BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN 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:20260315T180758Z UID:indico-contribution-4070-23142@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:20260315T180758Z UID:indico-contribution-4070-23101@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:20260315T180758Z UID:indico-contribution-4070-23102@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:20260315T180758Z UID:indico-contribution-4070-23780@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:20260315T180758Z UID:indico-contribution-4070-23779@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 END:VCALENDAR