Regular Article - Theoretical Physics
Shell model half-lives for r-process N = 82 nuclei
J. J. Cuenca-Garcıa1, G. Martınez-Pinedo1 
, K. Langanke1, 2, F. Nowacki3 and I. N. Borzov1
| (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
U.-G. Meißner
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
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
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