Systematic study on the proton radioactivity of spherical proton emitters

In this study, based on a two-potential approach, we systematically investigated the proton radioactivity half-lives of spherical proton emitters with 69 =Z = 81 from the ground and/or isomeric state, choosing the nuclear potential to be a modified Woods-Saxon potential that contains the isospin effect of the daughter nucleus. It was found that the calculated half-lives could reproduce the experimental data well. Furthermore, we extended this model to predict the half-lives of 17 proton emitting candidates whose radioactivity is energetically allowed or observed but not yet quantified in NUBASE2020. For comparison, the unified fission model, Coulomb potential and proximity potential model, universal decay law for proton emission, and new Geiger-Nuttall law were also used. All the predicted results are consistent with each other.

Automated summary

In this study, the proton radioactivity half-lives of spherical proton emitters with 69 =Z = 81 were systematically investigated using a two-potential approach. The calculated half-lives were found to accurately reproduce the experimental data. Additionally, the model was extended to predict the half-lives of 17 proton emitting candidates not yet quantified in NUBASE2020, and the predicted results were consistent with other models used for comparison.