is intended to play the role of an energy-spin spectrometer\, a calorime ter for high-energy photons and a medium-resolution gamma-detector. The de vice is composed of two shells: the scintillators of the most advanced tec hnology (LaBr3:Ce or CeBr3) for the inner volume offering simultaneously h igh efficiency\, excellent time resolution and relatively good energy reso lution in a large energy range\, and a more conventional scintillator (NaI ) for the outer shell. The array can be used in a stand-alone mode\, in co njunction with other detection systems\, like germanium arrays (e.g.\, AGA TA)\, particle detectors (e.g.\, MUGAST\, NEDA\, FAZIA\, ACTAR) or heavy-i on spectrometers (e.g.\, VAMOS\, PRISMA). It will be used in experiments w ith both intense stable and radioactive ion beams to study the structure o f atomic nuclei and new nuclear excitation modes as a function of angular momentum\, isospin\, and temperature\, as well as reaction dynamics. More details can be found on the PARIS web page http://paris.ifj.edu.pl.\n\nIn the talk the concept and status of the PARIS project will be presented\, a s well as selected the results from the first experiments with PARIS in GA NIL Caen (France)\, IJCLab Orsay (France) and IFJ PAN Krakow (Poland) will be shown. In addition\, the outlook of the project as well as the ideas f or next experiments\, among others with AGATA in LNL Legnaro\, will be dis cussed.\n\nhttps://indico.ific.uv.es/event/7332/contributions/23791/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23791/ END:VEVENT BEGIN:VEVENT SUMMARY:Reactions in three- and four-body nuclear and hypernuclear systems DTSTART;VALUE=DATE-TIME:20240529T110900Z DTEND;VALUE=DATE-TIME:20240529T112900Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23142@indico.ific.uv.es DESCRIPTION:Speakers: Arnoldas Deltuva (Vilnius U)\nA rigorous few-body sc attering theory as proposed by Faddeev and extended by Yakubovsky and Alt\ , Grassberger and Sandhas is implemented in the momentum-space framework. Past applications include the nucleon-deuteron scattering\, three-cluster nuclear reactions\, and four-nucleon scattering. Recent and ongoing exten sions of this framework will be presented. \nFirst\, we made a two-fold ex tension of the standard dynamics by developing a new nonlocal form of opti cal potentials and simultaneously including the excitation of the nuclear core. Example results for nucleon transfer reactions (d\,p) and (p\,d) and deuteron inelastic scattering (d\,d')\n10Be and 24Mg nuclei demonstrate a good reproduction of the experimental data and an improved consistency be tween the two-body (elastic and inelastic nucleon-nucleus scattering) and three-body description [1\,2].\nSecond\, the four-nucleon scattering is ex tended to higher energies. Exact four-body calculations are compared with those based on microscopic optical potential with no-core shell model dens ities\, allowing to evaluate the the reliability of the optical potential method [3].\nThird\, reactions in hypernuclear three-body systems are desc ribed fully including the coupling between the nucleon-Lambda and nucleon- Sigma(+\,0\,-) states\, which a highly complicated problem with many thr esholds. Various elastic and inelastic cross sections are studied [4].\n\n 1. A. Deltuva\, D. Jurčiukonis\, Physics Letters B 840\, 137867 (2023).\ n 2. A. Deltuva\, D. Jurčiukonis\, Phys. Rev. C 107\, 064602 (2023).\n 3. A. Deltuva et al.\, in preparation.\n 4. A. Deltuva et al.\, in preparati on.\n\nhttps://indico.ific.uv.es/event/7332/contributions/23142/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23142/ END:VEVENT BEGIN:VEVENT SUMMARY:l-forbidden M1 transitions in semimagic nuclei DTSTART;VALUE=DATE-TIME:20240529T104900Z DTEND;VALUE=DATE-TIME:20240529T110900Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23101@indico.ific.uv.es DESCRIPTION:Speakers: Luis Mario Fraile (Universidad Complutense de Madrid )\nThe presence at low energy of pair of nuclear levels differing in orbit al angular momentum by two units\, which can be ascribed to single-particl e states in the shell model\, is common place in many odd-mass nuclei loca ted near closed shells. Such single-particle states can be labelled with t he radial quantum number n$_r$\, the orbital angular momentum $l$ and the total angular momentum $j$\, and would correspond to |n$_r$ l j=l+1/2> and |n$_r$–1 l+2 j´=l+3/2>\, respectively. The pairs s$_{1/2}$ – d$_{3/2 }$\, p$_{3/2}$ – f$_{5/2}$ and g$_{7/2}$ – d$_{5/2}$ are examples of s uch orbitals. They are experimentally observed as the ground state and low -lying first-excited state in many odd-A nuclei across the nuclear chart. \n\nSince the magnetic dipole isovector operator does not change the orbit al angular momentum\, magnetic dipole M1 $\\Delta$l=2 transitions between pairs of states of this kind are $l$-forbidden in the extreme shell model picture [1]. Nonetheless these transitions still occur\, although with rat es typically smaller than those of allowed transitions\, or even below the single-particle limit. Consequently\, it is anticipated that these trans itions arise from the breakdown of $l$-forbiddeness due to nuclear dynamic effects such as core polarization and meson exchange mechanisms [2]. Ther efore the investigation of $l$-forbidden M1 transitions may provide insigh t into the role of these effects within the atomic nucleus [3]. \n\nThis s tudy is a part of a systematic investigation of $l$-forbidden M1 transitio ns in semimagic nuclei\, making use of available data and our own experime ntal results. We focus on odd-A N=50 nuclei in the vicinity $^{78}$Ni [4] and neutron-rich odd-A Z=50 Sn isotopes [5\,6]. The experimental M1 transi tions probabilities are obtained from excited level lifetime measurements employing fast-timing methods. \n\nRegarding the N=50 isotopes new results will be presented for $^{83}$As and $^{85}$Br\, obtained from experiments performed at ISOLDE/CERN and ILL\, respectively. They will be discussed i n the context of other available data for the region. In the case of tin ( Z=50)\, the systematic study of $l$-forbidden transitions in several odd-m ass isotopes just below $^{132}$Sn will be presented.\n\n[1] I.M. Govil an d C.S. Kurana\, *Systematics of l-forbidden M1 transitions*\, Nuclear Phys ics 60 (1964) 666-671.\n[2] W. Andrejtscheff\, L. Zamick\, N.Z. Marupov et al.\, *Core polarization of l-forbidden M1 transitions in light nuclei*\, Nuclear Physics A 351 (1981) 54-62.\n[3] P. von Neumann-Cosel and J. N. G inocchio\, *l-forbidden M1 transitions and pseudospin symmetry*\, Phys. Re v. C 62 (2000) 014308.\n[4] V. Paziy\, L.M. Fraile\, H. Mach et al.\, *Fas t-timing study of $^{81}$Ga from the $\\beta$ decay of $^{81}$Zn*\, Phys. Rev. C 102 (2020) 014329.\n[5] R. Lica\, H. Mach\, L.M. Fraile\, et al.\, *Fast-timing study of the l-forbidden 1/2$^+$ $\\to$ 3/2$^+$ M1 transitio n in $^{129}$Sn*\, Phys. Rev. C 93 (2016) 044303.\n[6] J. Benito et al.\, submitted to Phys. Rev. C (2024).\n\nhttps://indico.ific.uv.es/event/7332/ contributions/23101/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23101/ END:VEVENT BEGIN:VEVENT SUMMARY:Coulomb barrier dynamics of nuclear haloes DTSTART;VALUE=DATE-TIME:20240529T102900Z DTEND;VALUE=DATE-TIME:20240529T104900Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23102@indico.ific.uv.es DESCRIPTION:Speakers: Ismael Martel (Univesity of Huelva)\nExotic light-nu clei with low particle separation energy can exhibit a very extended matte r distribution\, the so-called nuclear halo [1\, 2]. At collision energies around the Coulomb barrier\, the presence of a halo enhances the coupling between the elastic and reaction channels\, such as breakup\, transfer\, and fusion\, as compared to stable well-bound nuclei. The Coulomb barrier scattering of single-nucleon halo nuclei such as 8B (1p) and 15C (1n)\, or two-nucleon haloes such as 17Ne (2p) and 6He (2n)\, are particularly inte resting\, due to a complex interplay between nuclear and Coulomb forces an d valence nucleon correlations on the dynamical couplings [3\, 4\, 5\, 6]. In this contribution\, the characteristic features of low-energy dynamic s of nuclear haloes will be presented and discussed\, making particular em phasis of latest experimental results and its interpretation in terms of c oupled channel calculations. \n\n[1] I. Tanihata et al.\, Phys. Rev. Lett . 55\, 242676 (1985). \n[2] K. Riisager\, Phys. Scr. T152\, 014001 (2013). \n[3] J. Díaz-Ovejas et al.\, Phys. Lett. B \n[4] A.M. Sánchez-Benítez et al.\, Nucl. Phys. A803\, 30 (2008).\n[5] R. Sparté et al.\, Phys. Let t. B820\,136477(2021).\n[6] V. G. Távora et al.\, Phys. Lett. B\, submitt ed.\n\nhttps://indico.ific.uv.es/event/7332/contributions/23102/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23102/ END:VEVENT BEGIN:VEVENT SUMMARY:Isomeric states close to $^{78}$Ni studied via high-precision mass measurements DTSTART;VALUE=DATE-TIME:20240529T095900Z DTEND;VALUE=DATE-TIME:20240529T102900Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23780@indico.ific.uv.es DESCRIPTION:Speakers: Anu Kankainen (University of Jyväskylä)\nIsomers close to the doubly magic nucleus 78Ni (Z=28\, N=50) provide essential inf ormation on the shell evolution and shape coexistence far from stability. We have performed high-precision mass measurements of isomeric states clos e to 78Ni with the JYFLTRAP double Penning trap mass spectrometer [1] at t he Ion Guide Isotope Separator On-Line (IGISOL) facility. The existence of a long-lived isomeric state in 76Cu has been debated for a long time. We confirm the existence of such an isomeric state with an excitation energy Ex=64.8(25) keV [2]. Based on the ratio of detected ground- and isomeric-s tate ions as a function of time\, we show that the isomer is the shorter-l iving state previously considered as the ground state of 76Cu. In addition to 76Cu\, we measured the 1/2+ isomeric state of 79Zn. This isomer is kno wn to be strongly deformed [3]. We place it unambiguously at 942(10) keV\, slightly below the 5/2+ state at 983(3) keV. Using the state-of-the-art s hell-model calculations\, the 1/2+ isomer in 79Zn is interpreted as the ba ndhead of a low-lying deformed structure akin to a predicted low-lying def ormed band in 80Zn. The results show the importance of high-precision mass measurements as pinning down the excitation energies of long-living isome ric states and give support for shape coexistence in the 78Ni region. \n[1 ] T. Eronen et al.\, Eur. Phys. J. A 48\, 46 (2012). \n[2] L. Canete et al .\, Phys. Lett. B 853\, 138663 (2024). \n[3] X. F. Yang et al.\, Phys. Rev . Lett. 116\, 182502 (2016). \n[4] L. Nies\, L. Canete et al.\, Phys. Rev. Lett. 131\, 222503 (2023).\n\nhttps://indico.ific.uv.es/event/7332/contr ibutions/23780/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23780/ END:VEVENT BEGIN:VEVENT SUMMARY:Nuclear reactions in the framework of time-dependent density funct ional theory with pairing correlations DTSTART;VALUE=DATE-TIME:20240529T093000Z DTEND;VALUE=DATE-TIME:20240529T095900Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23779@indico.ific.uv.es DESCRIPTION:Speakers: P. Magierski (Warsaw University of Technology)\nSup erfluidity and superconductivity are remarkable manifestations of quantum coherence at a macroscopic scale. The existence of superfluidity has been experimentally confirmed in many condensed matter systems\, in He-3 and He -4 liquids\, in nuclear systems including nuclei and neutron stars\, in bo th fermionic and bosonic cold atoms in traps\, and it is also predicted to show up in dense quark matter. Pairing correlations in nuclear systems ar e one of the most important characteristics of non magic atomic nuclei. Va rious features related to high spin phenomena or to large amplitude collec tive motion\, e.g. fission\, indicate that these correlations are crucial for our understanding of nuclear structure and dynamics.\n\nThe time depen dent density functional theory (TDDFT) is\, to date\, the only microscopic method which allow to investigate fermionic superfluidity far from equili brium. In nuclear physics it offers a microscopic description of low energ y nuclear reactions\, where fermionic degrees of freedom and pairing field dynamics are explicitly taken into account. The local version of TDDFT is particularly well suited for leadership class computers of hybrid (CPU+GP U) architecture. Using the most powerful supercomputers we are currently a ble to study a real-time 3D dynamics without any symmetry restrictions evo lving up to hundred of thousands of superfluid fermions. It represents a t rue qualitative leap in quantum simulations of nonequilibrium systems\, al lowing to make quantitative predictions and to reach limits inaccessible i n laboratories.\n\nDuring the talk I will review several applications and results concerning nuclear collisions and induced fission\, discussing adv antages of this approach.\n\nhttps://indico.ific.uv.es/event/7332/contribu tions/23779/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23779/ END:VEVENT BEGIN:VEVENT SUMMARY:Electromagnetic dipole transitions in nuclei at finite temperature DTSTART;VALUE=DATE-TIME:20240530T084000Z DTEND;VALUE=DATE-TIME:20240530T090000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23084@indico.ific.uv.es DESCRIPTION:Speakers: Esra Yuksel (University of Surrey)\nDescribing the p roperties of highly excited nuclei or atomic nuclei at finite temperatures remains one of the most challenging tasks for both nuclear theory and exp eriment. Understanding the response of nuclei\, particularly electromagnet ic dipole transitions\, under extreme conditions is not only crucial for n uclear physics but also essential for modelling astrophysical phenomena su ch as stellar and galactic evolution [1].\nTo describe temperature effects in electromagnetic transitions\, we developed a self-consistent finite te mperature relativistic quasiparticle random phase approximation (FT-RQRPA) based on relativistic energy density functional with point coupling inter action [2-3]. We studied the electric dipole (E1) and magnetic dipole (M1) transitions at temperatures ranging from T=0 to 2 MeV for the calcium and tin isotopic chains. Our study revealed that the E1 and M1 responses exhi bit significant dependence on temperature. The E1 strength experiences sli ght modifications within the considered temperature range\, while new low- energy peaks emerge in the low-energy region due to thermal unblocking. Th e M1 strength also undergo significant shifts towards lower energies due t o the decrease in spin-orbit splitting energies and the weakening of the r esidual interaction with increasing temperature. At high temperatures\, we observed an intriguing phenomenon in 40\,60Ca nuclei: the emergence of M1 excitations. These excitations\, which are typically forbidden at zero te mperature due to fully occupied (or fully vacant) spin-orbit partner state s\, became apparent under these conditions. These findings could play a cr ucial role in modelling gamma strength functions and their applications in astrophysically relevant nuclear reaction studies.\n\n\n\n[1] M. Arnould\ , S. Goriely\, K. Takahashi\, Physics Reports\, 450\, 4–6\, (2007).\n[5] A. Kaur\, E. Yüksel\, and N. Paar\, Phys. Rev. C 109\, 014314 (2024).\n[ 6] A. Kaur\, E. Yüksel\, and N. Paar\, Phys. Rev. C 109\, 024305 (2024).\ n\nhttps://indico.ific.uv.es/event/7332/contributions/23084/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23084/ END:VEVENT BEGIN:VEVENT SUMMARY:Gamma and Fast-Timing spectroscopy in the $^{128}$Cd$\\rightarrow $$^{128}$In$\\rightarrow$$^{128}$Sn $\\beta$-decay chain DTSTART;VALUE=DATE-TIME:20240530T082000Z DTEND;VALUE=DATE-TIME:20240530T084000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23114@indico.ific.uv.es DESCRIPTION:Speakers: Marcos Llanos Expósito (UCM)\nThe isotopic chains c lose to the nuclei number $Z$=50 have motivated extensive experimental and theoretical efforts during the last decades. Their structure provide an e xcellent ground to study shell-evolution along the chain and to investigat e the interplay between single-particle and collective degrees of freedom. The systematic study of excited structure of nuclei in the double magic $ ^{132}$Sn region\, and specifically the measurement of excited-state lifet imes\, provides key observables to get a deeper insight on nuclear structu re. \n\n\nA new experimental camping was carried out at the ISOLDE facili ty to study the $\\beta$-decay of neutron-rich cadmium isotopes. High inte nsity Cd (Z=48) beams were produced after the fission of a thick UC$_{x}$ target\, selectively ionized by the ISOLDE Resonance Ionization Laser Ion Source (RILIS) and separated in mass using the General Purpose Separator ( GPS) ISOLDE mass separator. A temperature-controlled quartz transfer line was used to ensure purity of the cadmiun beams.\n\nIn this contribution re sults derived for the A=128 isobaric chain will be discussed [3-5]. Our ex periment exploited the excellent spectroscopic capabilities provided by th e ISOLDE Decay Station (IDS). The fast-timing configuration was employed\, which includes 6 highly efficient clover-type HPGe detectors\, altogether with two LaBr$_3$(Ce) and three ultrafast $\\beta$-plastic detectors arra nged in a close geometry. This configuration is well suited to measure lif etimes of excited states down to the 10 ps via ultra-fast timing methods [ 1\,2]. \n\n\n\nThe excited structure of $^{128}$In was populated via the $\\beta$-decay of the $^{128}$Cd 0$^{+}$ ground state. In the case of $^{1 28}$Sn\, the excited levels were selectively fed only by the $\\beta$-deca y of the precursor $^{128}$In (3)$^{+}$ ground state\, excluding the contr ibution of others $\\beta$-decaying states due to selection rules imposed by the parent $^{128}$Cd 0$^{+}$ state. In this contribution\, we will in form on the the expanded level-schemes for both $^{128}$In and $^{128}$Sn . Additionally\, we will report on the first direct measurements lifetime s below the nanosecond range in both nucleus. A discussion will be provid ed on the derived $B(XL)$ transition rates are discussed\, and particular ly on the lifetime of the first 4$^+$ stat in $^{128}$Sn and the derived $B(E2\;4^+\\to2^+)$.\n\nhttps://indico.ific.uv.es/event/7332/contributions /23114/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23114/ END:VEVENT BEGIN:VEVENT SUMMARY:Microscopic analysis of giant monopole resonance in nuclear isotop ic chains DTSTART;VALUE=DATE-TIME:20240530T080000Z DTEND;VALUE=DATE-TIME:20240530T082000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23071@indico.ific.uv.es DESCRIPTION:Speakers: Mitko Gaidarov (INRNE-BAS)\nA systematic study of th e isoscalar giant monopole resonance (ISGMR) in a variety of nuclear syste ms is performed within the microscopic self-consistent Skyrme HF+BCS metho d and coherent density fluctuation model. The calculations for the incompr essibility in finite nuclei are based on several energy density functional s for nuclear matter. This theoretical scheme is successfully proved\, for instance\, in calculations of the nuclear symmetry energy [1-3]\, as well as of the ratio of its surface to volume components [4\,5]. The good agre ement achieved between the calculated centroid energies of the ISGMR and t heir recent experimental values for various nuclei demonstrates the releva nce of the proposed theoretical approach [6]. The latter can be applied to analyses of neutron stars properties\, such as incompressibility\, symmet ry energy\, slope parameter\, and other astrophysical quantities.\n\n[1] M .K. Gaidarov\, A.N. Antonov\, P. Sarriguren\, E. Moya de Guerra\, Phys. Re v. C 84\, 034316 (2011).\n[2] M.K. Gaidarov\, A.N. Antonov\, P. Sarriguren \, E. Moya de Guerra\, Phys. Rev. C 85\, 064319 (2012).\n[3] I.C. Danchev\ , A.N. Antonov\, D.N. Kadrev\, M.K. Gaidarov\, P. Sarriguren\, E. Moya de Guerra\, Phys. Rev. C 101\, 064315 (2020).\n[4] M.K. Gaidarov\, E. Moya de Guerra\, A.N. Antonov\, I.C. Danchev\, P. Sarriguren\, D.N. Kadrev\, Phys . Rev. C 104\, 044312 (2021). \n[5] A.N. Antonov\, D.N. Kadrev\, M.K. Gaid arov\, P. Sarriguren\, E. Moya de Guerra\, Phys. Rev. C 98\, 054315 (2018) .\n[6] M.K. Gaidarov\, M.V. Ivanov\, Y.I. Katsarov\, A.N. Antonov\, Astron omy 2\, 1 (2023).\n\nhttps://indico.ific.uv.es/event/7332/contributions/23 071/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23071/ END:VEVENT BEGIN:VEVENT SUMMARY:Advancements in Gamma-ray Spectroscopy: Expanding Sensitivity and Experimental Capabilities DTSTART;VALUE=DATE-TIME:20240530T070000Z DTEND;VALUE=DATE-TIME:20240530T073000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23757@indico.ific.uv.es DESCRIPTION:Speakers: Daniele Mengoni (University and INFN - Padova)\nIn r ecent decades\, $\\gamma$-ray spectroscopy has experienced a significant t echnological advancement through the technique of $\\gamma$-ray tracking\, achieving a sensitivity almost two orders of magnitude greater than previ ous Compton-shielded arrays. This leap forward rivals the milestones achie ved since the beginning of $\\gamma$-ray spectroscopy. Combining $\\gamma$ -ray spectrometers with detectors recording complementary reaction product s\, such as light-charged particles for transfer reactions and scattered i ons for Coulomb excitation measurements\, further enhances sensitivity.