Abstract
In this study, based on a two-potential approach, we systematically investigated the proton radioactivity half-lives of spherical proton emitters with \(69\le Z \le 81\) 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.
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Data availability statement
The data that support the findings of this study are openly available in Science Data Bank at https://www.doi.org/10.57760/sciencedb.j00186.00058 and http://resolve.pid21.cn/31253.11.sciencedb.j00186.00058.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Lin-Jing Qi, De-Xing Zhu, Yang-Yang Xu, Song Luo and Xiao-Hua Li. The first draft of the manuscript was written by Dong-Meng Zhang, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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This work was supported in part by the National Natural Science Foundation of China (Nos. 12175100 and 11975132), the Construct Program of the Key Discipline in Hunan Province, the Research Foundation of Education Bureau of Hunan Province, China (Nos. 21B0402 and 18A237), the Natural Science Foundation of Hunan Province, China (No. 2018JJ2321), the Innovation Group of Nuclear and Particle Physics in USC, the Shandong Province Natural Science Foundation, China (No. ZR2022JQ04), the Hunan Provincial Innovation Foundation for Postgraduates (No. CX20220993), and the Opening Project of Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment, University of South China (No. 2019KFZ10).
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Zhang, DM., Qi, LJ., Zhu, DX. et al. Systematic study on the proton radioactivity of spherical proton emitters. NUCL SCI TECH 34, 55 (2023). https://doi.org/10.1007/s41365-023-01201-7
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DOI: https://doi.org/10.1007/s41365-023-01201-7