期刊
CHINESE PHYSICS C
卷 45, 期 12, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1674-1137/ac2425
关键词
two-proton radioactivity; released energy; half-life; unified fission model; analytical formula
资金
- National Natural Science Foundation of China [U1832120, 11675265]
- Natural Science Foundation for Outstanding Young Scholars of Hebei Province of China [A2020210012, A2018210146]
- Natural Science Foundation of Hebei Province of China [A2021210010]
- Continuous Basic Scientific Research Project [WDJC-2019-13]
- Leading Innovation Project [LC 192209000701]
A unified fission model is applied to study two-proton radioactivity of nuclei, showing good agreement between experimental and calculated half-lives. The model accurately predicts half-lives of ground states and performs better than analytical formulas for excited states. The parameters in the formulas do not align with the mechanism of quantum tunneling and were obtained without experimental data from excited states.
A unified fission model is extended to study two-proton radioactivity of the ground states of nuclei, and a good agreement between the experimental and calculated half-lives is found. The two-proton radioactivity half-lives of the ground states of some probable candidates are predicted within this model by inputting the released energies taken from the AME2020 table. It is shown that the predictive accuracy of the half-lives is comparable to those of other models. Then, two-proton radioactivity of the excited states of O-14, Ne-17,Ne-18, Mg-22, S-29, and Ag-94 is discussed within the unified fission model and two analytical formulas. It is found that the experimental half-lives of the excited states are reproduced better within the unified fission model. Furthermore, the two formulas are not suitable for the study of two-proton radioactivity of excited states because their physical appearance deviates from the mechanism of quantum tunneling, and the parameters involved are obtained without including experimental data from the excited states.
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