\n\ nNucleon transfer reactions provide a valuable means to explore the energi es of shell model single-particle orbitals and study their energy migratio n away from stability. Additionally\, such measurements permit the estimat ion of cross sections relevant to stellar evolution and nucleosynthesis. C oincident $\\gamma$-ray and particle measurements offer insights into deca y channels for unbound systems\, crucial for astrophysics and nuclear stru cture near drip-lines.\n\nIn this contribution\, results and prospects for transfer-reaction experiments utilizing newly developed devices like GRIT and other detectors will be outlined\, paving the way for further advance ments in $\\gamma$-ray spectroscopy and nuclear structure studies.\n\nhttp s://indico.ific.uv.es/event/7332/contributions/23757/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23757/ END:VEVENT BEGIN:VEVENT SUMMARY:First Observation of New Isotopes at FRIB: What Comes Next? DTSTART;VALUE=DATE-TIME:20240531T111000Z DTEND;VALUE=DATE-TIME:20240531T113000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23103@indico.ific.uv.es DESCRIPTION:Speakers: Oleg B. Tarasov (FRIB / MSU)\nThe Facility for Rare Isotope Beams (FRIB) [1] is a US Department of Energy User facility provi ding primary\, heavy-ion beams with energies up to 300 MeV/u (typically 25 0 MeV/u for most mid-mass beams). Typical beam intensities are 500 pnA wit h plans to increase to 20\,000 pnA. This capability positions FRIB as a pi votal resource for accessing a broad spectrum of rare isotope beams. Herei n\, we present the first observations of new isotopes at FRIB\, achieved t hrough the interaction of a 198Pt beam with a carbon target at 186 MeV/u a nd a beam power of 1.5 kW\, which is equivalent to 41 pnA. This discovery\ , occurring within FRIB's inaugural year\, underscores its potential for research with beams of rare isotopes. We detail the particle identificatio n process for reaction products\, employing event-by-event analysis of ene rgy loss\, time of flight\, magnetic rigidity\, and total kinetic energy\, and compare these findings to those from the National Superconducting Cyc lotron Laboratory (NSCL) with a 198Pt beam at 85 MeV/u [3]. Moreover\, we discuss the efficacy of a multi-step reaction scheme for probing the neutr on-rich region\, highlighting the Abrasion-Ablation model's role in predic ting production cross sections for previously unobserved isotopes. This di scussion integrates the latest theoretical and experimental insights\, alo ngside computational advancements. The evolution of FRIB's capabilities\, marked by the transition to full intensity\, heralds a new era for the exp loration of rare isotopes\, promising significant contributions to nuclear physics.\nReferences:\n1. T. Glasmacher et al.\, Nuclear Physics News 27\ , 28 (2017).\n2. O.B. Tarasov et al.\, Phys. Rev. Lett. 132\, 072501 (2024 ).\n3. K. Haak et al.\, Phys. Rev. C 108\, 034608 (2023).\n\nhttps://indic o.ific.uv.es/event/7332/contributions/23103/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23103/ END:VEVENT BEGIN:VEVENT SUMMARY:Global properties of nuclei and drip lines at finite temperature DTSTART;VALUE=DATE-TIME:20240531T100000Z DTEND;VALUE=DATE-TIME:20240531T103000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23772@indico.ific.uv.es DESCRIPTION:Speakers: Nils Paar (Department of Physics\, Faculty of Scienc e\, University of Zagreb\, Bijenička c. 32\, 10000 Zagreb\, Croatia)\nIn stellar environments nuclei appear at finite temperatures\, becoming extre mely hot in core-collapse supernovae and neutron star mergers. However\, d ue to theoretical and computational complexity\, most model calculations o f nuclear properties are performed at zero temperature\, while those exist ing at finite temperatures are limited only to selected regions of the nuc lide chart. Recently a theoretical framework has been established for the description of properties of hot nuclei\, based on the relativistic nuclea r energy density functional (RNEDF) and finite temperature relativistic Ha rtree-Bogoliubov model supplemented by the continuum subtraction procedure . A variety of nuclear properties have been investigated\, including nucle ar binding energies\, neutron emission lifetimes\, quadrupole deformations \, neutron skin thickness\, proton and neutron pairing gaps\, entropy and excitation energy. At lower temperatures the nuclear landscape is influenc ed only moderately by the finite-temperature effects\, mainly by reducing the pairing correlations. As the temperature increases\, the effects on nu clear structure become more pronounced\, reducing both the deformations an d the shell effects. It is also important to understand where are the limi ts of nuclear binding in hot stellar environments. Recently the nuclear dr ip lines have been mapped at temperatures up to around 20 billion kelvins in the RNEDF framework including treatment of thermal scattering of nucleo ns in the continuum. With extensive computational effort\, the drip lines have been determined using several RNEDFs with different underlying intera ctions\, demonstrating considerable alterations of the neutron drip line w ith temperature increase\, especially near the magic numbers. At temperatu res less than around 12 billion kelvins\, the interplay between the proper ties of nuclear effective interaction\, pairing\, and temperature effects determines the nuclear binding. At higher temperatures\, surprizingly the total number of bound nuclei increases with temperature due to thermal she ll quenching effect. The nuclear drip lines for hot nuclei appearing in st ellar environments should be viewed as limits that change dynamically with temperature. Nuclear excitations and weak interaction processes also disp lay sensitivity on the finite temperature effects.\n\n[1] A. Ravlić\, E. Yüksel\, T. Nikšić\, N. Paar\, "Expanding the limits of nuclear stabili ty at finite temperature"\, Nature Communications 14\, 4834 (2023).\n[2] A . Ravlić\, E. Yüksel\, T. Nikšić\, N. Paar\, "Global properties of nuc lei at finite temperature within the covariant energy density functional t heory "\, Phys. Rev. C 109\, 014318 (2024).\n[3] A. Kaur\, E. Yüksel\, N. Paar\, “Finite-temperature effects in magnetic dipole transitions”\, Phys. Rev. C 109\, 024305 (2024).\n[4] A. Kaur\, E. Yüksel\, N. Paar\, “Electric dipole transitions in the relativistic quasiparticle random-ph ase approximation at finite temperature”\, Phys. Rev. C 109\, 014314 (20 24).\n\nhttps://indico.ific.uv.es/event/7332/contributions/23772/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23772/ END:VEVENT BEGIN:VEVENT SUMMARY:In-source laser spectroscopy @ ISOLDE: studies of shape coexistenc e and shape evolution across the lead region DTSTART;VALUE=DATE-TIME:20240531T093000Z DTEND;VALUE=DATE-TIME:20240531T100000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23771@indico.ific.uv.es DESCRIPTION:Speakers: James Cubiss (University of York\, UK)\nLaser spectr oscopy is a powerful tool for studying how structures of ground and isomer ic states evolve across the chart of nuclides [1]. By measuring isotope sh ifts and hyperfine structures we can deduce fundamental properties such as nuclear spins\, changes in mean-squared charge radii and electromagnetic moments\, all in a model-independent way. Such data are excellent tests fo r theory\, providing wide-ranging benchmarks to compare model predictions to [2].\n\nI will introduce the in-source resonance ionisation technique u sed at CERN’s ISOLDE facility [3] – a highly efficient method\, which when combined with the sensitivity of decay stations [4] or mass spectrome try devices [5]\, allows access to exotic nuclides with extremely low prod uction rates. Results will be presented from campaigns of experiments of i sotopes in the proton-rich Pb (Z=82) region\, a hot bed of nuclear structu re phenomena that produce striking changes in nuclear ground-state deforma tion. Highlights will be given from studies of the charge radii of gold an d bismuth isotopes\, along with accompanying Hartree-Fock-Bogoliubov calcu lations that attempt to describe the trends in radii throughout the region [6].\n\n[1] X. F. Yang\, S. J. Wang\, S. G. Wilkins\, R. F. Garcia Ruiz\, Prog. Part. Nucl. Phys. 129\, 104005 (2023). \n\n[2] A. R. Vernon et al.\ , Nature 607\, 260-265 (2022). \n\n[3] M. J. Borge\, B. Jonson\, J. Phys. G: Nucl. Part. Phys. 44\, 044011 (2017). \n\n[4] A. N. Andreyev et al.\, P hys. Rev. Lett. 105\, 252502 (2010). \n\n[5] R. N. Wolf et al.\, Int. J. M ass Spectrom. 349-350\, 123-133 (2013). \n\n[6] J. G. Cubiss et al.\, Phys . Rev. Lett. 131\, 202501 (2023).\n\nhttps://indico.ific.uv.es/event/7332/ contributions/23771/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23771/ END:VEVENT BEGIN:VEVENT SUMMARY:Prompt and delayed gamma-ray spectroscopy of neutron-rich Au isoto pes populated from multi-nucleon transfer reaction DTSTART;VALUE=DATE-TIME:20240531T080000Z DTEND;VALUE=DATE-TIME:20240531T083000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23765@indico.ific.uv.es DESCRIPTION:Speakers: Yung Hee KIM (Institute for Basic Science (IBS)\, Da ejeon\, Korea)\nThe investigation of neutron-rich nuclei situated below $^ {208}$Pb is anticipated to unveil a spectrum of phenomena\, from shape evo lution to the existence of exotic shapes and co-existence\, which manifest from nuclear interaction. Additionally\, nuclides' vicinity to the N=126 shell closure is linked to understanding the r-process path towards actini des. Although its importance is well recognized\, only limited knowledge o f the excited states is available\, restricting comprehensive understandin g. Despite the acknowledged importance of this realm\, our understanding r emains restricted primarily due to challenges in the production of such is otopes. Furthermore\, the available excited states of known isotopes are l imited to decay spectroscopy.\n\nTo address these limitations\, a novel ex periment was performed at GANIL aimed at exploring isotopes of interest vi a multi-nucleon transfer reactions between a 7 MeV/u $^{136}$Xe beam and a $^{198}$Pt target. The large acceptance VAMOS++ magnetic spectrometer and AGATA Ge tracking array were used to measure excited states of nuclides o f interest. Several new experimental techniques were implemented. First\, a new second arm ToF spectrometer was installed\, which is composed of a 1 .2 m long vacuum chamber and large area multi-wire proportional counter to measure the velocity vector of the target-like fragments. Second\, a four EXOGAM clover HPGe array was installed at the end of the second arm to me asure the delayed gamma rays from the excited states. Finally\, a new meth od to determine particle identification was developed using a machine lear ning algorithm\, where energy and charge states are determined using super vised machine learning\, and atomic numbers are determined by the unsuperv ised learning method.\n\nAmong the plethora of populated isotopes\, partic ular attention was devoted to the nuclear structure of odd-mass Au isotope s. The structure of Au isotopes has the longest chain of odd-mass isotopes with excited state information\; showcasing proton-hole states with nearl y constant energies across varying neutron numbers\, but the neutron-rich part of information is limited near the stable isotope $^{197}$Au. The pre liminary results of several neutron-rich Au isotopes\, such as their level structure\, will be presented.\n\nhttps://indico.ific.uv.es/event/7332/co ntributions/23765/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23765/ END:VEVENT BEGIN:VEVENT SUMMARY:LIFETIME MEASUREMENTS AFTER TRANSFER REACTIONS WITH AGATA AT LNL DTSTART;VALUE=DATE-TIME:20240531T073000Z DTEND;VALUE=DATE-TIME:20240531T080000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23781@indico.ific.uv.es DESCRIPTION:Speakers: Franco Galtarossa (INFN Sezione di Padova)\nThe life times of nuclear excited states are directly related to electromagnetic tr ansition probabilities\nand their determination has strong impacts on our understanding of nuclear structure and of a\nvariety of astrophysical scen arios.\nAt the Legnaro National Laboratories of INFN in the last 2 years a n extensive experimental\ncampaign has been carried out with the γ-ray tr acking array AGATA [1] coupled to the magnetic\nspectrometer PRISMA [2] an d other ancillary detectors\, such as Silicon arrays\, MCP detectors and\n scintillators [3]. In this configuration\, one-\, two- and multi-nucleon t ransfer reactions with beam\nenergies between 5 and 10 MeV/u have been lar gely exploited to populate moderately exotic nuclei\nalong the whole nucle ar chart. Following these reactions\, the lifetime of selected nuclear exc ited\nstates\, lying in a wide range between 1 fs to 100 ps\, has been mea sured with the Recoil Distance\nDoppler Shift method or the Dopper Shift A ttenuated Method.\nIn the talk I will present few selected cases from the last experimental campaigns and show the\npossibilities and performance of fered by the set-up\, together with some preliminary results. Possible\npe rspectives\, also in view of the future experimentation with the radioacti ve ion beams delivered by\nSPES [4]\, will be discussed.\n[1] S. Akkoyun e t al.\, Nucl. Instrum. Methods Phys. Res. A 668 (2012) 26-58.\n[3] A. M. S tefanini at al.\, Nucl. Phys. A 701 (2002) 217c-221c.\n[2] J. J. Valiente- Dobón et al.\, Nucl. Instrum. Methods Phys. Res.\, A 1049 (2023) 168040.\ n[4] https://www.lnl.infn.it/en/spes-2/\n\nhttps://indico.ific.uv.es/event /7332/contributions/23781/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23781/ END:VEVENT BEGIN:VEVENT SUMMARY:Nuclear structure with AGATA using post-accelerated radioactive be ams DTSTART;VALUE=DATE-TIME:20240531T070000Z DTEND;VALUE=DATE-TIME:20240531T073000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23762@indico.ific.uv.es DESCRIPTION:Speakers: Emmanuel Clement (CNRS-GANIL\, France)\nAGATA (Advan ced Gamma-ray Tracking Array\, www.agata.org) is the European forefront in strument for high-resolution γ-ray spectroscopy based on high-purity segm ented germanium detectors. Thanks to its fine segmentation\, digital data acquisition electronics and pulse-shape analysis techniques\, AGATA can tr ack the path of a gamma ray inside the spectrometer to reconstruct its emi ssion angle as well its full energy. This ensures an unprecedented combina tion of detection efficiency and resolving power. AGATA is a travelling in strument\, used to perform experimental campaigns at leading European nucl ear research facilities. Its importance will further increase in the futur e as AGATA is particularly suited for experimental conditions expected at the future facilities delivering intense radioactive ion beams as well as high-intensity stable ion beams\, which are currently under construction i n Europe. AGATA is presently is its seconde phase of construction with the goal of constructing a 3-pi array by 2030 [1-3].\n\nAGATA was located bet ween 2014 and 2021 at the GANIL facility\, Caen-France. Combined to the hi gh resolution MUGAST charged particle array [4] and the VAMOS magnetic spe ctrometer\, a large campaign of in-beam spectroscopy was performed using t he post-accelerated radioactive beams from the SPIRAL1 facility. The physi cs subjects cover the spectroscopy of un-bound states\, astrophysics\, she ll evolution and the role of the 3-body term in ab-initio calculations. Pu blished and unpublished results will be presented [5].\n\nThe current expe rimental campaign is running at LNL until end of 2026. Beyond that horizon \, the AGATA collaboration will decide the next location of the array. Pos sible candidates are European radioactive beams facilities such as SPES wi th post-accelerated fission fragments\, GANIL with light post-accelerated RIBs from SPIRAL1\, GSI/FAIR\, and the University of Jyvaskyla or HIE-ISOL DE at CERN. The specific strengths of each of these installations as well as envisaged physics cases are described in the AGATA White Book [3].\n\nR eferences :\n\n[1] AGATA Phase 1 achievements: A. Bracco\, G. Duchêne\, Z s. Podolyák\, P. Reiter. Gamma spectroscopy with AGATA in its first phase s: New insights in nuclear excitations along the nuclear chart. Prog. Part . Nucl. Phys.\, 2021\, 121\, pp.103887. http://dx.doi.org/10.1016/j.ppnp.2 021.103887 \n\n[2] AGATA EPJA Topical Issue https://epja.epj.org/component /toc/?task=topic&id=1878\n\n[3] AGATA White Book : W. Korten et al\, Eur. Phys. J. A (2020) 56:137 https://doi.org/10.1140/epja/s10050-020-00132-w \ n\n[4] M. Assié et al\, NIMA 1014\, 165743 (2021) https://doi.org/10.1016 /j.nima.2021.165743\n\n[5] I. Zanon et al Phys. Rev. Lett. 131 (2023) 2625 01 \nhttp://dx.doi.org/10.1103/PhysRevLett.131.262501\n\nhttps://indico.if ic.uv.es/event/7332/contributions/23762/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23762/ END:VEVENT BEGIN:VEVENT SUMMARY:The shell model in a quantum computer DTSTART;VALUE=DATE-TIME:20240530T165000Z DTEND;VALUE=DATE-TIME:20240530T171000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23130@indico.ific.uv.es DESCRIPTION:Speakers: Arnau Rios Huguet (University of Barcelona\, Institu te of Cosmos Sciences)\nThe nuclear shell model is one of the prime many-b ody methods to study the structure of atomic nuclei\, but it is hampered b y an exponential scaling on the basis size as the number of valence partic les increases. I will discuss a quantum circuit design strategy to find nu clear ground states by exploiting an adaptive variational quantum eigensol ver algorithm. This circuit implementation is in excellent agreement with classical shell-model simulations for a dozen of light and medium-mass nuc lei\, including neon and calcium isotopes. Simulated circuits approach the benchmark results with a polynomial scaling in quantum resources for each nucleus. I will also discuss entanglement measures\, their connection to nuclear structure observables as well as potential strategies to exploit e ntanglement forging in nuclear physics. This work paves the way for quantu m computing shell-model studies across the nuclear chart.\n\nhttps://indic o.ific.uv.es/event/7332/contributions/23130/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23130/ END:VEVENT BEGIN:VEVENT SUMMARY:Detailed structure of $^{131}$Sn populated in the $\\beta$-decay o f isomerically-purified $^{131}$In states DTSTART;VALUE=DATE-TIME:20240530T163000Z DTEND;VALUE=DATE-TIME:20240530T165000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23095@indico.ific.uv.es DESCRIPTION:Speakers: Jaime Benito García (Grupo de Fisíca Nuclear\, Fac ultad de Ciencias Físicas\, Universidad Complutense de Madrid- CEI Monclo a\, E-28040 Madrid\, Spain)\nNuclei with a large *N/Z* ratio are of great interest to test nuclear models and provide information about single parti cle states far off stability. During the last two decades there has been a substantial effort directed to gathering information about the region aro und the neutron-rich $^{132}$Sn [1-3]. Lifetimes of excited states provide direct access to the reduced transition probabilities of $\\gamma$ transi tions\, which play an important role in the investigation of nuclear struc ture and the nucleon-nucleon effective interaction. The information availa ble for the tin isotopes around $^{132}$Sn is scarce.\n\nThe excited stru cture of $^{131}$Sn was investigated in detail at the ISOLDE facility at C ERN. We profited from the selective ionization by the ISOLDE Resonance Ion ization Laser Ion Source (RILIS) [4] to enhance the production of each pa rticular isomer in $^{131}$In\, and study its decay separately for the fir st time. This measurement took place at the new ISOLDE Decay Station (IDS) \, equipped with four highly efficient clover-type Ge detectors\, along wi th a compact fast-timing setup consisting of two LaBr$_3$(Ce) detectors an d a fast $\\beta$-plastic detector [5-8].\n\nIn this contribution we will report on the first measurement of subnanosecond lifetimes in $^{131}$Sn. A noticeable short half-life was derived for the the $\\nu 3s^{-1}_{1/2}$ single-hole state\, indicating an enhanced *l* -forbidden M1 behaviour fo r the $\\nu 3s^{-1}_{1/2} \\to \\nu 3d^{-1}_{3/2}$ transition [9-11]. The measured half-lives of high-energy states\, provided valuable information on transition rates\, supporting the interpretation of these levels as cor e-excited states. In the other hand\, the unambiguous separation of the de cay provided an unique opportunity to disentangle the decay scheme of each $^{131}$In isomer. The extended level-schemes\, the position of the $\\nu 1h^{-1}_{11/2}$ single-hole state [12]\, as well as the observed correlat ion between n/$\\gamma$ competition above the neutron-separation energy an d the parent populating indium state will be discussed. Additionally\, a r evision of $\\beta$-decay properties\, such as log *ft* of the first-forbi dden single-particle transitions\, half-lives and P$_n$ values for the thr ee $^{131}$In $\\beta$-decaying states will be addressed. \n\n[1] T. Bj ̈ ornstad et al.\, Nuclear Physics A 453\, 463 (1986).\n[2] K. L. Jones et a l.\, Nature 465\, 454 (2010).