Shell-model study of log⁡ft values for 139,140,141Ba → 139,140,141La 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 ¹⁴¹Ba → ¹⁴¹La 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 ¹³⁹Ba → ¹³⁹La and ¹⁴⁰Ba → ¹⁴⁰La transitions. The model-space considered here is $Z=50-82$ and $N=82-126$ with ¹³²Sn 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.