1.Gesellschaft für Schwerionenforschung Darmstadt,Darmstadt,Germany;2.Institut für Kernphysik,Technische Universit?t Darmstadt,Darmstadt,Germany;3.Institut de Recherches Subatomiques,IN2P3-CNRS/Université Louis Pasteur,Strasbourg,France
Abstract:
We have performed shell model calculations of the half-lives and neutron-branching probabilities of the r-process waiting-point
nuclei at the magic neutron number N = 82 . These new calculations use a larger model space than previous shell model studies and an improved residual interaction
which is adjusted to recent spectroscopic data around A = 130 . Our shell model results give a good account of all experimentally known half-lives and Qβ -values for the N = 82 r-process waiting-point nuclei. Our half-life predictions for the N = 82 nuclei with Z = 42-46 agree well with recent estimates based in the energy-density functional method.