Effective proton-neutron interaction in mirror nuclei

被引：0
|
作者：
Xing, Y. M. [1 ,2 ]
Luo, Y. F. [1 ,2 ]
Li, K. H. [1 ,3 ]
Zhang, Y. H. [1 ,2 ]
Li, J. G. [1 ,2 ]
Wang, M. [1 ,2 ]
Litvinov, Yu. A. [1 ,4 ]
Blaum, K. [5 ]
Yan, X. L. [1 ,2 ]
Liao, T. [1 ,2 ]
Zhang, M. [1 ,2 ]
Zhou, X. [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 730000, Peoples R China
[2] Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China
[3] Henan Normal Univ, Inst Particle & Nucl Phys, Xinxiang 453007, Peoples R China
[4] GSI Helmholtzzentrum Schwerionenforsch, Planckstr 1, D-64291 Darmstadt, Germany
[5] Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany
来源：
PHYSICAL REVIEW C | 2025年 / 111卷 / 02期
基金：
国家重点研发计划;
关键词：
STATES; SPECTROSCOPY; DEFORMATION;
D O I：
10.1103/PhysRevC.111.024313
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：
Effective proton-neutron interactions, Vpn, in mirror nuclei are systematically analyzed using the groundstate atomic masses. A mirror symmetry of Vpn is found for bound nuclei with a standard deviation of sigma = 32 keV. However, this mirror symmetry is apparently broken for some mirror-nuclei pairs when a protonunbound nucleus is involved in extracting the Vpn values. Such a mirror-symmetry breaking is attributed to the Thomas-Ehrman shift of the proton-unbound nucleus and is investigated by using the Gamow shell model. It is concluded that the Thomas-Ehrman shift originates mainly from reduced Coulomb energies in the protonunbound nuclei due to the extended radial density distribution of valence protons.
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收藏
页数：6
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