\n[3] D. Rosiak et al.\, Phys. Rev. Lett. 121 \, 252501 (2018).\n[4] V. Fedosseev et al.\, Journal of Physics G: Nuclear and Particle Physics 44\, 084006 (2017).\n[5] H. Mach et al.\, Nucl. Inst rum. Meth. A 280\, 49 (1989).\n[6] M. Moszynski et al.\, Nucl. Instrum. Me th. A. 277\, 407 (1989).\n[7] L. M. Fraile\, Journal of Physics G: Nuclear and Particle Physics 44\, 094004 (2017).\n[8] J. Benito et al. (IDS Colla boration)\, Phys. Rev. C 102\, 014328 (2020).\n[9] A. Arima et al\, Progre ss of Theoretical Physics 17\, 567 (1957).\n[10] R. Lic ̆a et al. (IDS C ollaboration)\, Phys. Rev. C 93\, 044303 (2016).\n[11] V. Paziy et al.\, P hys. Rev. C 102\, 014329 (2020).\n[12] B. Fogelberg et al.\, Phys. Rev. C 70\, 034312 (2004).\n\nhttps://indico.ific.uv.es/event/7332/contributions/ 23095/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23095/ END:VEVENT BEGIN:VEVENT SUMMARY:Lifetime measurements in the A ~ 100 mass region via the coinciden ce Doppler-shift attenuation method DTSTART;VALUE=DATE-TIME:20240530T161000Z DTEND;VALUE=DATE-TIME:20240530T163000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23094@indico.ific.uv.es DESCRIPTION:Speakers: Anna Bohn (University of Cologne\, Institute for Nuc lear Physics)\nThe coincidence Doppler-shift attenuation method (CDSAM) is a powerful technique for determining nuclear level lifetimes in the femto second regime [1\,2].\nAt the SONIC@HORUS setup [3] at the University of C ologne\, several (p\,p'$\\gamma$)- and ($\\alpha$\,$\\alpha$'$\\gamma$)-CD SAM experiments have been performed with a focus on the A $\\approx$ 100 m ass region\, including Zr\, Ru\, Pd\, Sn\, and Te isotopes [4\,5\,6]. The combined SONIC@HORUS spectrometer allows for coincident detection of $\\ga mma$ rays and backscattered beam particles\, enabling background reduction \, precise transition selection and feeding exclusion. From each experimen t\, dozens of lifetimes can be determined. Additionally\, the analysis of particle-$\\gamma$-$\\gamma$ coincidences enables thorough and comprehensi ve spectroscopy. \nIn this contribution\, recent results on lifetime deter mination and spectroscopy will be presented\, highlighting the benefits de rived from coincidence measurements. \nSupported by the DFG (ZI-510/9-2). \n[1] A. Hennig *et al*.\, Nucl. Instr. and Meth. A **794**\, (2015) 171\n [2] M. Spieker *et al*.\, Phys. Rev. C **97**\, (2018) 054319\n[3] S. G. P ickstone *et al*.\, Nucl. Instr. and Meth. A **875**\, (2017) 104\n[4] S. Prill *et al*.\, Phys. Rev. C **105**\, (2022) 034319\n[5] A. Hennig *et a l*.\, Phys. Rev. C **92**\, (2015) 064317\n[6] S. Prill *et al*.\, Phys. C onf. Ser. **1643**\, (2020) 012157\n\nhttps://indico.ific.uv.es/event/7332 /contributions/23094/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23094/ END:VEVENT BEGIN:VEVENT SUMMARY:Mass measurements of N = 50 isotones and its implications in the n uclear structure around 100Sn DTSTART;VALUE=DATE-TIME:20240530T155000Z DTEND;VALUE=DATE-TIME:20240530T161000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23092@indico.ific.uv.es DESCRIPTION:Speakers: Samuel Ayet San Andrés (Instituto de Física Corpus cular - CSIC UV)\nMass spectrometry is invaluable for probing the essentia l characteristics of nuclei\, particularly their binding energy. The FRS I on Catcher at GSI employs a Multiple-Reflection Time-of-Flight Mass Spectr ometer (MR-TOF-MS) to achieve precise\, fast\, and sensitive mass measurem ents\, crucial for studying exotic nuclei far from stability. Previous inv estigations\, have scrutinized properties of nuclei surrounding the heavie st N=Z double-magic nucleus\, $^{100}$Sn [Horn]\, revealing discrepancies in properties like $Q_{ec}$ and production cross-sections [Hinke\, Lubos]. \nThe stability of nuclei along the N=Z line persists up to $^{40}$Ca (N=Z =20)\, beyond which\, instability prevails. This increasing divergence fro m stability poses challenges for both production and measurement technique s in reaching the heaviest N=Z nuclei. In a recent study it was possible t o determine the mass value of $^{100}$In\, based on this and trends in the shifted two-neutron separation energy\, the older $Q_{ec}$ value for $^{1 00}$Sn is favoured [Moug]. In the study that will be presented\, mass meas urements of isotones along the N=50 line (44$\\leq$Z$\\leq$48) approaching $^{100}$Sn were conducted\, yielding measurements for 14 ground and two i someric states [Moll].\nThe excitation energy of the long-lived isomer in $^{94}$Rh was determined for the first time and together with shell model calculations allowed a spin-parity assignment of the observed states.\nFir st direct mass measurement of $^{98}$Cd provided a much more accurate and trustful $Q_{ec}$ value than previous mass measurement methods. Systematic investigations of the shifted two-neutron shell-gap\, utilizing the newly acquired masses were performed\, confirming the results of the previous s tudy\, favouring specific $Q_{ec}$ values [Hinke]. Moreover\, the $Q_{ec}$ value obtained for $^{98}$Cd was also employed to analyze the Gamow-Telle r (GT) strength trend along the N=50 isotones\, which also has been compar ed to new state-of-the art calculations utilizing a large-scale shell mode l (LSSM). This results strongly support the newer $Q_{ec}$ values measured for $^{100}$Sn [Lubos].\n\n\n[Moll] A. Mollaebrahimi et al.\, Phys. Lett. B 839 (2023) 137833\n[Moug] Mougeot et al.\, Nat. Phys. 17\, 1099–1103 (2021).\n[Horn] C. Hornung et al.\, Phys. Lett. B 802 (2020) 135200\n[Hink e] C.B. Hinke\, et al.\, Nature 486 (2012) 341.\n[Lubos] D. Lubos\, et al. \, Phys. Rev. Lett. 122 (2019) 222502.\n\nhttps://indico.ific.uv.es/event/ 7332/contributions/23092/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23092/ END:VEVENT BEGIN:VEVENT SUMMARY:Shape coexistence and the onset of deformation around A=100: compa ring even-even and odd-even cases DTSTART;VALUE=DATE-TIME:20240530T153000Z DTEND;VALUE=DATE-TIME:20240530T155000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23076@indico.ific.uv.es DESCRIPTION:Speakers: Esperanza Maya Barbecho (Universidad de Huelva)\nSha pe of nuclei is determined by a fine balance between the stabilizing effec t of closed shells and the pairing and quadrupole forces that tend to indu ce deformation [1]. In the mass region around A=100\, there exist clear cut examples of the rapid appearance of deformation such as Zr (even-even) [2] and Nb isotopes (odd-even) [3]\, which can be understood in terms of the coexistence of two different configurations\, i.e.\, shape coexistenc e. Sr [4] isotopes are also good candidates to study the onset of nuclear deformation and the influence of shape coexistence\, while Ru and Mo [5] isotopes seem to be placed at the border of dilution of shape coexistence In addition\, the structural evolution of odd-mass isotopes in this regio n is significant due to the diversity of configurations and coexisting sha pes and to the enhancement of the onset of deformation [3].\nIn this contr ibution will be used as framework the Interacting Boson-Fermion Model [6] with Configuration Mixing (IBFM-CM) to introduce a mean-field view (intri nsic state) for studying the evolution of the nuclear deformation in A=100 region\, focussing on the case of odd-even Nb isotopes. Two complementary approaches will be used for studying shape evolution: first\, an algebrai c approach employing a laboratory frame of reference\, and secondly\, a ge ometric-oriented method within the context of an intrinsic state formalism . The objective is to compare the onset of deformation in Nb isotopes with the even-even cases\, such as Sr and Zr\, extracting information from the intrinsic state\, but also from spectroscopic properties.\nTo conclude\, by applying the IBFM-CM framework and employing both algebraic and geometr ic approaches\, this contribution aims at providing insights into the evol ution of nuclear shapes in even-even and odd-even nuclei in the mass regio n around A=100.\n\n[1] K. Heyde and J. L. Wood\, Rev. Mod. Phys. 83\, 146 7 (2011).\n[2] J.E. García-Ramos and K. Heyde\, Phys. Rev. C 100\, 044315 (2019).\n[3] N. Gavrielov\, A. Leviatan\, and F. Iachello\, Phys. Rev. C 106\, L051304 (2022).\n[4] E. Maya-Barbecho and J.E. García-Ramos\, Phys. Rev. C 105\, 034341 (2022).\n[5] E. Maya-Barbecho\, S. Baid\, J.M. Arias\ , and J.E. García-Ramos\, Phys. Rev. C 108\, 034316 (2023).\n[6] F. Iache llo and P. Van Isacker\, The interacting boson-fermion model (Cambridge Un iversity Press\, Cambridge\, 1991).\n\nhttps://indico.ific.uv.es/event/733 2/contributions/23076/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23076/ END:VEVENT BEGIN:VEVENT SUMMARY:A unified description of the shape phase transitions\, shape coexi stence and mixing phenomena in nuclei DTSTART;VALUE=DATE-TIME:20240530T151000Z DTEND;VALUE=DATE-TIME:20240530T153000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23125@indico.ific.uv.es DESCRIPTION:Speakers: Petrica Buganu (Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering)\nThe Bohr-Mottelson Hamiltonian [ 1\,2] has been numerically solved for a sextic oscillator potential in the β variable\, for both stable and unstable γ-axial deformations [3\,4]. The sextic potential\, depending on its parameters\, presents a single sph erical minimum\, a flat shape\, a single deformed minimum and simultaneous ly spherical and deformed minima separated by a barrier (maximum) [5\,6]. Therefore\, the sextic potential is suitable to describe a shape phase tra nsition and its corresponding critical point. Moreover\, only by increasin g step by step the barrier\, which separates the two minima\, one can cros s from the critical point of the shape phase transition to the shape mixin g and coexistence phenomena [7]. The model has also the ability to describ e unusually small B(E2) transitions\, observed in some nuclei\, by assumin g that states of the same band have different quadrupole deformation [8\,9 ]. Until now\, the model has been applied to a number of nuclei known to m anifest such phenomena: 238Pu\, 152Nd\, 170Hf [3]\, 76Kr [7]\, 96\,98\,100 Mo [4]\, 72\,74\,76Se [8]\, 74Ge\, 74Kr [10]\, 80Ge [9] and 42\,44Ca [11]. All these results are very promising for future applications and developm ents of the model. \nReferences\n1. A. Bohr\, Mat. Fyz. Medd. Dan. Vid. Se lsk. 26\, No. 14 (1952).\n2. A. Bohr\, B. R. Mottelson\, Mat. Fyz. Medd. D an. Vid. Selsk. 27\, No. 16 (1953).\n3. R. Budaca\, P. Buganu\, A. I. Buda ca\, Phys. Lett. B 776 (2018) 26 – 31.\n4. R. Budaca\, A. I. Budaca\, P. Buganu\, J. Phys. G: Nucl. Part. Phys. 46 (2019) 125102.\n5. G. Lévai\, J. M. Arias\, Phys. Rev. C 69 (2004) 014304.\n6. P. Buganu\, R. Budaca\, J . Phys. G: Nucl. Part. Phys. 42 (2015) 105106.\n7. R. Budaca\, A. I. Budac a\, EPL 123 (2018) 42001.\n8. R. Budaca\, P. Buganu\, A. I. Budaca\, Nucl. Phys. A 990 (2019) 137 - 148.\n9. A. Ait Ben Mennana\, R. Benjedi\, R. B udaca\, P. Buganu\, Y. El Bassem\, A. Lahbas\, M. Oulne\, Phys. Rev. C 105 (2022) 034347.\n10. A. Ait Ben Mennana\, R. Benjedi\, R. Budaca\, P. Buda ca\, Y. El Bassem\, A. Lahbas\, M. Oulne\, Phys. Scr. 96 (2021) 125306.\n1 1. R. Benjedi\, R. Budaca\, R. Budaca\, P. Buganu\, Y. El Bassem\, A. Lahb as\, M. Oulne\, paper submitted for publication.\n\nhttps://indico.ific.uv .es/event/7332/contributions/23125/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23125/ END:VEVENT BEGIN:VEVENT SUMMARY:Core-breaking effects approaching $^{100}$Sn: lifetime measurement s in $^{98\,100}$Cd DTSTART;VALUE=DATE-TIME:20240530T143000Z DTEND;VALUE=DATE-TIME:20240530T145000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23069@indico.ific.uv.es DESCRIPTION:Speakers: Marta Polettini (University and INFN Padova)\nThe nu clear structure of doubly magic nuclei such as $^{100}$Sn and its neighbor ing isotopes is of significant interest due to the valuable insights it of fers for testing the nuclear shell model. However\, describing the nearby Cd isotopic chain poses additional challenges due to the enhanced correlat ions induced by two proton holes in the g9/2 orbit. In particular\, $^{98} $Cd (Z=48\, N=50) stands out as the most proton-rich N=50 isotone for whic h information about excited states is available\, while data on lifetimes remain scarce.\n\nAn experimental study with the aim of measuring the life times of low-lying excited states below the 8$^+$ seniority isomer in the neutron-deficient $^{98\,100}$Cd isotopes was performed at GSI-FAIR as par t of the FAIR Phase-0 program. Ions of interest were populated via a relat ivistic fragmentation reaction induced by an 839~MeV $^{124}$Xe beam. The nuclei were then selected and identified using the FRagment Separator (FRS ) and subsequently implanted in the DEcay SPECtroscopy (DESPEC) station. T he lifetime measurements were conducted using the FATIMA LaBr$_3$(Ce) arra y employing the Generalised Centroid Difference (GCD) method.\n\nThe obtai ned results will be discussed and compared with shell model calculations\, employing various model spaces and interactions. These comparisons reveal that while $^{98}$Cd is consistent with a seniority scheme description\, configuration mixing plays a crucial role in describing the measured B(E2) values in $^{100}$Cd\, with significant contributions from both proton an d neutron core excitations.\n\nhttps://indico.ific.uv.es/event/7332/contri butions/23069/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23069/ END:VEVENT BEGIN:VEVENT SUMMARY:New isomers in 213Tl and 215Tl revealing shell evolution beyond N = 126 shell closure DTSTART;VALUE=DATE-TIME:20240530T141000Z DTEND;VALUE=DATE-TIME:20240530T143000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23080@indico.ific.uv.es DESCRIPTION:Speakers: Tik Tsun Yeung (The University of Tokyo)\nExperiment al data of isomerism in the neutron-rich N ≥ 126 region are important to test the predictability of shell evolution beyond the N = 126 shell closu re by shell-model calculations. Moreover\, the predicted properties of mor e exotic isotopes could affect the abundance of actinides in r-process cal culations [1]. However\, these information are scarcely available as it is challenging to access this region by current facilities. \n\nWe will pres ent new isomeric transitions in the BRIKEN experiment [2] at RIBF\, RIKEN Nishina Center. Particle identification of isotopes with mass ranging 200 ≲ A ≲ 220 was confirmed by the BigRIPS separator and the novel silicon dE telescope. For the first time at RIBF\, decays of nuclei southeast of 208Pb were measured by the BRIKEN array [3]. New isomers in 213Tl and 215T l [4] were observed by correlation among implantation\, Meitner-Ellis elec tron [5] and γ events using WAS3ABi active stopper [6] and high-purity ge rmanium (HPGe) clover detector. Our proposed isomeric level schemes [4] ar e compared to the shell-model calculations [7] to explain shell evolution. Plans to further investigate isomeric transitions and β decays in the sa me region will be introduced. \n\nReferences \n[1] E. Holmbeck et al.\, As trophys. J. 870(1)\, 23 (2019).\n[2] J. Wu et al.\, RIBF NP-PAC Proposal N P1712-RIBF158 (2017).\n[3] A. Tolosa-Delgado et al.\, Nucl. Instrum. Metho ds. Phys. Res. A 925-133 (2019).\n[4] T. T. Yeung\, A. I. Morales\, J. Wu\ , M. Liu\, C. Yuan et al.\, First Exploration of Monopole-Driven Shell Evo lution above the N = 126 shell closure: new Millisecond Isomers in 213Tl a nd 215Tl\, arXiv:2401.06428 (2024). https://arxiv.org/abs/2401.06428 \n[5] H. E. Mahnke\, Notes Rec. 76(1)\, 107-116 (2022).\n[6] S. Nishimura\, Pro g. Theor. Exp. Phys. 2012(1)\, 03C006 (2012).\n[7] C. Yuan et al.\, Phys. Rev. C 106(4)\, 044314 (2022).\n\nhttps://indico.ific.uv.es/event/7332/con tributions/23080/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23080/ END:VEVENT BEGIN:VEVENT SUMMARY:Octupole correlations in the neutron-deficient $^{110}$Xe nucleus DTSTART;VALUE=DATE-TIME:20240530T105000Z DTEND;VALUE=DATE-TIME:20240530T111000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23111@indico.ific.uv.es DESCRIPTION:Speakers: Andres Illana Sison (UCM)\nOctupole correlations nea r $N = Z = 56$ are unique in sense that they occur between particles in th e same orbitals for both neutrons and protons. In this region just above $ ^{100}$Sn\, it is expected that enhanced octupole correlations will take p lace at low and medium spins in the light Te ($Z = 52$)\, I ($Z = 53$) and Xe ($Z = 54$) nuclei [1]. In this region of the nuclear chart\, the Fermi surface for both neutrons and protons lies close to orbitals from the $d_ {5/2}$ and $h_{11/2}$ subshells\; octupole correlations emerge from the in teractions of particles in these orbitals with valence neutrons and proton s outside the $^{100}$Sn core [2\, 3]. As a result of the octupole correla tions\, an enhancement of octupole collectivity is expected to appear. Clo se to N = Z = 56\, a level structure characteristic of octupole correlatio ns\, consisting of negative-parity states and enhanced E1 transitions\, ha s been observed in a number of cases including $^{112}$Xe [4]\, $^{114}$Xe [5\, 6\, 7] and $^{118}$Ba [8]. \nWith the aim to observe for the first t ime the octupole band in the neutron-deficient ($N = Z + 2$) $^{110}$Xe nu cleus\, an in-beam experiment was performed at the Accelerator Laboratory of the University of Jyv\\”askyl\\”a\, Finland. The $^{110}$Xe nuclei were produced via the $^{54}$Fe($^{58}$Ni\,2n) fusion-evaporation reaction . The emitted $\\gamma$ rays were detected using the JUROGAM3 $\\gamma$-ra y spectrometer [9]\, while the fusion-evaporation residues were separated with the MARA separator [10]. In this experiment\, we were able to prove t he existence of the octupole band via the identification of the low-lying 3$^{-}$ and 5$^{-}$ states\, and their inter-band E1 transitions between t he ground-state band and the octupole band [11]. Hence\, this new experime ntal findings will be presented combined with a detailed study of the syst ematics of the energy levels and the B(E2)/B(E1) ratios in $^{110-114}$Xe\ , and a comparison with state-of-the-art theoretical calculations.\n\n\n[1 ] G. de Angelis et al.\, Phys. Lett. B 437 (1998) 236.\n[2] P.A. Butler an d W. Nazarewicz\, Rev. Mod. Phys. 68 (1996) 349.\n[3] L.M. Robledo and G. F. Bertsch\, Phys. Rev. C 84 (2011)\, 054302.\n[4] J.F. Smith et al. Phys. Lett. 523 B\, 13 (2001).\n[5] S.L. Rugari et al. Phys. Rev. C 48\, 2078 ( 1993).\n[6] E.S. Paul et al.\, Nucl. Phys. A673\, 31 (2000).\n[7] G. de An gelis et al.\, Phys. Lett. B 535 (2002) 93.\n[8] J.F. Smith et al.\, Phys. Rev. C5 7\, R1037-R1041 (1998).\n[9] J. Pakarinen et al.\, Eur.Phys. J. A 56 (2020) 150.\n[10] J. Sar\\’en et al.\, Nucl. Instr. and Meth. B 266 ( 2008) 4196-4200.\n[11] A. Illana et al.\, Phys. Lett. B 848 (2024) 138371. \n\nhttps://indico.ific.uv.es/event/7332/contributions/23111/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23111/ END:VEVENT BEGIN:VEVENT SUMMARY:Shedding new light on the structure of $^{56}$Ni using (n\,3n) rea ction at NFS DTSTART;VALUE=DATE-TIME:20240530T103000Z DTEND;VALUE=DATE-TIME:20240530T105000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23096@indico.ific.uv.es DESCRIPTION:Speakers: Hemantika Sengar (GANIL)\nSystematic studies of nucl ear reactions are essential to the development of nuclear physics.\nUnders tanding and predicting the evolution of nuclear structure and the novel ph enomena in atomic nuclei has long been a pursuit of scientific curiosity. \nConventional methods such as charged particle probes\, $\\beta$-decay\, Coulombic-excitation\, and heavy-ion fusion evaporation reactions have bee n employed so far in the phase space of Shell structure\, magic numbers\, angular momentum\, and excitation energy. However\, the horizon of possibi lities expands when we delve into the uncharted territories of fast-neutro n probes. The (n\,xn) reactions are a long-standing reaction mechanism use d in the cross-section data evaluation\, but rarely used in the framework of nuclear structure.\nThis might unveil a treasure trove of reactions\, p articularly the (n\,xn) reactions with high production thresholds\, which\ , until now\, have not been looked at from the eye of nuclear structures.\ nAs a result\, we know very little about their reaction mechanisms.\n\n\nW hile the structure of $^{56}$Ni has been previously investigated using cha rged particle and heavy ions collisions as shown in Fig.1. ![Yrast Diagram ][1]\, a pure neutron probe was never used.\nFor the first time\, using t he unprecedented neutron flux at $\\sim$20 - 40 MeV at the Neutrons for Sc ience (NFS) facility of GANIL--Spiral2\, $^{56}$Ni can be populated from $ ^{58}$Ni in a (n\,3n) reaction which has a cross-section of 2 mb at $\\sim $30 MeV\, opening a new probe and possibly new aspects of the nuclear stru cture of this doubly magic nucleus.\nThe TALYS cross-section calculation a s a function of incident neutron energy is shown in Fig.2. ![^{56}Ni cross -section][2].\nThe maximum cross-section is predicted to be at 40 MeV\, sl ightly higher than the end-point of NFS.\np + Li / Be allows reaching the [20-30] MeV range\, whereas d + Be allows up to a broader [25-40] MeV rang e.