Multiple chiral doublet bands with octupole correlations in reflection-asymmetric triaxial particle rotor model

被引：37
|
作者：
Wang, Y. Y. [1 ]
Zhang, S. Q. [2 ]
Zhao, P. W. [2 ]
Meng, J. [1 ,2 ,3 ]
机构：
[1] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China
[2] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
[3] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan
来源：
PHYSICS LETTERS B | 2019年 / 792卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
PROJECTED SHELL-MODEL; ROTATION; GEOMETRY; NUCLEI;
D O I：
10.1016/j.physletb.2019.04.014
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A reflection-asymmetric triaxial particle rotor model (RAT-PRM) with a quasi-proton and a quasi-neutron coupled with a reflection-asymmetric triaxial rotor is developed and applied to investigate the multiple chiral doublet (M chi D) bands candidates with octupole correlations in Br-78. The calculated excited energies, energy staggering parameters, and B(M1)/B(E2) ratios are in a reasonable agreement with the data of the chiral doublet bands with positive- and negative-parity. It is found that both the triaxial deformation gamma and octupole deformation beta(3) influence the calculated B(E1) values. The chiral geometry based on the angular momenta for the rotor, the valence proton and valence neutron is discussed in details. (C) 2019 The Author(s). Published by Elsevier B.V.
引用
收藏
页码：454 / 460
页数：7
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