Systematic study of two-proton radioactivity with a screened electrostatic barrier

被引：16
|
作者：
Zou, You-Tian [1 ]
Pan, Xiao [1 ]
Li, Xiao-Hua [1 ,3 ,4 ]
Liu, Hong-Ming [1 ]
Wu, Xi-Jun [2 ]
He, Biao [5 ]
机构：
[1] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China
[2] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China
[3] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China
[4] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Peoples R China
[5] Cent South Univ, Coll Phys & Elect, Changsha 410083, Peoples R China
来源：
CHINESE PHYSICS C | 2021年 / 45卷 / 10期
基金：
中国国家自然科学基金;
关键词：
2p radioactivity; screening effect; Hulthen potential; half-lives; DECAY HALF-LIVES; ALPHA-DECAY; LIGHT NUCLEI; PROTON; EMISSION; ISOTOPES; EQUATION; STATE; MASS;
D O I：
10.1088/1674-1137/ac1b96
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
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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页数：8
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