Nuclear β+/EC decays in covariant density functional theory and the impact of isoscalar proton-neutron pairing

被引：53
|
作者：
Niu, Z. M. [1 ]
Niu, Y. F. [2 ]
Liu, Q. [1 ]
Liang, H. Z. [3 ,4 ]
Guo, J. Y. [1 ]
机构：
[1] Anhui Univ, Sch Phys & Mat Sci, Hefei 230039, Peoples R China
[2] China Acad Engn Phys, Inst Fluid Phys, Mianyang 621900, Peoples R China
[3] RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan
[4] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
来源：
PHYSICAL REVIEW C | 2013年 / 87卷 / 05期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1103/PhysRevC.87.051303
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：
Self-consistent proton-neutron quasiparticle random phase approximation based on the spherical nonlinear point-coupling relativistic Hartree-Bogoliubov theory is established and used to investigate the beta(+)/electron-capture ( EC)-decay half-lives of neutron-deficient Ar, Ca, Ti, Fe, Ni, Zn, Cd, and Sn isotopes. The isoscalar proton-neutron pairing is found to play an important role in reducing the decay half-lives, which is consistent with the same mechanism in the beta decays of neutron-rich nuclei. The experimental beta(+)/EC-decay half-lives can be well reproduced by a universal isoscalar proton-neutron pairing strength.
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收藏
页数：5
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