Shell - model half - lives for r - process N = 82 nuclei

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. PACS. 21.60.Cs Shell model – 27.60.+j 90 ≤ A ≤ 149 – 23.40.−s Beta decay; double beta decay; electron and muon capture