https://doi.org/10.1140/epja/i2007-10477-3
Regular Article - Theoretical Physics
Shell model half-lives for r-process N = 82 nuclei
1
Gesellschaft für Schwerionenforschung Darmstadt, Planckstr. 1, D-64259, Darmstadt, Germany
2
Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstr. 9, D-64289, Darmstadt, Germany
3
Institut de Recherches Subatomiques, IN2P3-CNRS/Université Louis Pasteur, F-67037, Strasbourg, France
Received:
30
August
2007
Accepted:
4
September
2007
Published online:
11
October
2007
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 Q β -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 β decay; double β decay; electron and muon capture –
© Società Italiana di Fisica and Springer-Verlag, 2007