\nWith $^{58}$Ni target\, studying pure neutron channels is the main int erest alongside Co isotopes that are produced from (n\,p/d/t) reaction. \n \nThe nuclei near $^{56}$Ni are of particular interest as they are amenabl e to different microscopic theoretical treatments while studying the compe tition between single-particle and collective excitations. The collective states in $^{56}$Ni involve multiparticle multi-hole excitations across th e $N=Z=28$ shell gap from the 1f$_{7/2}$ shell to the 2p$_{3/2}$\, 1f$_{5/ 2}$\, and 2p$_{1/2}$ orbits. Excitation to the higher lying 1g$_{9/2}$ orb it are necessary to explain the observed rotational bands in Cu and Zn. At high excitation energies\, reaction studies have revealed evidence for hy per-deformed resonances in the $^{56}$Ni compound. \n\n\nIn this project\, we performed prompt-$\\gamma$ spectroscopy of $^{56}$Ni using the EXOGAM array at NFS.\nFrom nuclear structure's point of view\, the main motivatio n is the search for low spin (J=2 or 4) states from 3 to 10 MeV excitation energy possibly populating the $0^{+}$ states at 3956 keV\, 6654 keV and 7903 keV observed only in $^{58}$Ni(p\,t)$^{56}$Ni and $^{58}$Ni($^{3}$He\ ,n)$^{56}$Ni reactions. New spectroscopic information that will be collect ed is also relevant for nuclear reaction mechanism formalism (like TALYS) and nuclear data evaluation libraries.\n\n\n\nThe experiment was carried o ut in October 2023. During an effective beam time of ~11 days\, a high ene rgy neutron beam produced by a primary beam of 10 $\\mu$Amps of $^{2}$H\, bombarded a 1mm thick Ni target.\nThe prompt gamma rays selected on the fa stest neutron using the Time of Flight information have been detected by 1 2 EXOGAM clovers placed at 15 cm off the beam axis. \nAbout $1.6 \\times 1 0^{10}$ $\\gamma\\gamma$ coincidences have been sorted after the AddBack p rocedure.\nThe $^{56}$Ni decay was observed and a large number of $\\gamma \\gamma$ coincidences for $^{57}$Ni and Co isotopes were sorted.\nThe very preliminary analysis of the experiment\, focusing mainly on the pure neut ron channels\, will be presented.\nThe (n\,2n) channel that produces $^{57 }$Ni has a much larger cross-section\, reaching a maximum of $\\sim$90 mb at around 23 MeV\, making it easier to study. Additionally\, $^{57}$Ni is only one neutron away from the doubly magic $^{56}$Ni\, making spectroscop y of single particle\, core-coupled\, and collective states of great inter est. The primary focus of the talk will be to provide a comprehensive desc ription of its level scheme and excitation functions. This isotope has a h alf-life of 35.6 hours and undergoes $\\beta^{+}$ decay to produce $^{57}$ Co in the system\, which interestingly is also populated by the (n\,d) and (n\,n$'$p) channels. \nThe question of whether large germanium volume det ectors can be used for $\\gamma$ spectroscopy in a high flux high neutron energy environment will also be addressed.\n\nThis experiment is a pioneer ing work in the study of the nuclear structure studies using large gamma a rray and fast neutron and is only possible at GANIL-Spiral2 as of today.\n If successful\, this program will open a new door for nuclear structure st udies.\n\n\n [1]: https://gitlab.com/H_sen1122/open_gaca/-/raw/main/Yrast _dobara.png?ref_type=heads\n [2]: https://gitlab.com/H_sen1122/open_gaca/ -/raw/main/Ni58to56cs.png?ref_type=heads\n\nhttps://indico.ific.uv.es/even t/7332/contributions/23096/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23096/ END:VEVENT BEGIN:VEVENT SUMMARY:Nuclear structure and dynamics of the GDR at low temperatures and its influence in the universal abundance of elements DTSTART;VALUE=DATE-TIME:20240530T100000Z DTEND;VALUE=DATE-TIME:20240530T103000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23768@indico.ific.uv.es DESCRIPTION:Speakers: Jose Nicolas Orce (University of the Western Cape\, South Africa)\nAstronomical observations indicate that the abundances of h eavy elements from barium to lead in metal-poor stars are consistent with the scaled Solar system abundance pattern for the rapid-neutron capture or r-process\, where 50% of the heavy elements beyond iron are expected to b e produced in stellar explosions such as neutron star mergers. Given that the Sun formed billions of years after these metal-poor stars\, from gas t hat was enriched by many stellar generations in various ways\, such an ast ounding agreement suggests that the way these elements are produced is uni versal [1-3]. The origin of such an universal abundance pattern was obscur ed with a couple of scenarios being suggested: 1) An artifact of nuclear p roperties such as binding energies and $\\beta$-decay rates. 2) A single c osmic site with astrophysical conditions that are generated uniformly thro ughout cosmic time. Here we provide a solution to the universal compositio n of matter through the decreasing binding energy of nuclei at the tempera tures occurring in stellar explosions\, which arise from a slight increase in the energy of the giant dipole resonance (GDR)\, a collective motion o f protons and neutrons out of phase\, which is responsible for the most of the absorption of photons in nuclei and the nuclear dipole polarization. Such changes narrow down the reaction network for element production in st ellar explosions\, and explain the long-sought universality of elemental a bundances [4].\n\n[1] Frebel\, Annu. Rev. Nucl. Part. Sci. 68 (2018) 237\n \n[2] Sneden\, Cowan\, and Gallino\, Ann. Rev. Astron. Astrophys. 46 (2008 ) 241\n\n[3] Ji\, Frebel\, Chiti et al. Nature 531 (2016) 610\n\n[4] Orce et al.\, MNRAS 525 (2023) 6249\n\nhttps://indico.ific.uv.es/event/7332/con tributions/23768/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23768/ END:VEVENT BEGIN:VEVENT SUMMARY:Nuclear giant resonances studied by a self-consistent Skyrme quasi particle vibration coupling approach DTSTART;VALUE=DATE-TIME:20240530T093000Z DTEND;VALUE=DATE-TIME:20240530T100000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23766@indico.ific.uv.es DESCRIPTION:Speakers: Yifei Niu (Lanzhou University\, P. R. China)\nNuclea r giant resonances provide deep insight in understanding the structure of atomic nuclei as well as constraining the nuclear equation of state (EoS). The giant monopole resonance (GMR) and giant dipole resonance (GDR) provi de effective constraints on nuclear incompressibility and symmetry energy slope parameter\, respectively. The giant quadrupole resonance (GQR) gives useful information on nucleon effective mass. The quasiparticle random ph ase approximation (QRPA) model is the most commonly used microscopic model to study the giant resonances of atomic nuclei. However\, due to the lack of higher-order many-body correlations beyond the mean field\, the resona nce width cannot be given\, and serious problems are encountered when desc ribing the GMR energies. In this talk\, I will introduce how to solve the above problems by developing a self-consistent quasiparticle random phase approximation + quasiparticle vibration coupling model based on Skyrme den sity functional which considers higher-order many-body correlations. Furth ermore\, facing to various modes of nuclear giant resonances\, the photonu clear reaction is only limited to the study of nuclear dipole excitations\ , so I will discuss new possibilities to excite different modes of nuclear giant resonances with vortex photons.\n\nhttps://indico.ific.uv.es/event/ 7332/contributions/23766/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23766/ END:VEVENT BEGIN:VEVENT SUMMARY:4He + 4He elastic and inelastic scattering: probing the mysterious properties of the second 0+ state of 4He DTSTART;VALUE=DATE-TIME:20240529T084000Z DTEND;VALUE=DATE-TIME:20240529T090000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23065@indico.ific.uv.es DESCRIPTION:Speakers: V. Soukeras (INFN – Laboratori Nazionali del Sud\, Catania\, Italy)\nThe $^4$He nucleus is one of the simplest nuclear syste ms. No bound excited states are present in its level scheme however\, a pr onounced resonance with the same spin and parity (0$^+$) as the ground sta te exists with a centroid slightly above the proton emission energy thresh old. The results from several available studies show discrepancies on the determination of the $^4$He(0$^+_2$) resonance energy\, width and line sha pe. Furthermore\, recent results focusing on the first excited resonant st ate of $^4$He nucleus\, reveal a puzzling situation potentially calling fo r missing physics in our best known nuclear forces and\, consequently\, in our understanding of the nuclear phenomenology. Into this context\, we pe rformed new measurements of the $^4$He resonance by $^4$He + $^4$He scatte ring at the MAGNEX facility of INFN – Laboratori Nazionali del Sud\, fea turing data of unprecedented sensitivity and state-of-art analyses of the spectral line shape and the scattering cross sections. Our experimental da ta on the line shape of the $^4$He(0$^+_2$) and on elastic and inelastic d ifferential cross section angular distributions allow for a new insight on the relevant role of the interference between the resonance and the under lying non-resonant continuum. Our data can be reasonably described within the known physics of nuclear interactions and resonance properties\, indic ating no hint for new physics from $^4$He resonance properties.\n\nhttps:/ /indico.ific.uv.es/event/7332/contributions/23065/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23065/ END:VEVENT BEGIN:VEVENT SUMMARY:Pair vibrational modes and many-body effects DTSTART;VALUE=DATE-TIME:20240529T082000Z DTEND;VALUE=DATE-TIME:20240529T084000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23079@indico.ific.uv.es DESCRIPTION:Speakers: Enrico Vigezzi (INFN Milano)\nWe present a theoretic al framework for treating the full excitation spectrum of Jπ = 0+ pair ad dition modes\, including the well-known low-lying and bound Pairing Vibrat ion on par with the predicted Giant Pairing Vibration lying in the continu um [1]. Our formalism includes the coupling to low-energy collective quadr upole modes of the core\, in such a way that both single-particle self-ene rgy effects and the pairing interaction induced by phonon exchange are acc ounted for. The theory is applied to the case of the excitation spectrum o f 14C\, recently populated by two-neutron transfer reactions [2]. We find that the particle vibration coupling drastically modifies the spectrum ob tained by conventional pp-RPA calculations. We obtain good agreement with experimental data for bound states. Our calculations pave the way for deta iled calculations of two-neutron transfer cross sections.\n\n[1] F. Barran co\, G. Potel and E. Vigezzi\, ArXiv:2402.14166\n\n[2] F. Cappuzzello\, D. Carbone\, M. Cavallaro\, M. Bondì\, C. Agodi\, F. Azaiez\, A. Bonaccorso \, A. Cunsolo\, L. Fortunato\, A. Foti\, S. Franchoo\, E. Khan\, R. Linare s\, J. Lubian\, J.A. Scarpaci and A. Vitturi\, Nature Comm. 6 (2015) 6743\ n\nhttps://indico.ific.uv.es/event/7332/contributions/23079/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23079/ END:VEVENT BEGIN:VEVENT SUMMARY:Proton-neutron pairing and α-like quartet condensation in N=Z nuc lei DTSTART;VALUE=DATE-TIME:20240529T080000Z DTEND;VALUE=DATE-TIME:20240529T082000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23128@indico.ific.uv.es DESCRIPTION:Speakers: Nicolae Sandulescu (IFIN-HH)\nProton-neutron pairing and α-like quartet condensation in N=Z nuclei \n Nicolae Sandulescu\n National Institut e of Physics and Nuclear Engineering\, Magurele-Bucarest\, Romania \n \nA specific feature of N = Z nuclei is the occurrence of α -like qua rtet structures\, composed by two neutrons and two protons\, which have st rong internal correlations and interact weakly with each other. Various st udies have shown that the ground states of N=Z systems interacting by prot on-neutron pairing interactions can be described by a condensate of α-lik e quartets [1-9]. This quartet condensate is the analogous of the Cooper pair condensate\, commonly employed to treat the neutron or proton pairing correlations. As shown recently\, the quartet condensation is also relate d to the band-like structures of even-even N=Z nuclei [10-11]. More preci sely\, the low-lying excitations of these nuclei are associated to the bre aking of a quartet from the ground state quartet condensate and replacing it with an excited quartet. \n In the first p art of the talk I will present an overview of the issues mentioned above. Then I will discuss how the fingerprints of the α-like quartet condensati on might show up in the α transfer reactions along a chain of even-even N =Z nuclei [12].\n\n \n[1] B. H. Flowers and M. Vujicic\, Nucl. Phys. 49\, 586 (1963).
\n[2] Y. K. Gambhir\, P. Ring\, and P. Schuck\, Phys. Rev. L ett. 51\, 1235 
(1983).\n[3] J. Dobes and S. Pittel\, Phys. Rev. C 57\, 688 (1998). 
\n[4] N. Sandulescu\, D. Negrea\, C. W. Johnson\, Phys. Rev . C 85\, 061303(R)\, (2012). 
\n[5] N. Sandulescu\, D. Negrea\, D. Gamba curta\, Phys. Lett. B 751\, 348 (2015). 
 \n[6] M. Sambataro and N. Sand ulescu\, Phys. Rev. Lett. 115\, 11 (2015). \n[7] M. Sambataro and N. Sandu lescu\, Eur. Phys. J. A 53\, 47 (2017).\n[8] M. Sambataro and N. Sandules cu\, J. Phys. G: Nucl. Part. Phys. 47\, 11\, (2020). \n[9] D. Negrea\, N. Sandulescu and D. Gambacurta\, Phys. Rev. C 105\, 034325 (2022). \n[10] M. Sambataro and N. Sandulescu\, Phys. Lett. B 827\, 136987 (2022).\n[11] M. Sambataro and N. Sandulescu\, Eur. Phys. J. A 59\, 87 (2023) .\n[12] N. S andulescu\, M. Sambataro\, A. Volya\, EPJ Web Conf (2024)\, in press\n\nh ttps://indico.ific.uv.es/event/7332/contributions/23128/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23128/ END:VEVENT BEGIN:VEVENT SUMMARY:Sub-barrier transfer reactions and the nuclear Josephson effect DTSTART;VALUE=DATE-TIME:20240529T073000Z DTEND;VALUE=DATE-TIME:20240529T080000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23758@indico.ific.uv.es DESCRIPTION:Speakers: Lorenzo Corradi (INFN - Laboratori Nazionali di Legn aro\, Legnaro (Padova)\, Italy)\nA series of sub-barrier transfer experime nts have been recently carried out at LNL\, with reaction products detecte d in inverse kinematic and at forward angles with the large solid angle ma gnetic spectrometer PRISMA. We measured transfer cross sections far below the Coulomb barrier\, making excitation functions down to very low energie s. At these low energies\, corresponding to very large distances of closes t approach\, the nuclear absorption is small [1\,2\,3] and one can probe n ucleon-nucleon correlation properties. For the (well Q-value matched) one and two neutron transfer channels in the system 60Ni+116Sn the microscopic calculations very well reproduce the experimental data in the whole energ y range\, both in magnitude and slope [2]. The fact that most of the cross section of the two neutron transfer channel is in the ground to ground st ate transition has been further confirmed by a second experiment [4]. Prot on transfer channels have been also analyzed [5]\, showing a large yield i n the population of two proton transfer channels\, indicating the presence of strong proton-proton correlations.\nThese kind of studies\, where we f ollowed the behaviour of the transfer probabilities by varying the in tern uclear distance\, turned out to be fundamental to probe nucleon-nucleon co rrelation effects\, where the interaction between the nuclear surfaces pla ys a fundamental role. In this context\, the coupling of the AGATA gamma a rray to PRISMA offered a unique opportunity to study a nuclear (alternatin g current (AC)) Josephson-like effect [6]\, with Cooper-pair tunnelling be tween superfluid nuclei\, whose manifestation has been recently proposed [ 7] using the data of Refs. [2\,4] as a stepping stone. Predictions have be en made of a specific gamma strength function associated with the dipole o scillations generated by the\, mainly successive\, two neutron transfer pr ocess. In a very recent experiment carried out at LNL with PRISMA+AGATA we directly tested for the\nfirst time the possible manifestation of this im portant effect of Cooper pair behaviour\, observed to date only in condens ed matter physics.\nAfter a general overview on the subject\, the talk wil l focus on new results\, addressing the new achievements and the critical issues.\n\n[1] L. Corradi et al.\, Phys. Rev. C 84\, 034603 (2011).\n[2] D . Montanari et al.\, Phys. Rev. Lett. 113\, 052601 (2014).\n[3] L. Corradi \, G. Pollarolo\, and S. Szilner\, J. Phys. G: Nucl. Part. Phys. 36\, 1131 01 (2009).\n[4] D. Montanari et al.\, Phys. Rev. C 834\, 137477 (2022).\n[ 5] L. Corradi et al.\, Phys. Lett. B 93\, 054623 (2016).\n[6] B.D. Josephs on\, Phys. Lett. 1\, 251 (1962).\n[7] G. Potel\, F. Barranco\, E. Vigezzi\ , and R. A. Broglia\, Phys. Rev. C 103\, L021601 (2021).\n\nhttps://indico .ific.uv.es/event/7332/contributions/23758/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23758/ END:VEVENT BEGIN:VEVENT SUMMARY:Highlights from the  rst transfer experiment at GANIL with ACTAR TPC DTSTART;VALUE=DATE-TIME:20240529T070000Z DTEND;VALUE=DATE-TIME:20240529T073000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23778@indico.ific.uv.es DESCRIPTION:Speakers: B. Fernández-Domínguez (IGFAE/Universidade de Sant iago de Compostela\,)\nDirect reactions are fundamental tools to investiga te the structure of exotic nuclei. Stud-\nies of nuclei far away from stab ility are usually performed with secondary radioactive beams\,\nthat su  er from low intensities and need to be compensated with thick targets and high\ne cient detection systems to increase luminosity. Active targets a re invaluable devices that\,\namong other important features\, allow to re construct the reaction in three dimensions with-\nout loss of resolution.\ nThe ACtive TArget and Time Projection Chamber (ACTAR TPC) detector [1\,3] has been\ndeveloped at GANIL to cover a broad physics programme. The devi ce was commissioned in\n2018 showing an excellent performance of the detec tor [4]. Since then\, several experiments\nhave been performed at GANIL. I n this talk\, I will present the results from the single-proton\nremoval r eaction 20O(d\,3He)19N which aimed at probing the Z=6 shell gap towards th e\nneutron dripline. From all the magic numbers that emerge as a consequen ce of the spin-\norbit splitting\, the gaps at 6 and 14\, were already con sidered by Goepper-Mayer and Jensen\nas very weak [5]. However\, experimen tal results published in Nature [6] showed evidence for\na Z=6 shell closu re. A (p\,2p) experiment [7] was performed later and supports a moderate\n reduction of the 1p1=2 and 1p3=2 splitting. Yet not direct measurement of the gap has been\nobtained so far.\nThe goal of the 20O(d\,3He)19N [8] exp eriment at GANIL is twofold: First\, the experiment\nwill provide a unique way of determining the gap between the 1p1=2 and 1p3=2 single-particle\ns tates in 19N and will bring crucial information on the Z=6 shell gap. Seco nd\, this experiment\nis the  rst transfer experiment with the new gener ation of active targets. Originally\, these\ntransfer experiments required the use of complex arrays for particle and gamma detection\nsystems to im prove selectivity. The use of active targets overcomes the aforementioned\ ndi culties and is specially well adapted to explore new regions of the nuclear chart with\nunprecedented resolution using a much more compact det ection system.\nReferences\n[1] T. Roger et al. Nucl. Instrum. Meth. Phys. Res. A 895\, 126 (2018).\n[2] J. Pancin et al. Nucl. Instrum. Meth. Phys. Res. A 735\, 532 (2014).\n[3] P. Konczykowski et al.\, Nucl. Instrum. Met h. Phys. Res. A 927\, 125 (2019).\n[4] B. Mauss et al. Nucl. Instrum. Meth . Phys. Res. A 940\, 498 (2019).\n[5] M. Goeppert Mayer\, Nobel Lectures\, Physics\, 2037 (1963).\n[6] D. T. Tran\, H. J. Ong et al.\, Nature commun ications 9 (2018) 1594\n[7] I. Syndikus et al.\, Phys. Lett. B 809 (2020) 135748\n[8] J. Lois-Fuentes\, Ph. D. USC (2023)\n\nhttps://indico.ific.uv. es/event/7332/contributions/23778/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23778/ END:VEVENT BEGIN:VEVENT SUMMARY:Multiple shape coexistence around 80Zr region DTSTART;VALUE=DATE-TIME:20240527T093000Z DTEND;VALUE=DATE-TIME:20240527T100000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23777@indico.ific.uv.es DESCRIPTION:Speakers: Tomás R. Rodríguez (Universidad Complutense de Ma drid)\nNeutron‐deficient nuclei around mass number A~80 are of great int erest in nuclear structure and nuclear astrophysics (this region\, e.g.\, is explored in the rp‐process nucleosynthesis). Although shape‐coexist ence is becoming a rather common feature along the nuclear chart [1]\, the region of medium‐mass N~Z nuclei is expected to show several collective structures associated to distinctive shapes present at the mean‐field a pproximation\, i.e.\, multiple shape coexistence [2].\nOne of the best sui ted theoretical tools to study these phenomena is the projected generator coordinate method (PGCM\, also referred to as symmetry conserving configur ation mixing\, or multi-reference energy density functional methods) [3]. In this contribution I will discuss the application of the PGCM method wit h the Gogny energy density functional in the description of multiple shape coexistence in N≃Z nuclei from 56Ni to 100Sn.