BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN 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:20260913T165142Z UID:indico-contribution-4076-23827@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: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:20260913T165142Z UID:indico-contribution-4076-23819@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:First Observation of New Isotopes at FRIB: What Comes Next? DTSTART;VALUE=DATE-TIME:20240531T111000Z DTEND;VALUE=DATE-TIME:20240531T113000Z DTSTAMP;VALUE=DATE-TIME:20260913T165142Z UID:indico-contribution-4076-23103@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:20260913T165142Z UID:indico-contribution-4076-23772@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:20260913T165142Z UID:indico-contribution-4076-23771@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 END:VCALENDAR