Shell-model study of $\log ft$ values for ${}^{139,140,141}$Ba $\to$ ${}^{139,140,141}$La transitions

Abstract

In the present work, beta-decay properties such as $\log ft$ values and half-lives have been systematically studied corresponding to Ba isotopes using large-scale shell-model calculations. An extensive comparison of beta decay results corresponding to ${}^{141}$Ba$\to$ ${}^{141}$La using shell-model calculations is made with the recently available experimental data. In addition, we have also calculated the nuclear and beta decay properties corresponding to ${}^{139}$Ba$\to$ ${}^{139}$La and ${}^{140}$Ba$\to$ ${}^{140}$La transitions. The model-space considered here is $Z=50-82$ and $N=82-126$ with ${}^{132}$Sn core, and the interaction employed here is jj56pnb interaction. The beta decay results using shell-model calculations for all the mentioned isotopes are compared with the available experimental data. This is the first theoretical interpretation corresponding to recent experimental data.

26 pages, 7 figures

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