\n[1] P. E. Garrett\, M. Z ielińska\, E. Clément\, Prog. Part. Nucl. Phys. 124\, 103921 (2022).\n[2 ] T. R. Rodríguez\, J. L. Egido\, Phys. Lett. B 705\, 255 (2011).\n[3] L. M. Robledo\, T. R. Rodríguez\, R. R. Rodríguez‐Guzmán\, J. Phys. G: Nucl. Part. Phys. 46 013001\n(2019).\n\nhttps://indico.ific.uv.es/event/73 32/contributions/23777/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23777/ END:VEVENT BEGIN:VEVENT SUMMARY:The AGATA physics campaign at Legnaro National Laboratories DTSTART;VALUE=DATE-TIME:20240527T100000Z DTEND;VALUE=DATE-TIME:20240527T103000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23693@indico.ific.uv.es DESCRIPTION:Speakers: Jose Javier Valiente Dobon (LNL-INFN)\nIn April 2022 \, AGATA\, the European Ge-array at the forefront of gamma detection techn ology [1\,2] was installed at LNL. Based on the new concept of gamma-ray t racking\, it can identify the gamma interaction points (pulse shape analys is) and reconstruct via software the trajectories of the individual photon s (gamma-ray tracking). Shortly thereafter a physics campaign has started using stable beams ranging from hydrogen to lead\, delivered by the Tandem -ALPI-PIAVE accelerator complex at energies from 20-25 MeV/u (lightest ion s) to about 7-8 MeV/u (heaviest ions). In the first phase AGATA has been c oupled to the PRISMA heavy-ion magnetic spectrometer to access the study o f exotic nuclei produced in multi-nucleon transfer and fusion-fission reac tions. Different silicon detector arrays for light charged particles and i ons have also been used. The physics cases under study involve shell evolu tion and configuration mixing in key regions of the nuclear chart\, such t he N=20 island of inversion and the nuclei around the doubly-magic 78Ni\, quadrupole and octupole shapes and collectivity across a wide range of nuc lear masses\, as well as measurements of astrophysical interest. Several C oulomb-excitation experiments investigated shape coexistence along the Z=4 0 and Z=50 lines. In this presentation\, the current status of the physics campaign ant its main results will be discussed.\n\n\nReferences\n\n[1] A . Akkoyun et al.\, NIM A 668\, 26 (2012).\n[2] J.J. Valiente-Dobón et al. \, NIM A 1049 168040 (2023).\n\nhttps://indico.ific.uv.es/event/7332/contr ibutions/23693/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23693/ END:VEVENT BEGIN:VEVENT SUMMARY:Measurement of 27Al(α\, nγ)30P reaction yields and angular corre lations. DTSTART;VALUE=DATE-TIME:20240528T173000Z DTEND;VALUE=DATE-TIME:20240528T190000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23122@indico.ific.uv.es DESCRIPTION:Speakers: Odette Alonso-Sañudo (Grupo de Física Nuclear (GFN ) and IPARCOS\, Universidad Complutense (UCM))\nReactions induced by alpha particles are important in multiple research areas such as nuclear astrop hysics\, nuclear technologies\,dark matter searches and neutrino physics. Accurate data on neutron yields from the interaction of α-particles with nuclei via (α\, n) reactions are of particular interest in this context. Despite the existence of experimental data and libraries\, they show large discrepances and they are not compatible with the declared uncertainties. In addition\, such libraries are only available for a few isotopes\, and the spectroscopic information available is limited. The need for new measu rements with higher precision has been recently recognized [1]. This work is focused on the reaction 27Al(α\, n)30P \, which served as a benchmark to compare measurements from previous experiments and cross check experime ntal techniques. The measurements are part of a larger project\, the Spani sh MANY collaboration (Measurement of Alpha Neutron Yields)\, whose ultima te goal is the measurement of (α\, xn) production yields\, reaction cross -sections and neutron energy spectra. Here we focus in particular on the m easurement of 27Al(α\, n) reaction yields via activation and 27Al(α\, n γ) production yields. One of the objectives of this work is the commissio ning of the new experimental beamline and of the detector systems via a pr eviously measured 27Al(α\, n)30P reaction. The experiment was carried in two independent beam times at the CMAM (Centro de Micro-Análisis de Mater iales) laboratory in Madrid [2]\, Spain using an array of ten LaBr3(Ce) FA TIMA-type [3] detectors placed at selected angles in the laboratory frame. The gamma spectroscopy measurements allow to determine the total reaction yield from the decay of the activation products and the (α\, nγ) yield from the de-excitation of the states in the target nuclei. The setup was c omplemented by a high-resolution HPGe detector to aid gamma-ray identifica tion.\nThe presentation will address the thick-target yields obtained by a ctivation in the 5 to 15 MeV energy range\, the gamma yields resulting for the 27Al(α\, nγ) reaction as a function of energy\, and the effect of a ngular correlations on the experimentally obtained gamma yields.\n\n**Refe rences.**\n[1] S. Westerdale et al.\, Tech. Report INDC (2022) NDS-0836\n[ 2] A. Redondo-Cubero et al.\, Eur. Phys. J. Plus 136 (2021) 175\n[3] V. Ve dia et al.\, Nucl. Instrum. Methods A 857 (2017) 98\n\nhttps://indico.ific .uv.es/event/7332/contributions/23122/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23122/ END:VEVENT BEGIN:VEVENT SUMMARY:Establishing the deformation characteristics of $^{66}$Ge DTSTART;VALUE=DATE-TIME:20240528T173000Z DTEND;VALUE=DATE-TIME:20240528T190000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23134@indico.ific.uv.es DESCRIPTION:Speakers: Nikita Bernier (Department of Physics & Astronomy\, University of the Western Cape)\nK. J. Abrahams\,1 J. N. Orce\,1\, 2 L. P. Gaffney\,3\, 4 D. G. Jenkins\,5\, 1 \nT. R. Rodríguez\,6 N. Bernier\,1\, ∗ E. H. Akakpo\,1\, 7 G. de Angelis\,8 \nM. J. G. Borge\,4 A. Brown\,5 D. T. Doherty\,9 P. E. Garrett\,10\,1 S. Giannopoulos\,4 \nK. Johnston\,4 M. Kumar Raju\,1\, 11 E. J. Mart´ın Montes\,1 D. L. Mavela\,1 \nS. Masan go\,1 C. V. Mehl\,1 D. R. Napoli\,12 B. S. Nara Singh\,13 C. Ngwetsheni\,1 \nS. S. Ntshangase\,7 G. G. O’Neill\,1 P. Spagnoletti\,13 G. Rainovski\ ,14 \nF. Recchia\,15\, 16 R. Wadsworth\,5 N. Warr\,17 and R. Zidarova4\, 1 4\n1Department of Physics & Astronomy\, University of the Western Cape\, P /B X17\, Bellville\, 7535 South Africa\n2National Institute for Theoretica l and Computational Sciences (NITheCS)\, South Africa \n3Department of Phy sics\, University of Liverpool\, Liverpool L69 7ZE\, United Kingdom 4ISOLD E\, CERN\, 1211 Geneva 23\, Switzerland\n5School of Physics\, Engineering and Technology\, University of York\, Heslington\, York YO10 5DD\, United Kingdom\n6Departamento de Estructura de la Materia\, Física Térmica y El ectr´énica and IPARCOS\, Universidad Complutense de Madrid\, E-28040\, M adrid\, Spain\n7Department of Physics & Engineering\, University of Zulula nd\, P/B X1001\, KwaDlangezwa 3886\, South Africa\n8INFN\, Laboratori Nazi onali di Legnaro\, I-35020 Legnaro\, Italy \n9Department of Physics\, Univ ersity of Surrey\, Guildford GU2 7XH\, United Kingdom 10Department of Phys ics\, University of Guelph\, Guelph N1G 2W1 Ontario\, Canada\n11iThemba LA BS\, National Research Foundation\, P.O. Box 722\, Somerset West 7129\, So uth Africa\n12Istituto Nazionale di Fisica Nucleare\, Laboratori Nazionali di Legnaro\, I-35020 Legnaro\, Italy\n13School of Computing\, Engineering and Physical Sciences\, University of the West of Scotland\, Paisley\, PA 1 2BE\, United Kingdom\n14Faculty of Physics\, St. Kliment Ohridski Univer sity of Sofia\, 1164 Sofia\, Bulgaria \n15Dipartimento di Fisica e Astrono mia\, University degli Studi di Padova\, I-35131 Padova\, Italy \n16INFN\, Sezione di Padova\, I-35131 Padova\, Italy\n17Institute for Nuclear Physi cs\, University of Cologne\, Cologne 50937\, Germany\n\nThe presence of bo th well-deformed prolate and oblate deformations is expected in the A ≈ 70 mass region because of the surprisingly large single-particle energy ga ps at N = 34. Nonetheless\, oblate deformations in this region have mostly been inferred from rotational bands (68Se [1]) or model-dependent decay m easurements (72Kr [2]). Only recently\, Coulomb-excitation measurements ha ve been able to determine the sign of the quadrupole moment in a few proto n-rich nuclei in this region\; conclusively prolate in 74\,76Kr [3] and sl ightly oblate in 70Se [4\,5]\, although with large uncertainties. As infer red for 68Se\, the N = 34 isotone 66Ge is another candidate to possess a l arge oblate deformation in its ground state.\nThe measurement of the spect roscopic quadrupole moment for the first 2+ excitation\, Q(2+) and shape c oexistence in the neutron-deficient isotope of 66Ge have been investigated using the 196Pt(66Ge\,66Ge*)196Pt* Coulomb-excitation reaction at 4.395 M eV/u with the MINIBALL spec-trometer and double-sided silicon detectors. T o accurately determine the beam purity\, the beam was implanted on an alum inium foil and let to decay. Here\, we present results from the analysis o f the Coulomb-excitation and β-decay data sets\, which suggest a strong o blate collectivity with a large E2 strength and a potentially large oblate deformation. As found in previous work [3\,6]\, the triaxial degree of fr eedom seems to be relevant\, as also inferred in this work from beyond mea n-field calculations where the collective wave functions go from soft in t he ground state to a well-defined minimum as the angular momentum increase s.\n\n[1]S. M. Fischer et al.\, Phys. Rev. Lett. 84\, 4064 (2000).\n[2]J. A. Briz et al.\, Phys. Rev. C 92\, 054326 (2015).\n[3]E. Clément et al.\, Phys. Rev. C 75\, 054313 (2007).\n[4]J. Ljungvall et al.\, Phys. Rev. Let t. 100\, 102502 (2008).\n[5]A. M. Hurst et al.\, Phys. Rev. Lett. 98\, 072 501 (2007).\n[6]A. Obertelli et al.\, Phys. Rev. C 80\, 031304(R) (2009).\ n\nhttps://indico.ific.uv.es/event/7332/contributions/23134/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23134/ END:VEVENT BEGIN:VEVENT SUMMARY:Studying the structure of Li-11 via transfer reactions DTSTART;VALUE=DATE-TIME:20240528T173000Z DTEND;VALUE=DATE-TIME:20240528T190000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23135@indico.ific.uv.es DESCRIPTION:Speakers: Daniel Fernandez Ruiz (IEM-CSIC)\nThe term "halo nuc leus" was coined to describe nuclei exhibiting an unusually large spatial extension\, deviating from the standard formula r=r$_o$​⋅A$^{1/3}$. Th e initial empirical observation of this phenomenon arose from scattering e xperiments involving\, among others\, lithium isotopes [1]. These experime nts\, designed to measure the interaction cross-section of neutron-rich nu clei\, revealed a significant increase in cross-section as we approach the neutron dripline when going from $^9$Li to $^11$Li.This discovery led to the interpretation of a new type of nuclear structure [2]\, characterized by a compact core and an external set of nucleons (1n for $^{11}$Be and 2n for $^{11}$Li). Subsequent momentum distribution studies of $^{9}$Li from $^{11}$Li break-up experiments confirmed this hypothesis [3].\n\nOur focu s is on the $^{11}$Li isotope\, considered the quintessential two-neutron halo. While the ground state of $^{11}$Li is well established [4]\, the sa me cannot be said about its excitation spectrum\, despite multiple experim ental attempts [4]\; there is no consensus over the energy and number of e xcited states. Most of these experimental attempts are based on promoting an $^{11}$Li nucleus from the ground state to its excited states through r eactions\, with the only exceptions being [5] and [6]\, which suffer from a complex experimental setup.\n\nWe are undertaking a new experiment to po pulate the excited states of $^{11}$Li using the $^9$Li(t\,p)$^{11}$Li rea ction\, as the structure of $^{9}$Li is simpler [7]. The experiment\, sche duled for 2024\, will take place at the Scattering Experiment Chamber (SEC ) at CERN-ISOLDE in Switzerland. Our state-of-the-art setup consists of a central tritium target surrounded by a system of five telescopes (PAD+DSSD ) forming a pentagon around the target\, covering both forward and backwar d angles. The pentagons are complemented by a system of silicon discs and an S3 at the back\, along with an S3-S5 telescope at the front\, maximizin g angular coverage. \n\nThe tritium target will receive a $^{9}$Li beam wi th an energy of 72 MeV/nucleon\, populating the excited structure of $^{11 }$Li through the $^{9}$Li(t\,p)$^{11}$Li reaction. Information on the exci ted states will be gathered from the emitted proton\, which will be detect ed by our setup. To process the data\, our DAQ employs compact digitizer c ards (64 channels per card) developed by Mesytec. These cards handle all e lectronic readouts while requiring only two cables (optical link and power )\, making the setup extremely compact (only six cards are needed).\n\nIn this contribution\, we present Geant4-MC simulations of the setup and disc uss the status of our setup\, which is nearing completion.\n\n\n\n**Refren ce**\n\n[1] I. Tanihata et al.\, Phys. Rev. Lett. 55 (1985) 2676.\n\n[2] P .G. Hansen and B. Jonson\, Europhys. Lett. 4 (1987) 409.\n\n[3] T. Kobayas hi et al.\, Phys. Rev. Lett. 60 (1988) 2599.\n\n[4] R. Kubota et al.\, Nuc l. Phys. Rev. Lett. 125 (2020) 252501.\n\n[5] H.G. Bohlen et al.\, Z. Phys . Lett. B 351 (1995) 7.\n\n[6] M.G. Gornov\, Phys. Rev. Lett. 81 (1998) 43 25.\n\n[7] M.J.G. Borge and J. Cederkäl\, Proposal 597 to the ISOLDE and Neutron Time-of-Flight Committee (2021)\, European Organization for Nuclea r and Particle Physics.\n\nhttps://indico.ific.uv.es/event/7332/contributi ons/23135/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23135/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of exotic nuclei of interest for applied and fundamental nuc lear physics with Total Absorption Gamma Spectroscopy (TAGS) DTSTART;VALUE=DATE-TIME:20240528T173000Z DTEND;VALUE=DATE-TIME:20240528T190000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23137@indico.ific.uv.es DESCRIPTION:Speakers: Julien Pépin (CSIC-IMT Atlantique)\nThe study of be ta decay of neutron rich nuclei is particularly important for many fields in fundamental and applied physics[1]. In nuclear reactors\, fission produ cts\, through their decays\, produce an additional power called decay heat [5]. The assesment of this energy is essential for nuclear safety since it represents around 7% of the power in an operating reactor and these deca ys continue after reactor shutdown. Beta decay leads to antineutrino emmis sion and is thus a good tool for fundamental neutrino research[6] but it c an also be used for non-proliferation purposes since the antineutrino flux reflects the reactor power and the fuel content. In nuclear astrophysics\ , the r-process is a nucleo-synthesis process[3] at the origin of half of the nuclei heavier than iron. It takes place in hot (T~10⁹K) and highly neutron-dense environments. This process is based on the competition betwe en neutron capture (n\,γ)\, photo-dissociation (γ\,n) reactions and beta decays. A precise knowledge of the beta properties can constrain the theo retical models used to understand this nucleo-synthesis process. Some of t he nuclei involved in these fields of nuclear physics are affected by the pandemonium effect[4]: due to the low efficiency of high-resolution detect ors\, such as germanium (HPGe)\, at high gamma energies\, some gamma-rays and the corresponding high energy levels can be missed in the decay data l eading to a distortion of the beta decay feeding.\n\n New measurements of relevant nuclei for the above mentioned topics have been performed at t he IGISOL facility (Jyväskylä\, Finland) in September 2022\, using Total Absorption Gamma Spectroscopy (TAGS) technique[2]. TAGS is complementary to high resolution gamma-ray spectroscopy and employs a calorimeter to mea sure the total gamma intensity de-exciting each level of the daughter nucl eus providing a direct measurement of the beta feeding. The setup is based on the Rocinante detector\, a multi-segmented detector made of 12 barium fluorine (BaF2) crystals\, a beta detector acting as a trigger\, and a cer ium bromine (CeBr3) crystal for identification of contaminants.\n\n The topic of the presentation will be the introduction of Pandemonium effect and the solution our groups choosed to circumvent this effect. Preliminary results of the analysis of the I241 experiment will be presented.\n\nRefe rences\n[1] A.Algora et al. "Beta-Decay Studies for Applied and Basics Nuc lear Physics". In: The European Physical Journal A (2021).\n[2] A.Algora e t al. "Total absorption spectroscopy measurements for the prediction of th e reactor antineutrino spectra" . Ed. by Proposal to the PAC of J¸vask¸l a.\n[3] E.M.Burbidge et al. "Synthesis Of The Elements In Stars". In: Revi ew Of Modern Physics\, Volume 29\, Number 4 (1957).\n[4] J.C.Hardy et al. "The Essential Decay Of Pandemonium: A Demonstration Of Errors In Complex Beta-Decay Schemes". In: Physics Letters Volume 71B\, number 2 (1977).\n[5 ] J.C.Nimal. "Physique Nucléaire Et Sûreté Des Réacteurs" . Ed. by CLE FS CEA N° 45. 2001.\n[6] M.Estienne et al. " Updated Summation Model: An Improved Agreement with the Daya Bay Antineutrino Fluxes". In: (2019).\n\n https://indico.ific.uv.es/event/7332/contributions/23137/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23137/ END:VEVENT BEGIN:VEVENT SUMMARY:Superscaling analysis of inclusive electron and (anti)neutrino sca ttering within the coherent density fluctuation model DTSTART;VALUE=DATE-TIME:20240528T173000Z DTEND;VALUE=DATE-TIME:20240528T190000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23143@indico.ific.uv.es DESCRIPTION:Speakers: Martin Ivanov (Institute for Nuclear Research and Nu clear Energy\, Bulgarian Academy of Sciences\, Sofia 1784\, Bulgaria)\nThe experimental data from quasielastic electron and (anti)neutrino scatterin g on $^{12}$C are reanalyzed in terms of a new scaling variable $\\psi^*$ suggested by the interacting relativistic Fermi gas with scalar and vector interactions\, which is known to generate a relativistic effective mass f or the interacting nucleons. We construct a new scaling function $f^\\text {QE}(\\psi^*)$ for the inclusive lepton scattering from nuclei within the coherent density fluctuation model (CDFM). The latter is a natural extensi on of the relativistic Fermi gas model to finite nuclei. In this work\, on the basis of the scaling function obtained within CDFM with a relativisti c effective mass $m_N^* =0.8 m_N$\, we calculate and compare the theoretic al predictions with a large set of experimental data for inclusive ($e\,e' $) and (anti)neutrino cross sections. The model also includes the contrib ution of weak two-body currents in the two-particle two-hole sector\, eval uated within a fully relativistic Fermi gas. Good agreement with experimen tal data is found over the whole range of electron and (anti)neutrino ener gies.\n\nhttps://indico.ific.uv.es/event/7332/contributions/23143/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23143/ END:VEVENT BEGIN:VEVENT SUMMARY:Pair condensation in excited states of neutron-rich nuclei DTSTART;VALUE=DATE-TIME:20240528T173000Z DTEND;VALUE=DATE-TIME:20240528T190000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23145@indico.ific.uv.es DESCRIPTION:Speakers: Theodor Popa (Horia Hulubei National Institute of Ph ysics and Nuclear Engineering)\nRecently we have analysed two types of exc ited states generated from a ground state described by a pair condensate [ 1]. \nOne type is obtained by breaking a pair from the ground state conden sate and replacing it by ”excited” collective pairs built on time-reve rsed single-particle orbits. The second type is described by a condensate of identical excited pairs. The structure of these excited states is anal ysed for the valence neutrons of $^{108}$Sn. For a state-dependent pairing interaction\, the first type of excited states agree well with the J=0 st ates which are known in $^{108}$Sn. \n The states corresponding to the exc ited pair condensate (EPC) appear at low \nenergies\, around the energy of the second excited state of the first type\, and they do not have a simpl e correspondence with the exact eigenstates of the pairing Hamiltonian. At a much higher excitation energy\, of about 20 MeV\, we have found an EPC state which is similar in structure to an exact eigenstate. It is shown th at this EPC state has features in common with a giant pairing vibration. \ n\n[1] Th. Popa\, N. Sandulescu\, and M. Sambataro\, Phys. Rev. C 107 (202 3) 034318\n\nhttps://indico.ific.uv.es/event/7332/contributions/23145/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23145/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrinoless double beta decay in the relativistic framework DTSTART;VALUE=DATE-TIME:20240528T165000Z DTEND;VALUE=DATE-TIME:20240528T171000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23086@indico.ific.uv.es DESCRIPTION:Speakers: Pengwei Zhao (PEKING UNIVERSITY )\nThe neutrinoless double beta decay is of fundamental importance for particle physics\, nucl ear physics\, and cosmology. Nuclear matrix element\, which encodes the im pact of the nuclear structure on the decay half-life\, is crucial to inter preting the experimental limits and even more potential future discoveries . However\, current knowledge of the nuclear matrix element is not satisfa ctory due to the unknown short-range contributions to the transition opera tor [1] and also the complicated nuclear many-body wavefunctions [2].