Shell-model half-lives for r-process waiting point nuclei including first-forbidden contributions
Nuclear Theory
2013-01-23 v1
Abstract
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.
Cite
@article{arxiv.1301.5225,
title = {Shell-model half-lives for r-process waiting point nuclei including first-forbidden contributions},
author = {Q. Zhi and E. Caurier and J. J. Cuenca-García and K. Langanke and G. Martínez-Pinedo and K. Sieja},
journal= {arXiv preprint arXiv:1301.5225},
year = {2013}
}
Comments
14 pages, 17 figures, submitted to Phys. Rev. C