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HK: Fachverband Physik der Hadronen und Kerne
HK 30: Structure and Dynamics of Nuclei VII
HK 30.3: Talk
Tuesday, March 12, 2024, 18:15–18:30, HBR 19: C 5b
Shell-Model calculations for masses and β-decay half-lives near N=50 — •Zafar Iftikhar1,2,3, Gabriel Martínez-Pinedo1,2,4, Thomas Neff1, Riccardo Mancino2,1, and Frédéric Nowacki5 — 1GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany — 2Institut für Kernphysik (Theoriezentrum), Department of Physics, Technische Universität Darmstadt, D-64298 Darmstadt, Germany — 3FATA University, FR Kohat 26100, Khyber Pakhtunkhwa, Pakistan — 4Helmholtz Forschungsakademie Hessen für FAIR, GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany — 5Institut Pluridisciplinaire Hubert CURIEN (IPHC), Strasbourg 67200, France
The doubly magic 78Ni was recently investigated at RIBF, revealing competing spherical and deformed configurations. Due to limited experimental data in this neutron-rich region, one has to rely on theoretical calculations for masses and β-decay half-lives. We perform shell-model calculations for β-decay half-lives with pf−sdg model space for protons and neutrons (required by the unnatural parity states and Gamow-Teller transitions). We use an effective interaction adjusted to reproduce the experimental data around 78Ni and the measured half-lives. We also report the calculated S2n for the isotopic chains of Z=22−30 with N=40−52.
ZI is supported by FATA University, Pakistan. GMP is supported by Deutsche Forschungsgemeinschaft- Project-ID 279384907 SFB1245. RM is supported by SFB1245.
Keywords: Beta-decay half-lives; nuclear structure; PFSDG-U interaction; shell-model; neutron-rich nuclei