\n\nF or the transition operator\, we have developed a relativistic framework ba sed on a manifestly Lorentz-invariant chiral Lagrangian [3]. We show that the neutrinoless double-beta decay transition amplitude can be renormalize d at leading order without any unknown short-range operators [4]. This ena bles a model-free determination of the neutrinoless double beta decay oper ator in nuclear-structure calculations. It also defines a stringent benchm ark for the previous estimation of the unknown short-range contributions i n the nonrelativistic framework. \n\nFor the nuclear many-body wavefuncti ons\, we have established the relativistic configuration-interaction densi ty functional theory [5\,6]\, a novel framework which combines the advanta ges of nuclear shell model and relativistic density functional theory. It allows a fully microscopic and self-consistent treatment of nuclear triaxi ality within a full model space. It provides the first investigation for t he triaxial effects on the nuclear matrix elements for both two-neutrino a nd neutrinoless double beta decays in 76Ge [7]. The triaxiality enhances t he nuclear matrix element of the neutrinoless double beta decay significan tly by a factor around two.\n\n\n[1] V. Cirigliano\, et al.\, Phys. Rev. L ett. 126\, 172002 (2021).\n[2] J. Engel and J. Menéndez\, Rep. Prog. Phys . 80\, 046301 (2017).\n[3] Y. L. Yang and P. W. Zhao\, Phys. Lett. B 835\, 137587 (2022).\n[4] Y. L. Yang and P. W. Zhao\, arXiv:2308.03356\n[5] P. W. Zhao\, P. Ring\, and J. Meng\, Phys. Rev. C 94\, 041301(R) (2016)\n[6] Y.K. Wang\, P.W. Zhao\, and J. Meng\, Phys. Lett. B 848\, 138346 (2024)\n[ 7] Y.K. Wang\, P.W. Zhao\, and J. Meng\, arXiv:2304.12009\n\nhttps://indic o.ific.uv.es/event/7332/contributions/23086/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23086/ END:VEVENT BEGIN:VEVENT SUMMARY:First laser-spectroscopy measurements across N = 32 in the calcium isotopic chain DTSTART;VALUE=DATE-TIME:20240528T161000Z DTEND;VALUE=DATE-TIME:20240528T163000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23118@indico.ific.uv.es DESCRIPTION:Speakers: Tim Lellinger (CERN)\n*On behalf of the COLLAPS coll aboration*\n\nOver a decade ago\, the first experimental evidence for the N=32 sub shell closure in the calcium isotopic chain emerged [1\,2]. Subse quent experimental and theoretical investigations have confirmed this find ing. However\, in laser spectroscopy measurements extending up to $^{52}$C a (N=32)\, no indications of this shell gap were apparent [3]. Crossing th e shell gap with laser spectroscopy setups has proved difficult due to the simultaneous requirement of a sensitivity of approximately 10 ions/s and a measurement uncertainty on the order of MHz.\n\nThis contribution presen ts the first laser spectroscopy measurements of $^{53}$Ca\, facilitated by an extension of the collinear laser spectroscopy technique employed at th e COLLAPS setup at ISOLDE/CERN. This technique\, termed as *radioactive de tection after optical pumping and state selective charge exchange* (ROC)\, combines the high sensitivity of a particle detection scheme with the hig h resolution of low-power\, continuous wave lasers utilized in a collinear geometry. The methodology of this technique will be explained\, followed by the presentation and discussion of preliminary values for the charge ra dius and magnetic dipole moment of $^{53}$Ca in the context of the robustn ess of the N=32 sub shell closure\, as well as the prospects to measure $^ {54}$Ca.\n\n[1] Wienholtz\, F. et al. Nature vol. 498\, 346-349 (2013)\n\n [2] Steppenbeck\, D. et al. Nature vol. 502\, 207-210 (2013)\n\n[3] R.F. G arcia Ruiz et al\, Nature Physics vol. 12\, 594-598 (2016)\n\nhttps://indi co.ific.uv.es/event/7332/contributions/23118/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23118/ END:VEVENT BEGIN:VEVENT SUMMARY:Comparison of 18O+12C at 16.7 MeV/nucleon reaction with the AMD+GE MINI++ model. DTSTART;VALUE=DATE-TIME:20240528T143000Z DTEND;VALUE=DATE-TIME:20240528T145000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23126@indico.ific.uv.es DESCRIPTION:Speakers: Lucia Baldesi (Dipartimento di Fisica ed Astronomia Università di Firenze)\nIn this talk I will present a comparison between the experimental data and the transport model AMD [1] (Antisymmetrized Mol ecular Dynamics) coupled with GEMINI++ as afterburner[2] for the reaction $^{18}$O+$^{12}$C at 16.7 MeV/nucleon measured using the GARFIELD+RCo [3] apparatus at LNL.\nConsidering some recent systematics [4\,5]\, in our sys tem the statistical process are only a small part of the total cross secti on and the presence of dynamical effects in systems with a similar bombard ing energy has been already shown in [6]. On the other hand\, the bombardi ng energy and the size of this system is such that we are still not comple tely in the energetic and mass regime where a dynamical code has been comp ared and fully validated through the experimental data comparison. \nThe a im of this comparison is to test for the first time the AMD code at low en ergy (below 25 MeV/nucleon) with a light system. This work has shown that AMD+GEMINI++ is able to predict all the different mechanisms from which fr agments can be produced\, but with different cross sections with respect t o the experimental ones. In particular\, AMD+GEMINI++ fails in populating the velocity region close to the center of mass velocity as already pointe d out in [7] for the light systems $^{32}$S + $^{12}$C and $^{20}$Ne + $^{ 12}$C at 25 MeV/nucleon and 50 MeV/nucleon. The fact that the model prefer s less dissipative reactions\, where the QP and the QT stay too much simil ar to the original projectile and target\, might be related to the NN cros s section or to the clustering and inter-clustering process. A possible op timization of these parameters within AMD to better reproduce also light s ystems with this code is foreseen.\n\n[1] A. Ono et al.\, Phys. Rev. C 59\ , 853 (1999).\n[2] R. J. Charity\, Phys. Rev. C 82\, 014610 (2010).\n[3] M . Bruno et Al.\, Eur. Phys. J. A 49\, 128 (2013). \n[4] P. Eudes et al. Ph ys. Rv. C 90\, 034609 (2014).\n[5] D. Dell’Aquila et al.\, J. Phys. G: N ucl. Part. Phys. 50 (2023) 015101\n[6] S.Piantelli et al.\, Phys. Rev. C 9 6\, 034622 (2017)\n[7] C. Frosin et al.\, Phys. Rev. C 107\, 044614 (2023) .\n\nhttps://indico.ific.uv.es/event/7332/contributions/23126/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23126/ END:VEVENT BEGIN:VEVENT SUMMARY:Alpha structure of 16O at high excitation energies by 3He+13C nucl ear reactions DTSTART;VALUE=DATE-TIME:20240528T141000Z DTEND;VALUE=DATE-TIME:20240528T143000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23120@indico.ific.uv.es DESCRIPTION:Speakers: Ivano Lombardo (Univ. di Catania and INFN-Sezione di Catania)\n3He induced reactions allow to investigate the spectroscopy of high excitation energy regions of light compound nuclei that can be formed in low energy reactions. We performed a new experiment of this type\, HEL ICA\, with the solid-state hodoscope OSCAR at the AN-2000 accelerator of t he INFN-LNL. In the experiment\, a 3He beam\, with energies ranging from a bout 1400 keV to 2200 keV was delivered to a thin 13C target. In particula r\, 13C(3He\,alpha)12C reactions\, leading to the C nucleus into several e xcited states (including the Hoyle state)\, were correctly identified. In the talk\, we show preliminary angular distributions and excitation functi ons of the cross section for the 13C(3He\,a0)\, 13C(3He\,a1)\, 13C(3He\,a2 ) reactions in a broad angular domain\, and discuss the impact on the spec troscopy of 16O. The preliminary values of the branching ratios between th e transitions populating the ground state and the Hoyle state show an ener gy dependence that suggest the occurrence of a strongly clustered state in 16O at about 24 MeV excitation energy.\n\nhttps://indico.ific.uv.es/event /7332/contributions/23120/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23120/ END:VEVENT BEGIN:VEVENT SUMMARY:Beta-decay as a probe of the isospin doublet in 8Be DTSTART;VALUE=DATE-TIME:20240528T135000Z DTEND;VALUE=DATE-TIME:20240528T141000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23075@indico.ific.uv.es DESCRIPTION:Speakers: Maria Jose Garcia Borge (ISOLDE-CERN)\nSince the mid -60s\, the presence of a 2$^+$ doublet in $^8$Be\, constituted by the 16.6 and 16.9 MeV excited states\, has been observed [1-3]. An intriguing aspe ct of this doublet is its status as the best-known instance featuring a co mplete isospin mixing\, where the 16.6 MeV ($^7$Li+p) and 16.9 MeV ($^7$Be +n) levels can be decomposed in an equal mixture of two pure isospin (T=0 and T=1) levels [4]. While indications of this behaviour have hinted throu gh R-Matrix fits in reaction experiments [5]\, direct confirmation is stil l pending.\n\nThe 2$^+$ isospin doublet in $^8$Be\, comprising the 16.6 an d 16.9 MeV excited states\, has been consistently observed [1-3] since the mid-1960s\, through reaction experiments. Notably\, this doublet stands o ut as the most well-known instance of a total isospin mixing\, where the 1 6.6 MeV ($^7$Li+p) and 16.9 MeV ($^7$Be+n) levels exhibit an equal mixture of two pure isospin (T$=0$) and (T$=1$) states [4]. While R-Matrix fits i n reaction experiments have hinted at this behaviour [5]\, direct confirma tion remains pending.\n\nThe beta decay of the 1-proton halo nucleus $^8$B into $^8$Be offers a valuable avenue for probing the isospin composition of the doublet through selective Fermi and Gamow-Teller components. Howeve r\, resolving the feeding to the 2$^+$ doublet poses challenges. Within th e Q$_{\\text{EC}}$ window (Q$_{\\text{EC}}$ = 17.9798(1)\\) MeV)\, the pre dominant ($\\geq$ 88 %) decay mode leads to a broad \\(2$^+$) state at 3 M eV [6]\, extensively studied due to its significance as a primary source o f high-energy solar neutrinos [7]. Additionally\, beta decay can occur via electron capture (EC) at 17\,640 MeV. Assuming the EC decay occurs in the core with the halo proton as a spectator\, the strength of this unobserve d branch is estimated from the decay of $^7$Li to be a branching ratio of \\(2.3 $*$ 10$^{-8}$)[8].\n\n\nThe IS633 experiment\, conducted by the MAG ISOL collaboration at the CERN/ISOLDE facility's decay station (IDS)\, is focused on investigating the 2$^+$ doublet of $^8$Be through the beta deca y of $^8$B [9\,10]. A mass-separated 50 keV $^8$BF$_2$ beam was implanted in a (30\, $\\text{mg/cm}^2$) carbon foil catcher. Through EC/($\\beta^+$) decay\, $^8$B feeds the excited states of $^8$Be\, which subsequently bre ak up into two $\\alpha$ particles or a proton and a $^7$Li\, depending on the level fed. Detection of the breakup fragments is done through a syste m of particle telescopes\, each comprising a Double-Sided Silicon Strip De tector (DSSD) stacked with a thick Si-PAD detector. These telescopes\, arr anged in pairs of opposite-facing detectors\, enabled precise data collect ion.\n\nIS633 represents a significant advancement\, achieving a two-order -of-magnitude improvement in statistics over the preceding benchmark exper iment JYFL08 [9]. High-statistics data from IS633 enabled the resolution o f the continuum spectrum of $^8$Be from 1 MeV up to 17 MeV. Notably\, the 16.6 MeV and 16.9 MeV doublet were resolved for the first time in a beta d ecay study.\n\nThis contribution provides a comprehensive description of e xperiment IS633\, including the analysis of excitation spectra using R-mat rix methods and an alternative approach based on beta recoil. These comple mentary analyses have facilitated the determination of isospin mixing in t he doublet and the identification of the Fermi and Gamow-Teller components .\n\n**Refrences**\n\n[1] F.C. Gilbert\, Phys. Rev. 93 (1954) 499.\n\n[2] B.J. Farmer et al.\, Nucl. Phys 15 (1960) 626.\n\n[3] E. Matt et al.\, Phy s. Lett. 9 (1964) 174.\n\n[4] T. Nilsson et al.\, Hyperfine Int 129 (2000) 67.\n\n[5] C.P. Browne et al.\, Phys. Lett. 23 (1966) 371.\n\n[6] P. von Brentano\, Physics Reports 264 (1996) 57.\n\n[7] J.N. Bahcall and C. Peña -Garay\, New Journal of Physics 6 (2004) 63.\n\n[8] M.J.G. Borge et al.\, J. Phys. G 40 (2013) 035109.\n\n[9] O. Kirsebom et al.\, Phys. Rev. C 83 ( 2011) 065802.\n\n[10] S. Viñals\, PhD thesis. Complutense University of M adrid (2020).\n\nhttps://indico.ific.uv.es/event/7332/contributions/23075/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23075/ END:VEVENT BEGIN:VEVENT SUMMARY:Investigating cluster structures in the A=10 mass region via $^{10 }$B + $^{10}$B nuclear reactions DTSTART;VALUE=DATE-TIME:20240528T133000Z DTEND;VALUE=DATE-TIME:20240528T135000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23098@indico.ific.uv.es DESCRIPTION:Speakers: Deša Jelavić Malenica (Rudjer Boskovic Institute)\ nReveling the details of different states in light nuclei and gaining a co mplete spectroscopic picture of nuclei close to the A=10 is important for many reasons. In this mass region states of dominantly shell model charac ter are mixed with molecular and cluster states\, including rather exotic ones\, like Borromean (e.g. 9Be) and halo (e.g. 11Be) states\, or even Bos e-Einstein condensates (11\,12C\, 11B).\nThe nuclei of interest have been accessible by ab initio calculations for some time\, so they can serve as a testing ground for improving the corresponding models. Furthermore\, man y of the states close to the A=10 region are important inputs to astrophys ical and cosmological models\, since light nuclei occur in early nucleosyn thesis and every phase of stellar evolution.\n\nThe high-energy region of these nuclei exhibits a dense concentration of states with significant ove rlap\, posing a particular challenge for investigation. Well-defined state s preferentially populated in specific experimental channels within this h igh-energy region not only offer insights into structural characteristics but also serve as compelling evidence thereof. While reaching high-spin st ates is not always feasible\, the unique conditions of the experiment pres ented here\, allow for the population of such states in the exit channels. \n\nResults of nuclear reactions 10B + 10B\, measured at 72 MeV\, will be presented\, the most important being new and rarely seen states in the 12C and 13C [1\, 2]\, which motivate targeted future experiments. In particul ar\, a new state of 12C at Ex = 24.4 MeV is strongly populated in the trip le α-particle coincidences\, while the rarely seen state at Ex = 30.3 MeV is found to be strong in the d+10B decay channel\, reinforcing the previo us suggestions that it has the exotic 2α+2d molecular structure [3]. Rega rding the 13C nucleus\, a potentially novel state at Ex = 19.0 MeV is prom inently observed in α+9Be coincidences and demonstrates a well-defined cl uster structure. Furthermore\, so far unobserved alpha decay of two high-e nergy 13C states at 21.9 and 23.6 MeV is discussed.\n\nIn four nucleons tr ansfer reaction channel\, excited states of the 14N at Ex = 13.2 and 15.39 MeV were measured. Both of them fit nicely to a recent AMD calculations [ 4] as the head and the 5+ state of the 10B(3+) + α rotational band (Kπ = 3+).\n\nLastly\, the unique opportunity presented by 10B + 10B reactions to study high-energy\, high-spin states in mirror nuclei pairs such as 9Be -9B\, 10Be-10C and 11B-11C is explored. Mirror pairs provide information a bout the charge independence of the nuclear force\, and\, in certain cases \, the Coulomb displacement energy (via so-called Thomas-Ehrman effect)\, that can lead to a better understanding of underlying nuclear structure. T he experimental data on cluster states in light mirror nuclei are still ve ry rare\, though it is clear that they can provide very useful insights. \ n\n[1] - D. Jelavić Malenica et al.\, Phys. Review C 99 064318 (2019) \n [2] - D. Jelavić Malenica et al.\, Eur. Phys. J. A 59 228 (2023)\n[3] - M iljanić Đ. et. al.\, Zeitschrift für Physik A 312\, No. 3 (1983) 267\n[ 4] - Kanada-En’yo\, Y.\, Phys. Rev. C 92\, 064326 (2015)\n\nhttps://indi co.ific.uv.es/event/7332/contributions/23098/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23098/ END:VEVENT BEGIN:VEVENT SUMMARY:Reaction dynamics and nuclear structure of light exotic nuclei DTSTART;VALUE=DATE-TIME:20240528T130000Z DTEND;VALUE=DATE-TIME:20240528T133000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23759@indico.ific.uv.es DESCRIPTION:Speakers: Alessia Di Pietro (INFN-Laboratori Nazionali del Sud )\nThe nuclear chart corresponding to light radioactive nuclei has yielded many surprising results\, among others\, the discovery of the halo struct ures in neutron and proton dripline nuclei. This region of the nuclear cha rt is also rich of many other phenomena like the appearance of molecular-l ike structures where $\\alpha$-particle-clusters are bound together by the exchange of neutrons or the existence of cluster configurations where at least one of the clusters is a weakly bound nucleus.\n\nThis presentation will focus on the investigation of these particular features of the nuclea r structure of light radioactive nuclei and how they influence the reactio n dynamics. The availability of post-accelerated radioactive ion beams has opened new opportunities for such studies\; future perspectives will also be discussed.\n\nhttps://indico.ific.uv.es/event/7332/contributions/23759 / LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23759/ END:VEVENT BEGIN:VEVENT SUMMARY:Reaction dynamics of proton drip-line nuclei at energies around th e Coulomb barrier DTSTART;VALUE=DATE-TIME:20240528T111000Z DTEND;VALUE=DATE-TIME:20240528T113000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23074@indico.ific.uv.es DESCRIPTION:Speakers: Lei Yang (China Institute of Atomic Energy)\nReactio n dynamics induced by proton drip-line nuclei at energies around the Coulo mb barrier is one of the most popular topics in nuclear physics. In order to further investigate the reaction mechanisms of proton drip-line nuclei\ , we performed the complete-kinematics measurements of $^8$B+$^{120}$Sn an d $^{17}$F+$^{58}$Ni at CRIB\, University of Tokyo. Two detector arrays\, i.e.\, the silicon telescope array of STARE and the ionization chamber arr ay of MITA\, were designed respectively for the measurements of $^8$B and $^{17}$F. Reaction products were completely identified with the help of th ese two arrays. For the $^8$B+$^{120}$Sn system\, the coincident measureme nt of the breakup fragments was achieved for the first time. The correlati ons between the breakup fragments reveal that the prompt breakup occurring on the outgoing trajectory dominates the breakup dynamics of $^8$B. For $ ^{17}$F+$^{58}$Ni\, nearly the exhaustive information on reaction channels \, such as quasi-elastic scattering\, breakup and total fusion\, was deriv ed for the first time. An enhancement of the fusion cross section of $^{17 }$F+$^{58}$Ni was observed at the energy below the Coulomb barrier. Theore tical calculations indicate that this phenomenon is mainly due to the coup ling to the continuum states. Moreover\, different direct reaction dynamic s were found in $^8$B and $^{17}$F systems\, suggesting the influence of p roton-halo structure on the reaction dynamics.\n\nhttps://indico.ific.uv.e s/event/7332/contributions/23074/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23074/ END:VEVENT BEGIN:VEVENT SUMMARY:The kink effect of the nuclear charge radius in mean-field relativ istic models DTSTART;VALUE=DATE-TIME:20240528T105000Z DTEND;VALUE=DATE-TIME:20240528T111000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23131@indico.ific.uv.es DESCRIPTION:Speakers: Saturnino Marcos Marcos (Universidad de Cantabria)\, Mercedes López-Quelle (Universidad de Cantabria)\nThe significant altera tion in the trend of the nuclear charge radius within certain isotopic fam ilies\, when plotted against the mass number A\, is called the kink effect (KE). The most typical example of the KE is found in the charge radii of Pb isotopes. This kink is reasonably well reproduced by the nuclear relati vistic mean-field [1-4] and relativistic Hartree-Fock approximations [5]\, while non-relativistic Skyrme-Hartree-Fock (SHF) functionals with standar d parametrisations [6] or Gogny forces [7] fail to reproduce it. Thus\, ne w non-relativistic density functionals have been proposed to improve the d escription of the nuclear charge radii [8-16]\, trying to understand the m echanism responsible for the KE. However\, the entire theoretical understa nding has yet to be reached.\n This communication aims to give a detaile d and complete explanation of the KE in the most common relativistic model s in the mean-field approximation. To do this\, we analyse the contributio n of the valence neutrons to the proton central potential. We show that re lativistic effects due to the small component of the Dirac spinors are ess ential in the kink formation and also to achieve a good description of the charge radii in the lead isotopic family. We explain\, in particular\, wh y relativistic models tend to be more kinky than non-relativistic ones [16 ].