Beta decay of the very neutron-deficient ${}^{60}$Ge and ${}^{62}$Ge nuclei

Abstract

We report here the results of a study of the $\beta$ decay of the proton-rich Ge isotopes, ${}^{60}$Ge and ${}^{62}$Ge, produced in an experiment at the RIKEN Nishina Center. We have improved our knowledge of the half-lives of ${}^{62}$Ge (73.5(1) ms), ${}^{60}$Ge (25.0(3) ms) and its daughter nucleus, ${}^{60}$Ga (69.4(2) ms). We measured individual $\beta$-delayed proton and $\gamma$ 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 $\beta$-delayed proton-emission branching ratio of 67(3)% has been obtained for ${}^{60}$Ge. New information has been obtained on the energy levels populated in ${}^{60}$Ga and on the 1/2${}^{-}$ excited state in the $\beta p$ daughter ${}^{59}$Zn. We extracted a ground state to ground state feeding of 85.3(3)% for the decay of ${}^{62}$Ge. Eight new $\gamma$ lines have been added to the de-excitation of levels populated in the ${}^{62}$Ga daughter.

13 pages, 12 figures, 5 tables. Physical Review C 103, 014324 (2021)

References in corpus (1)

• Nucleosynthesis in Type I X-ray Bursts

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