Forbidden beta decay properties of 135,137Te using shell-model.

In this work, the large-scale shell-model calculations for β -decay properties have been done. The β -delayed γ -ray spectroscopy has been performed recently at ILL, Grenoble [M. Si et al. , Phys. Rev. C 106 , 014302 (2022)] to study β -decay properties corresponding to 137Te ((7 / 2 −)) → 137I (J f) transitions. We have done systematic shell-model study for nuclear structure properties and compared the obtained results with the experimental data. Finally, the β -decay properties such as the log ⁡ f t values and average shape factors have been reported. This is the first theoretical calculation for the log ⁡ f t values corresponding to these new experimental data. In addition, we have also reported calculated log ⁡ f t results for 135Te ((7 / 2 −)) → 135I (J f) transitions. [ABSTRACT FROM AUTHOR]