期刊
CHINESE PHYSICS C
卷 45, 期 10, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1674-1137/ac1b96
关键词
2p radioactivity; screening effect; Hulthen potential; half-lives
资金
- National Natural Science Foundation of China [11205083, 11505100, 11705055]
- Construct Program of the Key Discipline in Hunan Province
- Research Foundation of Education Bureau of Hunan Province, China [18A237]
- Natural Science Foundation of Hunan Province, China [2018JJ3324]
- Innovation Group of Nuclear and Particle Physics in USC
- Shandong Province Natural Science Foundation, China [ZR2015AQ007]
- National Innovation Training Foundation of China [201910555161]
- Opening Project of Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment, University of South China [2019KFZ10]
A phenomenological model based on WKB theory is proposed in this study to investigate the 2p radioactive half-lives of nuclei near or beyond the proton drip line. The model accurately reproduces experimental data and is extended to predict the half-lives of possible 2p radioactive nuclei. The predicted results are in agreement with those obtained using other models such as the Gamow-like model, generalized liquid drop model, Sreeja formula, and Liu formula.
In this study, a phenomenological model is proposed based on Wentzel-Kramers-Brillouin (WKB) theory and applied to investigate the two-proton (2p) radioactive half-lives of nuclei near or beyond the proton drip line. The total diproton-daughter nucleus interaction potential is composed of the Hulthen-type electrostatic term and the centrifugal term. The calculated 2p radioactive half-lives can accurately reproduce the existing 10 experimental datasets of five true 2p radioactive nuclei with sigma = 0.736. In addition, we extend this model to predict the half-lives of possible 2p radioactive nuclei whose 2p radioactivity is energetically allowed or observed but not yet quantified in NUBASE2016. The predicted results are in agreement with those obtained using the Gamow-like model, generalized liquid drop model, Sreeja formula, and Liu formula.
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