%0 Journal Article
%T Shell-model half-lives for r-process waiting point nuclei including first-forbidden contributions
%A Q. Zhi
%A E. Caurier
%A J. J. Cuenca-Garc¨ªa
%A K. Langanke
%A G. Mart¨ªnez-Pinedo
%A K. Sieja
%J Physics
%D 2013
%I arXiv
%X We have performed large-scale shell-model calculations of the half-lives and neutron-branching probabilities of the r-process waiting point nuclei at the magic neutron numbers N=50, 82, and 126. The calculations include contributions from allowed Gamow-Teller and first-forbidden transitions. We find good agreement with the measured half-lives for the N=50 nuclei with charge numbers Z=28-32 and for the N=82 nuclei 129Ag and 130Cd. The contribution of forbidden transitions reduce the half-lives of the N=126 waiting point nuclei significantly, while they have only a small effect on the half-lives of the N=50 and 82 r-process nuclei.
%U http://arxiv.org/abs/1301.5225v1