Re-examination of & beta;-decay in Hg, Pb and Po Isotopes

This study re-examines the effect of nuclear deformation on the calculated Gamow-Teller (GT) strength distributions of neutron-deficient (Hg178-192, Pb185-194 and Po196-206) nuclei. The nuclear ground state properties and shape parameters were calculated using the Relativistic Mean Field model. Three different density-dependent interactions ((DC)-C-3, DD-ME2 and DD-PC1) were used in the calculation. Estimated shape parameters were later used within the framework of deformed proton-neutron quasi-random phase approximations model, with a separable interaction, to calculate the GT strength distributions, half-lives and branching ratios for these neutron-deficient isotopes. It was concluded that half-lives and GT strength distributions vary considerably with change in shape parameter.

Automated summary

This study examines the impact of nuclear deformation on the GT strength distributions of neutron-deficient nuclei. Calculations were done using the Relativistic Mean Field model to determine the ground state properties and shape parameters. The deformed proton-neutron quasi-random phase approximations model was then used to calculate the GT strength distributions, half-lives, and branching ratios. The findings show significant variation in half-lives and GT strength distributions with changes in shape parameters.