Deformed shell model results for two neutrino positron double beta decay of ${}^{74}$Se

Abstract

Half-lives $T_{1/2}^{2\nu }$ for two neutrino positron double beta decay modes ${\beta }^{+}$EC/ECEC are calculated for ${}^{74}$Se, a nucleus of current experimental interest, using deformed shell model based on Hartree-Fock states employing a modified Kuo interaction in (${}^2{p}_{3/2}$, ${}^1{f}_{5/2}$, ${}^2{p}_{1/2}$, ${}^1{g}_{9/2}$) space. The calculated half-life for the ECEC mode is $\sim 10^{26}$yr and it may be possible to observe this in the near future with improved sensitivity of experiments.

Comments: 3 figures