\nReferences\n[1] M. M. Sharma\, G. A. Lalazissis\, P. Ring. Phys. Lett. B 317 (1993) 9.\n[2] S. Marcos\, L. N. Savushkin\, M. López-Quelle\, R. Niembro\, P. Bernardos\, Phys. Lett. B 507\, (2001) 135.\n[3] U. C. Perera \, A. V. Afanasjev\, and P. Ring\, Phys. Rev. C 104\, 064313 (2021).\n[4] U. C. Perera\, A. V. Afanasjev\, Phys. Rev. C 107\, 064321 (2023).\n[5] R. Niembro\, S. Marcos\, M. López-Quelle\, L. N. Savushkin\, Physics of Ato mic Nuclei 75\, (2012) 269.\n[6] N. Tajima\, P. Bonche\, H. Flocard\, P.-H . Heenen\, M. S. Weiss\, Nucl. Phys. A 551 (1993) 434.\n[7] T. Gonzalez-Ll arena\, J. L. Egido\, G. A. Lalazissis\, P. Ring\, Phys. Lett. B 379 (1996 ) 13.\n[8] P.-G. Reinhard and H. Flocard\, Nucl. Phys. A 584\, 467 (1995). \n[9] M. M. Sharma\, G. A. Lalazissis\, J. König\, P. Ring. Phys. Rev. Le tt. 74 (1995) 3744.\n[10] S. A. Fayans and S. V. Tolokonnikov\, E. L. Tryk ov\, and D.Zawischa\, Nucl. Phys. A 676\, 49 (2000).\n[11] M. Goddard\, P. D. Stevenson\, and A. Rios\, PRL 110\, 032503 (2013).\n[12] H. Nakada\, T. Inakura\, Phys. Rev. C 91 (2015) 021302(R).\n[13] P.-G. Reinhard and W. N azarewicz\, Phys. Rev. C 95\, 064328 (2017).\n[14] H. Nakada\, Phys. Rev. C 100\, 044310 (2019).\n[15] W. Horiuchi and T. Inakura\, Phys. Rev. C 105 \, 044303 (2022).\n[16] T. Naito\, T. Oishi\, H. Sagawa\, Z. Wang\, Phys. Rev. C 107\, 054307 (2023).\n\nhttps://indico.ific.uv.es/event/7332/contri butions/23131/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23131/ END:VEVENT BEGIN:VEVENT SUMMARY:Study of the 14B nuclear structure and the tensor force contributi on in the O isotopic chain using QFS reactions DTSTART;VALUE=DATE-TIME:20240528T103000Z DTEND;VALUE=DATE-TIME:20240528T105000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23105@indico.ific.uv.es DESCRIPTION:Speakers: Antoine Barrière (GANIL)\nThe motivations for study ing nuclei far from the valley of stability are manifold: from the study o f the role played by the different parts of the nuclear force in the evolu tion of shell gaps\, to the appearance of halo nuclei and clusters in a va riety of isotopic chains linked to the proximity of the continuum\, includ ing the reordering of the neutron/proton shells as we move toward the corr esponding drip line.\n\nAn experiment has been recently performed using th e R$^3$B setup at GSI\, within the FAIR Phase-0 program. Some of the scien tific goals are to study the role of the tensor force when approaching the neutron drip line and the complex facets of neutron rich boron isotopes s uch as the weakly bound halo nucleus candidate $^{14}$B. During this exper iment 2 different “cocktail” of nuclei\, among which $^{22}$O\, $^{14} $B and $^{15}$B were sent on a 5 cm LH2 target surrounded by tracking dete ctors and the CALIFA calorimeter [1]. This calorimeter allows to detect ga mma-rays and light particles from the QFS reactions in inverse kinematics. To study the spectroscopy of unbound states with an unprecedented energy resolution\, this new setup includes the high resolution and granularity n eutron detector NeuLAND [2].\n\nIn the first part of this work\, we focus on the evolution of the proton $0p_{1/2}$-$0p_{3/2}$ SO splitting in the O chain\, when the neutron $0d_{5/2}$ orbital is filled by 6 neutrons\, fro m $^{16}$O to $^{22}$O. The vast majority of studies performed so far in s table nuclei of the chart of nuclides shows that the amplitude of the SO s plitting scales with approximately A$^{2/3}$ [3]\, due to the surface-domi nant term of the spin-orbit force. The present study\, that goes well beyo nd stability\, should demonstrate if such a decrease of the SO splitting b etween $^{16}$O and $^{22}$O is found and if it is larger than expected. I ndeed\, the action of tensor forces should lead to a further decrease of t he SO splitting\, added to the role of SO force.\n\nThe $^{22}$O($p\,2p$) QFS knockout reaction provide information on the tensor force contribution to the $0p_{1/2}$-$0p_{3/2}$ SO splitting in the O isotope chain\, from N =8 to N=14 shell closure\, when the neutron $0d_{5/2}$ orbital is filled. The SO orbit splitting amplitude is planned to be obtained from the energi es and spectroscopic factors of the $1/2^-$ and $3/2^-$ states in $^{21}$N . In addition\, the $^{22}$O($p\,pn$) reaction has also been studied in or der to determine if 6 neutrons are indeed added in the $0d_{5/2}$ orbital from $^{16}$O to $^{22}$O\, or if a fraction of them are occupying the nea rby $1s_{1/2}$ orbital.\n\n\n\nIn the second part of this analysis\, we us e the $^{14}$B($p\,pn$) and $^{15}$B($p\,pn$) QFS knockout reactions to pr obe the neutron’s orbitals occupancies when moving from the magic\, N=8\ , $^{13}$B nucleus [4] to the neutron drip line in the B chain. A dominant $s$-wave contribution for the neutrons added to the $^{13}$B magic nucleu s [4] would indicate the halo nature of $^{14}$B (Sn$\n\nhttps://indico.if ic.uv.es/event/7332/contributions/23105/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23105/ END:VEVENT BEGIN:VEVENT SUMMARY:The NUMEN project: nuclear response to weak interaction investigat ed by nuclear reactions DTSTART;VALUE=DATE-TIME:20240528T100000Z DTEND;VALUE=DATE-TIME:20240528T103000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23774@indico.ific.uv.es DESCRIPTION:Speakers: Diana Carbone (INFN – Laboratori Nazionali del Sud \, Catania\, Italy)\nThe physics of neutrinoless double beta (0νββ) dec ay has important implications on particle physics\, cosmology and fundamen tal physics. It is the most promising process to access the effective neut rino mass. To determine quantitative information from the possible measure ment of the 0νββ decay half-lives\, the knowledge of the Nuclear Matrix Elements (NME) involved in the transition is mandatory. The possibility o f using heavy-ion induced double charge exchange (DCE) reactions as tools toward the determination of the NME is at the basis of the NUMEN project [ 1]. The basic points are that the initial and final state wave functions i n the two processes are the same and the transition operators are similar\ , including in both cases a superposition of Fermi\, Gamow-Teller and rank -two tensor components. Full understanding of the DCE reaction mechanism i s fundamental to disentangle the reaction part from the nuclear structure aspects relevant for the 0νββ decay NMEs. One of the most debated aspec t in the DCE and SCE nuclear reactions is the competition between the dire ct process\, proceeding via the meson-exchange paths\, and the sequential ones proceeding through the transfer of several nucleons.\n\nThe availabil ity of the MAGNEX large acceptance magnetic spectrometer [2] for high reso lution measurements of the DCE reactions is essential to obtain high resol ution energy spectra and accurate cross sections at very forward angles\, including zero degree\, and allows the concurrent measurement of the other relevant reaction channels (elastic and inelastic scattering\, one- and t wo-nucleon transfer and single charge exchange reactions). The strategy ap plied to study such a full net of reactions is to measure the experimental data in the same experimental conditions and analyze them using state-of- the-art nuclear structure and reaction theories in a unique comprehensive and coherent theoretical framework. This multichannel approach has been re cently applied to analyze some nets of nuclear reactions\, for example inv olving the $^{18}$O + $^{40}$Ca system. Moreover\, the absolute cross sect ions of some DCE reactions populating nuclei of interest for the 0νββ d ecay have been measured for the first time. These results will be presente d and discussed at the Conference.\n\n[1] F.Cappuzzello et al.\, Eur. Phys . J. A 54 (2018) 72.\n\n[2] F.Cappuzzello et al.\, Eur. Phys. J. A 52 (201 6) 167.\n\nhttps://indico.ific.uv.es/event/7332/contributions/23774/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23774/ END:VEVENT BEGIN:VEVENT SUMMARY:Microscopic description of induced fission dynamics DTSTART;VALUE=DATE-TIME:20240528T093000Z DTEND;VALUE=DATE-TIME:20240528T100000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23761@indico.ific.uv.es DESCRIPTION:Speakers: Dario Vretenar (Dario Vretenar Physics Department\, University of Zagreb\, Croatia)\nThe dynamics of induced fission is descri bed using a consistent microscopic framework that combines the time-depend ent generator coordinate method (TDGCM) and time-dependent nuclear density functional theory (TDDFT). While the former presents a fully quantum mech anical approach that describes the entire fission process as an adiabatic evolution of collective degrees of freedom\, the latter models the dissipa tive dynamics of the final stage of fission by propagating nucleons indepe ndently toward scission and beyond. The two methods\, based on the same nu clear energy density functional and pairing interaction\, are integrated a nd employed in a study of the charge distribution of yields and total kine tic energy for induced fission. The saddle-to-scission dynamics\, the time scale for the formation of a neck between the nascent fragments\, and the subsequent mechanism of scission into two or more independent fragments ar e explored. \n\n[1] Z. X. Ren\, D. Vretenar\, T. Nikšić\, P. W. Zhao\, J. Zhao\, and J. Meng\, Phys. Rev. Lett. 128\, 172501 (2022).\n[2] B. Li\, D. Vretenar\, Z. X. Ren\, T. Nikšić\, J. Zhao\, P. W. Zhao\, and J. Men g\, Phys. Rev. C 107\, 014303 (2023).\n[3] B. Li\, D. Vretenar\, T. Nikši ć\, P. W. Zhao\, and J. Meng\, Phys. Rev. C 108\, 014321 (2023).\n[4] B. Li\, D. Vretenar\, T. Nikšić\, J. Zhao\, P. W. Zhao\, and J. Meng\, Fron t. Phys. 19\, 44201 (2024).\n\nhttps://indico.ific.uv.es/event/7332/contri butions/23761/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23761/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent data on fusion far below the barrier for 12C + 28Si DTSTART;VALUE=DATE-TIME:20240528T084000Z DTEND;VALUE=DATE-TIME:20240528T090000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23078@indico.ific.uv.es DESCRIPTION:Speakers: Giovanna Montagnoli (Dip. di Fisica e Astronomia\, U niv. di Padova\, and INFN-PD)\nHeavy-ion fusion reactions are essential to investigate the fundamental problem of quantum tunnelling of many-body sy stems in the presence of intrinsic degrees of freedom. Studying the fusion of light systems with Q > 0\, and the identification of hindrance [a] req uires challenging measurements. The investigation of slightly heavier case s allows a reliable extrapolation towards the lighter astrophysical system s.\nWe measured the fusion excitation function of $^{12}$C + $^{28}$Si dow n to hundreds of nanobarn\, using $^{28}$Si beams from the XTU Tandem acce lerator of LNL. The combined setup of the γ-spectrometer AGATA [b] and tw o DSSD [c] around the target\, was used. The fusion-evaporation charged p articles were detected by the DSSD. The prompt γ-rays emitted by the evap oration residues (ER) were detected by AGATA. The fusion cross-sections ar e obtained from the coincident events between γ-rays and charged particle s.\nThe light-charged particles have been identified through pulse shape d iscrimination\, using their energy E$_{part}$ vs the rise time of the sign al $psd$ (left figure). The matrix on the right combines the coincidence e vents between the energies of γ-rays and charged particles\, detected by one ring of the forward DSSD\, at E$_{lab}$=50 MeV. The main transitions f rom the ER are identified. Neutron evaporation could not be observed\, but it is calculated to be not more than a few per cent for this system in th e measured energy range.\nPreliminary analyses provide very promising resu lts in the study of fusion cross sections for $^{12}$C + $^{28}$Si and oth er light systems at deep sub-barrier energies. The final results of this e xperiment will be shown.\n\n[Figure][1]\n[a] C.L. Jiang et al.\, Phys. Rev . Lett. 89\, 052701 (2002)\n[b] J.J. Valiente-Dobon et al.\, Nucl. Inst. M eth. Phys. Res. A 1049\, 168040 (2023)\n[c] http://www.micronsemiconducto r.co.uk\n\n\n [1]: https://drive.google.com/file/d/1PTjdz_HcLoQ8Pm0EMyxMU QC6SGneYhpD/view?usp=sharing\n\nhttps://indico.ific.uv.es/event/7332/contr ibutions/23078/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23078/ END:VEVENT BEGIN:VEVENT SUMMARY:The influence of dissipation on the quasielastic barrier distribut ions of the 20Ne+92\,94\,95Mo systems DTSTART;VALUE=DATE-TIME:20240528T082000Z DTEND;VALUE=DATE-TIME:20240528T084000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23129@indico.ific.uv.es DESCRIPTION:Speakers: Ernest Piasecki (Heavy Ion Laboratory\, University o f Warsaw\, Warsaw\, Poland)\, Giulia Colucci (Heavy Ion Laboratory\, Unive rsity of Warsaw\, Warsaw\, Poland)\, Agnieszka Trzcińska (Heavy Ion Labor atory\, University of Warsaw\, Warsaw\, Poland)\nThe Coupled Channels (CC) model successfully explained the strong enhancement of sub-barrier fusion cross sections as well as the observed structures in the barrier distribu tions for many systems. However\, there are several mechanisms whose influ ence on the fusion is still not clear\, as the role of weak (non-collectiv e excitations) reaction channels. The experimental barrier distributions o f some systems turned out to be without any structure\, in contradiction t o theoretical predictions [1\,2\,3]. Such an effect is caused by a dissipa tive mechanism\, where part of the kinetic energy is dissipated into the e xcitation of a multitude of internal non-collective levels of the system. This experimental evidence led to the development of a new model able to i nclude the non-collective excitations in the fusion reactions by extending the CC method using the random matrix theory (RMT) [4\,5].\nVery recently at the Heavy Ion Laboratory (HIL) of the University of Warsaw\, a compara tive study of the quasielastic barrier distributions of the $^{20}$Ne + $^ {92\,94\,95}$Mo systems was performed\, aiming to study the influence of d issipation due to single-particle excitations on the barrier distribution structure. The theoretical calculations performed within the CC+RMT model are in good agreement with the experimental data\, supporting the hypothes is that non-collective excitations can alter the structure of the barrier distributions. However\, the $^{94}$Mo shows a smoother and wider structur e in comparison to the $^{95}$Mo\, despite the higher level density of the latter. This difference might be due to another mechanism of dissipation\ , being the projectile-target transfers of light particles. In this perspe ctive\, the transfer cross sections for different transfer channels will b e measured in a separate experiment at HIL. The measurement would clarify the role of transfer couplings on the shape of barrier distribution and th e dynamic of the reactions of the three systems. Details on the recent res ults and plans for fusion and transfer cross-section measurements at HIL w ill be discussed in this contribution.\n\n[1] E. Piasecki et al.\, Phys. R ev. C 85 (2012)\, 054608\n[2] A. Trzcinska et al.\, Phys. Rev. C 93 (2016) \n[3] A. Trzcinska et al.\, Phys. Rev. C 102 (2020) 034617\n[4] S. Yusa et al.\, Phys. Rev. C 82 (2010) 024606\n[5] E. Piasecki et al.\, Phys. Rev. C 100 (2019) 014616\n\nhttps://indico.ific.uv.es/event/7332/contributions/ 23129/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23129/ END:VEVENT BEGIN:VEVENT SUMMARY:Multinucleon Transfer Reactions for fission study DTSTART;VALUE=DATE-TIME:20240528T073000Z DTEND;VALUE=DATE-TIME:20240528T080000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23760@indico.ific.uv.es DESCRIPTION:Speakers: Katsuhisa Nishio (Japan Atomic Energy Agency)\nThe M NT reaction allows us to produce many fissioning nuclei\, including neutro n-rich nuclei\, which cannot be populated by other reactions. Also\, excit ation energy of compound nucleus distributes widely. These properties are used to obtain fission-fragment mass distribution (FFMDs) for many nuclide s as well as their excitation-energy dependence [1\,2\,3]. The experiments were carried out at the JAEA tandem facility using $^{18}$O beam and vari ous radioactive target nuclei. From the data\, the probability of each mul ti-chance fission (fission after neutron emission) was quantified for the first time [4\,5]. From the threshold of the excitation function of fissio n probably\, fission barrier height was derived [6]\, one of the key obser vables to verify fission models.\n\nOur setup for MNT-induced fission allo ws us to obtain data for MNT mechanism itself. From the fission-fragment a ngular distribution relative to the rotational axis\, we have determined t he average angular momentum for each MNT channel [7]. The value is useful to determine the survival probability of compound nucleus to derive the cr oss sections of neutron-rich evaporation residues generated in MNT reactio ns.\n\nReference\n\n[1] R. Leguillon et al.\, Phys. Lett. B 761\, 125 (201 6).\n\n[2] M.J. Vermeulen et al.\, Phys. Rev. C 102\, 054610 (2020).\n\n[3 ] A.N. Andreyev\, K. Nishio\, K.-H. Schmidt\, Rep. Prog. Phys. 81\, 016301 (2018).\n\n[4] K. Hirose et al.\, Phys. Rev. Lett. 119\, 222501 (2017).\n \n[5] S. Tanaka et al.\, Phys. Rev. C 100\, 064605 (2019).\n\n[6] K.R. Kea n et al.\, 100\, 014611 (2019).\n\n[7] S. Tanaka et al.\, Phys. Rev. C 105 \, L021602 (2022).\n\nhttps://indico.ific.uv.es/event/7332/contributions/2 3760/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23760/ END:VEVENT BEGIN:VEVENT SUMMARY:Probing the fission-landscape and the structure of superheavy nucl ei DTSTART;VALUE=DATE-TIME:20240528T070000Z DTEND;VALUE=DATE-TIME:20240528T073000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23770@indico.ific.uv.es DESCRIPTION:Speakers: Khuyagbaatar Jadambaa (GSI Darmstadt\, Germany)\nSup erheavy nuclei (SHN) with an extremely large number of protons (e.g.\, up to Z = 126) remain to be one of the main topics in nuclear physics [1]. On e of the ultimate goals of this research is to explore the fission-stabili ty of SHN at around Z = 114 − 126 and N = 184\, where the next shell clo sures are predicted to occur [1]. The fission half-lives of those SHN were predicted to be much longer than the half-lives of neighboring ones. Acco rdingly\, the fission-landscape of SHN regarding the half-lives should for m an island in a sea of instability.\n\nTo date\, SHN with Z up to 118 and neutron numbers up to N = 177 are known [2\,3]. They were synthesized mos tly in heavy-ion induced reactions with atom-at-a-time rates and were iden tified predominantly by their $\\alpha$-particle emission and rarely by fi ssion. Corresponding experimental data\, e.g.\, partial half-lives of thes e radioactive decays\, confirm the concept of the island of stability.\n\n However\, still many properties of the SHN\, such as their shell structure and its impact on their radioactive decay modes\, which are necessary for building a more complete picture of the nuclear stability-landscape are p oorly known [4-7]. This circumstance has a primary reason\, which is the l ack of comprehensive experimental spectroscopy data on their nuclear decay s\, such as the $\\beta$-decay\, $\\alpha$-decay fine structure and fissio n.\n\nIntensive programs aimed at exploring the fission-landscape and the shell structure of SHN are ongoing worldwide\, including the SHE-Chemistry department at GSI\, Germany [8].\n\nI will present the status and recent results of exploring the fission-landscape of SHN.\n\n[1] Yu.Ts. Oganessia n\, A. Sobiczewski\, G.M. Ter-Akopian\, Phys. Scr. 92(2)\, 023003 (2017).\ n\n[2] F.G. Kondev et al.\, 2021 Chinese Phys. C 45 030001 (2021).\n\n[3] Yu.Ts. Oganessian et al.\, Phys. Rev. C 106\, 064306 (2022).\n\n[4] F.P. H esberger\, Eur. Phys. J. A 53\, 75 (2017).\n\n[5] S. Hofmann et al.\, Pure Appl. Chem. 90\, 1773 (2018).\n\n[6] J. Khuyagbaatar\, Eur. Phys. J. A 55 \, 134 (2019)\, Nucl. Phys. A 1002\, 121958 (2020)\, Eur. Phys. J. A 58\, 243 (2022).\n\n[7] M. Bender et al.\, J. Phys. G: Nucl. Part. Phys. 47\, 1 13002 (2020).\n\n[8] J. Khuyagbaatar\, et al.\, Eur. Phys. J. WOC\, 131\, 03003 (2016)\, Phys. Rev. Lett. 125\, 142504 (2020)\, Phys. Rev. C 104\, L 031303 (2021)\, Phys. Rev. C 106\, 024309 (2022).\n\nhttps://indico.ific.u v.es/event/7332/contributions/23770/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23770/ END:VEVENT BEGIN:VEVENT SUMMARY:Various facets of shape coexistence in neutron-rich nuclei within a beyond-mean-field approach DTSTART;VALUE=DATE-TIME:20240527T144000Z DTEND;VALUE=DATE-TIME:20240527T150000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23068@indico.ific.uv.es DESCRIPTION:Speakers: Alexandrina Petrovici (National Institute for Physic s and Nuclear Engineering IFIN-HH)\nNeutron-rich nuclei in the A=100 mass region display a large variety of shape coexistence phenomena dominating t heir structure and dynamics. Multifaceted impact of shape coexistence is r evealed in the structural evolution with spin\, excitation energy\, and ne utron number\, the appearance of the isomeric states\, their exotic decay including allowed and first-forbidden β decay. We studied the effects of shape coexistence in 96Y and 96Zr on the allowed and first-forbidden β de cay of low- and intermediate-spin isomers and exotic features of the popul ated states as well as on the first-forbidden β decay of the 0− ground state of 92Rb to 0+ ground state and 2+ states in 92Sr and the properties of the involved states.