β decay of the very neutron-deficient Ge60 and Ge62 nuclei

Le résumé fourni par la source

We report here the results of a study of the $\ensuremath{\beta}$ decay of the proton-rich Ge isotopes, $^{60}\mathrm{Ge}$ and $^{62}\mathrm{Ge}$, produced in an experiment at the RIKEN Nishina Center. We have improved our knowledge of the half-lives of $^{62}\mathrm{Ge}$ [73.5(1) ms] and $^{60}\mathrm{Ge}$ [25.0(3) ms] and its daughter nucleus, $^{60}\mathrm{Ga}$ [69.4(2) ms]. We measured individual $\ensuremath{\beta}$-delayed proton and $\ensuremath{\gamma}$ emissions and their related branching ratios. Decay schemes and absolute Fermi and Gamow-Teller transition strengths have been determined. The mass excesses of the nuclei under study have been deduced. A total $\ensuremath{\beta}$-delayed proton-emission branching ratio of 67(3)% has been obtained for $^{60}\mathrm{Ge}$. New information has been obtained on the energy levels populated in $^{60}\mathrm{Ga}$ and on the ${1/2}^{\ensuremath{-}}$ excited state in the $\ensuremath{\beta}p$ daughter $^{59}\mathrm{Zn}$. We extracted a ground state--to--ground state feeding of 85.3(3)% for the decay of $^{62}\mathrm{Ge}$. Eight new $\ensuremath{\gamma}$ lines have been added to the deexcitation of levels populated in the $^{62}\mathrm{Ga}$ daughter.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.