\nAiming to a simultaneous description of the impac t of shape coexistence and mixing on different exotic phenomena we investi gated the structure and dynamics of the involved neutron-rich nuclei in th e frame of the beyond-mean-field complex Excited Vampir variational model using the effective interaction derived from a nuclear matter G matrix bas ed on the charge-dependent Bonn CD potential in a large model space. Recen t results on the comprehensive treatment of different identified character istics concerning the structure and dynamics of these nuclei manifesting m ultiple shape coexistence will be presented and compared to available expe rimental data.\n1. A. Petrovici and A. S. Mare\, Phys. Rev. C 101\, 024307 (2020). \n2. A. Petrovici\, Phys. Rev. C 109\, 024303 (2024).\n\nhttps:// indico.ific.uv.es/event/7332/contributions/23068/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23068/ END:VEVENT BEGIN:VEVENT SUMMARY:Shell-model study of 28Si: shape coexistence and superdeformation DTSTART;VALUE=DATE-TIME:20240527T142000Z DTEND;VALUE=DATE-TIME:20240527T144000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23132@indico.ific.uv.es DESCRIPTION:Speakers: Dorian Frycz (University of Barcelona)\nWe study the shape coexistence in the nucleus $^{28}$Si with the nuclear shell model u sing numerical diagonalizations complemented with variational calculations based on the projected generator-coordinate method. Although the ground-s tate oblate rotational band is well described in the $sd$ shell by the USD B interaction\, the second excited $0^+_3$ state and higher-energy levels lack the features of a prolate rotational band\, in contrast to experiment . Thus\, guided by the quasi-SU(3) model\, we slightly lower the energy of the $d_{3/2}$ orbital\, which leads to a good description of the prolate band. Alternatively\, we extend the configuration space to also include th e $pf$ shell\, finding that the prolate band appears naturally using the S DPF-NR interaction. Finally\, we address the possibility of superdeformati on in $^{28}$Si within the $sdpf$ space. Our results disfavour the appeara nce of superdeformed states with excitation energy below 20 MeV.\n\nhttps: //indico.ific.uv.es/event/7332/contributions/23132/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23132/ END:VEVENT BEGIN:VEVENT SUMMARY:β-decay study of 76\,77Cu DTSTART;VALUE=DATE-TIME:20240527T140000Z DTEND;VALUE=DATE-TIME:20240527T142000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23100@indico.ific.uv.es DESCRIPTION:Speakers: David Palacios Suárez-Bustamante (IGFAE )\nNuclei i n the vicinity of doubly-magic nuclei\, such as $^{78}$Ni\, are of conside rable interest for studying the evolution of shell structure within the nu clear shell model. Understanding this evolution is essential for accuratel y describing exotic nuclear phenomena. In particular\, the shape coexisten ce in $^{79}$Zn makes this region especially intriguing\, given that such a phenomenon is uncommon in the vicinity of doubly-magic nuclei. Additiona lly\, $^{78}$Ni and its neighboring nuclei exhibit high neutron-to-proton ratios\, making them particularly significant in the field of astrophysics due to their role in the rapid neutron-capture process (r-process). Explo ring these neutron-rich nuclei provides crucial insights into the mechanis m underlying the r-process.\n\nThe nuclear structure of $^{77}$Zn has been studied through the $\\beta$ decay of $^{77}$Cu at ISOLDE. Copper isotope s were produced via neutron-induced fission on a UC$_x$ target. $^{77}$Cu ions were laser ionized\, accelerated\, mass-separated and implanted into an aluminized mylar tape on the ISOLDE Decay Station (IDS)\, where the exp erimental setup was installed. We report on the decay scheme with newly di scovered transitions and levels\, the branching ratio of the $\\beta$n pro cess and\, for the first time\, the half-lives of two excited states in $^ {77}$Zn.\n\n\nWe also investigated the controversial existence of the $^{7 6}$Cu isomeric state. According to our data\, the scenario remains unclear .\n\nhttps://indico.ific.uv.es/event/7332/contributions/23100/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23100/ END:VEVENT BEGIN:VEVENT SUMMARY:Multinucleon Transfer Reactions: Recent Insights from Experiments at LNL-INFN DTSTART;VALUE=DATE-TIME:20240527T130000Z DTEND;VALUE=DATE-TIME:20240527T133000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23773@indico.ific.uv.es DESCRIPTION:Speakers: Tea Mijatović (Institut Ruđer Bošković (IBR)\, C roatia)\nTransfer reactions are pivotal in nuclear structure and reaction studies. In heavy-ion transfer reactions\, multiple nucleons can be transf erred in a single collision along with significant energy and angular mome nta from the relative motion to the intrinsic degrees of freedom [1\,2]. T his establishes multinucleon transfer reactions as an essential tool for p robing a wide array of topics\, from nucleon-nucleon correlations to react ion dynamics [3].\n\nRecent experiments performed at the Legnaro National Laboratories (LNL\, INFN) with the large solid angle magnetic spectrometer PRISMA have focused on studying nucleon-nucleon correlations with heavy-i on beams on medium-mass targets [4\,5]. Transfer cross sections were measu red across various range of energies in inverse kinematics\, from near to far below the Coulomb barrier. Interpretations were derived from excitatio n functions\, extending to large distances of closest approach\, where nuc lear absorption is minimal. Further studies targeted the production mechan ism of neutron-rich nuclei [6-8]\, highlighting transfer processes as a co mpetitive method for producing exotic species\, especially heavy neutron-r ich nuclei.\n\nThis presentation offers an overview of these experiments\, focusing on key results\, challenges\, and recent advancements\, especial ly in connection with the AGATA array currently coupled to PRISMA.\n\n[1] L. Corradi\, G. Pollarolo\, and S. Szilner\, J. Phys. G: Nucl. Part. Phys. 36\, 113101 (2009).\n\n[2] L. Corradi et al.\, Nucl. Instr. and Meth. B31 7\, 743 (2013).\n\n[3] T. Mijatović\, Front. Phys. 10:965198 (2022).\n\n[ 4] D. Montanari et al.\, Phys. Rev. Lett. 113\, 052601 (2014)\, Phys. Rev. C 93\, 054623 (2016).\n\n[5] L. Corradi et al.\, Phys. Lett. B 834 (2022) 137477.\n\n[6] T. Mijatović et al.\, Phys. Rev. C 94\, 064616 (2016).\n\ n[7] P. Čolović et. al.\, Phys. Rev. C 102\, 054609 (2020).\n\n[8] J. Di klić et. al.\, Phys. Rev. C 107\, 014619 (2023).\n\nhttps://indico.ific.u v.es/event/7332/contributions/23773/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23773/ END:VEVENT BEGIN:VEVENT SUMMARY:Probing the rapid onset of deformation below 68Ni through the beta decay of 67Mn DTSTART;VALUE=DATE-TIME:20240527T162000Z DTEND;VALUE=DATE-TIME:20240527T164000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23113@indico.ific.uv.es DESCRIPTION:Speakers: Victoria Vedia (TRIUMF)\nOne of the best-known diver gences from the independent-particle shell model description is the existe nce of islands of inversion [1]. The IoI of the region N=40 draws particul ar attention since the neutron number 40 was postulated as a non-tradition al “magic” number and N = 40 represents the boundary between the negat ive-parity pf shell and the positive-parity g shell. In stable nuclei\, th e\nneutron g$_{9/2}$ orbital is close enough to the pf shell to reduce thi s shell gap resulting in a more stable subshell closure at N = 50. Measure ments of B(E2) values and E(2$^{+}$) in the neutron-rich region show incre ased collectivity through the N = 40 shell gap\, with the clear exception of $^{68}$Ni [2\,3].\nDeformation and shape coexistence have been identifi ed in the area\, LNPS calculations predict triple shape coexistence for $^ {67}$Co (N=40)\, with three rotational bands [4]. And\, recent experiments on $^{67}$Fe (N=41) propose a spin-parity of 5/2$^{+}$ or 1/2$^{−}$ for its ground state [5] which indicates a significant deformation. In additi on\, shape coexistence is also expected for $^{67}$Fe. Despite the high in terest in the region\, very limited information is available\, to this end \, an experiment was performed at the TRIUMF-ISAC facility utilizing the G RIFFIN spectrometer [6]\, where the β and βn decay of $^{67}$Mn populate d the $^{67\,66}$Fe\, $^{67\,66}$Co and $^{67\,66}$Ni isotopes.\nThis data set contains orders of magnitude more statistics than previous studies al lowing us to build for the first time a complete level scheme of $^{67}$Fe and $^{67}$Ni\, and to improve upon the known β- decay level schemes of $^{67}$Co\, by expanding the number of transitions and levels\, as well as by improving the precision of branching ratios and ground-state half-life measurement. In addition\, measurements of level lifetimes down to the pi cosecond range will allow us to investigate the band structure in these nu clei. For the 67Fe isotope\, a good level of statistics will make it possi ble to measure the energy of the identified isomeric state and improve the lifetime measurement.\nThese results can provide further insight into the structure of the states by comparison to simple models and large-scale sh ell model calculations to confirm or refute the shape coexistence picture predicted by LNPS calculations and the shrinking of the N=40 gap just one proton below $^{68}$Ni.\nPreliminary results from the analysis will be pre sented and discussed.\nReferences\n[1] B. A. Brown. Physics\, 3:104 (2010) .\n[2] S. Naimi et al.\,Phys. Rev. C 86 (2012)\, p. 014325\n[3] M. Hannawa ld et al.\, Phys. Rev. Lett. 82 (1999)\, pp. 1391–1394.\n[4] F. Recchia et al.\,Phys. Rev. C\, 85:064305 (2012)\n[5] M. Sawicka et al.\, The Europ ean Physical Journal A - Hadrons and Nuclei\, 16(1):51–54\, 2003\n[6] Ga rnsworthy et al.\, Nucl. Inst. Meths. A 918\, 9 (2019)\n\nhttps://indico.i fic.uv.es/event/7332/contributions/23113/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23113/ END:VEVENT BEGIN:VEVENT SUMMARY:Anomalous B4/2 ratio in the yrast band of 167Os DTSTART;VALUE=DATE-TIME:20240527T160000Z DTEND;VALUE=DATE-TIME:20240527T162000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23104@indico.ific.uv.es DESCRIPTION:Speakers: Irene Zanon (Stockholm University)\nSpectroscopic pr operties of exotic nuclei are powerful tools to obtain a better insight on the evolution of nuclear structure far from the stability. Mid-shell nucl ei are expected to exhibit collective behaviour which is typically reflect ed in the observation of low excitation energies of the first excited stat es and high transition probabilities. Moreover\, the collectivity is expec ted to increase with the spin\, causing both the $R_{4/2}=E_X(4^+)/E_X(2^+ )$ to be higher than 2 and the $B_{4/2} = B(E2\;4^+\\to 2^+)/B(E2\;2^+\\to 0^+)$ to be higher than the unit.\nHowever\, an increasing number of mid- shell nuclei had been found to present a $B_{4/2}\n\nhttps://indico.ific.u v.es/event/7332/contributions/23104/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23104/ END:VEVENT BEGIN:VEVENT SUMMARY:Parity-violating asymmetry and dipole polarizabilities in atomic n uclei: how do they reconcile with each other? DTSTART;VALUE=DATE-TIME:20240527T080500Z DTEND;VALUE=DATE-TIME:20240527T083500Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23764@indico.ific.uv.es DESCRIPTION:Speakers: Xavier Roca Maza (University of Barcelona\, Spain)\n In the recent years\, attention has been paid to a careful measurement of the dipole polarizability and parity violating asymmetry in medium and hea vy mass nuclei such as $^{48}$Ca and $^{208}$Pb [1-4]. These two observabl es\, as it already happened for the neutron skin thickness\, are thought t o be particularly sensitive to the properties of the nuclear equation of s tate at densities around nuclear saturation [5]. Hence\, the interest in t he low energy nuclear physics community to foster the needed experimental and theoretical developments to accurately study these two observables.\n\ nIn this contribution I will briefly overview our past and recent theoreti cal analysis of the parity violating asymmetry and electric dipole polariz ability [6-10].\n\n[1] D. Adhikari et al.\, Phys. Rev. Lett. 126\, 172502 (2021)\n\n[2] D. Adhikari et al.\, Phys. Rev. Lett. 129\, 042501 (2022)\n\ n[3] A. Tamii et al.\, Phys. Rev. Lett. 107\, 062502 (2011)\n\n[4] J. Birk han et al.\, Phys. Rev. Lett. 118\, 252501 (2017)\n\n[5] X. Roca-Maza\, N. Paar\, Prog. Part. and Nucl. Phys. 101\, 96-176 (2018).\n\n[6] X. Roca-Ma za\, M. Centelles\, X. Viñas\, M. Warda\, Phys. Rev. Lett. 106\, 252501 ( 2011).\n\n[7] P.-G.Reinhard\, X. Roca-Maza\, W. Nazarewicz\, Phys. Rev. Le tt. 127\, 232501 (2021).\n\n[8] P.-G.Reinhard\, X. Roca-Maza\, W. Nazarewi cz\, Phys. Rev. Lett. 129\, 232501 (2022).\n\n[9] X. Roca-Maza\, et al. Ph ys. Rev. C 88\, 024316 (2013).\n\n[10] X. Roca-Maza\, et al. Phys. Rev. C 92\, 064304 (2015).\n\nhttps://indico.ific.uv.es/event/7332/contributions/ 23764/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23764/ END:VEVENT BEGIN:VEVENT SUMMARY:Multifaceted character of shape coexistence phenomena in atomic nu clei DTSTART;VALUE=DATE-TIME:20240527T073500Z DTEND;VALUE=DATE-TIME:20240527T080500Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23776@indico.ific.uv.es DESCRIPTION:Speakers: Silvia Leoni (University of Milano and INFN sez.-Mil ano\, Italy)\nFor the collaboration:\nS. Leoni et al.\, *University of Mil ano and INFN sez.-Milano\, Italy*\nB. Fornal et al.\, *Institute of Nuclea r Physics PAN\, Krakow\, Poland*\nN. Marginean et al.\, *IFIN HH\, Buchare st\, Romania*\nC. Michelagnoli et al.\, *ILL\, Grenoble\, France*\nR. V. F . Janssens et al.\, *University of North Carolina at Chapel Hill\, North C arolina\, USA*\nM. Sferrazza\, *Universitè libre de Bruxelles\, Bruxelles \, Belgium*\nJ. Wilson et al. \, *IPN-Orsay\, France*\nT. Otsuka and Y. Ts unoda\, *University of Tokyo\, Tokyo\, Japan*\n\nWe present a recent surve y of decay properties of excited 0$^+$ states in regions of the nuclear ch art well known for shape coexistence phenomena\, focusing\, in particular\ , on even-even nuclei around the Z=20 (Ca)\, 28 (Ni)\, 50 (Sn)\, 82 (Pb) p roton shell closures and along the Z=36 (Kr)\, Z=38 (Sr) and Z=40 (Zr) iso topic chains [1]. The aim is to identify examples of *extreme shape coexis tence*\, namely\, coexisting deformed and spherical (or close-to-spherical ) nuclear states\, with wave functions well separated in the Potential Ene rgy Surface (PES) with coordinates in the deformation space. Such a wave f unction separation may result in a substantially hindered transition betwe en the corresponding structures. This is in analogy to the 0$^+$ fission s hape isomers in the actinides region and to the superdeformed (SD) states at the decay-out spin in medium/heavy mass systems. In the survey\, the Hi ndrance Factor (HF) of the E2 transitions de-exciting 0$^+$ states or SD d ecay-out states is a primary quantity which is used to differentiate betwe en types of shape coexistence.\nIt is found that a limited number of 0$^+$ excitations (in the Ni\, Sr\, Zr and Cd regions) exhibit large HF values (>10)\, few of them being associated with a clear separation of coexisting wave functions\, while in most cases the decay is not hindered\, due to t he mixing between different configurations. A brief discussion will be dev oted to the case of the relatively light $^{64\,66}$Ni nuclei\, where shap e-isomer-like structures\, of prolate deformed nature\, have been observed at spin zero by performing gamma-spectroscopy investigation with differen t types of reaction mechanisms (i.e.\, proton and neutron transfer\, neutr on capture and Coulomb excitation) [2\,3]. An analogous situation is expec ted to occur in $^{112-116}$Sn isotopes\, for which preliminary results wi ll be presented from experiments performed at IFIN-HH (Magurele\, Romania) with ROSPHERE\, and at Legnaro National Laboratory (Padua\, Italy) with t he AGATA tracking array. The experimental data will be interpreted in the light of state-of-the-art Monte Carlo Shell Model (MCSM) calculations [4]\ , according to which the action of the monopole tensor force plays a relev ant role in stabilizing and deepening isolated\, deformed local minima in the PES\, thus leading to a significant separation of the wave functions o f states residing in these minima and\, eventually\, to shape isomerism.\n \nReferences\n[1] S. Leoni\, B. Fornal\, A. Bracco\, Y. Tsunoda\, and T. O tsuka\, to be published in Prog. Part. Nuc. Phys.\n[2] S. Leoni\, B. Forna l\, N. Marginean et al.\, Phys. Rev. Lett. 118\, 162502 (2017)\n[3] N. Mar ginean\, et al.\, Phys. Rev. Lett. 125\, 102502 (2020)\n[4] Y. Tsunoda et al.\, Phys. Rev. C 89\, 031301 (2014)\n\nhttps://indico.ific.uv.es/event/7 332/contributions/23776/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23776/ END:VEVENT BEGIN:VEVENT SUMMARY:High Multipolarity Tetrahedral Symmetry Shapes Predicted in Nuclei with Nucleon Numbers around Z=N=40 DTSTART;VALUE=DATE-TIME:20240527T111000Z DTEND;VALUE=DATE-TIME:20240527T113000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23083@indico.ific.uv.es DESCRIPTION:Speakers: Irene Dedes (IFJ PAN)\nThere is an increasing intere st in exotic symmetries predicted to occur in atomic nuclei\, yet in the p ast traditionally associated with molecular structures. This tendency is w itnessed by growing number of publications in this domain. Tetrahedral and octahedral symmetries can be considered among the most exotic since they are predicted to produce 4-fold degeneracies of the nucleonic levels in co ntrast to the standard 2-fold (Kramers) degeneracies. \nFollowing Ref. [1 ]\, the presence of tetrahedral symmetry is expected to occur in groups of nuclei throughout the nuclear chart. In this project we examine systemati cally the exotic symmetry properties of Zirconium nuclei\, since $Z=N=40$ are predicted to be among the leading tetrahedral magic numbers. Our inter est was strengthened by the experimental identification of the tetrahedral and octahedral symmetries published in Ref. [2]. \n\nIt is well known tha t the molecular symmetry nuclear surfaces can be parametrised with the hel p of the standard spherical harmonics\, $\\{Y_{\\lambda\,\\mu}\\}$ with on ly a small sub-families of them contributing. In particular it can be show n\, cf. e.g. Ref.[3]\, that tetrahedral symmetry shapes can be generated\, up to two lowest orders by spherical harmonics with multipolarities $\\la mbda=3$ and 7. We have systematically examined the tetrahedral symmetry sh ell effects around $Z=N=40$ magic gaps discovering that\, in contrast to t he usual expectations\, the strongest tetrahedral shell gaps are predicted as the effect of the 7$^{\\rm th}$ order multipolarity. We will present t he results performed using a realistic\, phenomenological mean-field appro ach with the new parametrisation of the Hamiltonian tested for the absence of parametric correlations and thus expected to be stable. \n\nTo our kno wledge\, these are the first theory predictions using realistic mean-field Hamiltonians suggesting very low lying potential energy minima of the 7$ ^{\\rm th}$ order multipolarity. We discuss in detail the experimental ver ification criteria.\n\nIn addition\, the new internet service MeanField4Ex p (https://meanfield4exp.ifj.edu.pl) allowing to confront the theoretical elementary structure properties of atomic nuclei with experiment and devel oped under the EURO-LABS Project\, will be presented.\n\n**References**\n\ n[1] J. Dudek\, A. Góźdź\, N. Schunck\, and M. Miśkiewicz\, Phys. Rev. Lett. **88**\, 2502502-1 (2002)\n \n[2] J. Dudek\, D. Curi en\, I. Dedes\, K. Mazurek\, S. Tagami\, Y. R. Shimizu\, and T. Bhattachar jee\, Phys. Rev. C **97**\, 021302(R) (2018).\n\n[3] J. Dudek\, I. Dedes\, A. Baran\, A. Gaamouci and D. Rouvel\, Eur. Phys. J. Spec. Top.\, https:/ /doi.org/10.1140/epjs/s11734-024-01093-7\n \n\n\n---------- \nIn collaboration with Jerzy DUDEK\, University of Strasbourg.\n\nhttps:/ /indico.ific.uv.es/event/7332/contributions/23083/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23083/ END:VEVENT BEGIN:VEVENT SUMMARY:Nuclear Shapes and their Coexistence at the Islands of Inversion DTSTART;VALUE=DATE-TIME:20240527T103000Z DTEND;VALUE=DATE-TIME:20240527T105000Z DTSTAMP;VALUE=DATE-TIME:20260306T112818Z UID:indico-contribution-7332-23077@indico.ific.uv.es DESCRIPTION:Speakers: Alfredo Poves (Departamento de Física Teórica and IFT\, UAM-CSIC )\nI shall discuss the meaning of the "nuclear shape" in t he laboratory frame proper to the Spherical Shell Model\, and the \nalgebr aic models that make its foundations.\nShape coexistence\, shape mixing an d shape entanglement will be illustrated with relevant physics cases\, In particular\nI shall show that shape coexistence acts as a portal to the Islands of Inversion at\nat N=20-28 and N=40-50 for very neutron rich nuc lei.\n\nhttps://indico.ific.uv.es/event/7332/contributions/23077/ LOCATION:ADEIT - Valencia URL:https://indico.ific.uv.es/event/7332/contributions/23077/ END:VEVENT END:VCALENDAR