Doublet bands at borders of A ≈ 130 island of chiral candidates: Case study of 120I  

作　　者：Rui Guo Yong-Hao Liu Jian Li Wu-Ji Sun Li Li Ying-Jun Ma 郭瑞;刘永好;李剑;孙无忌;李黎;马英君(College of Physics,Jilin University,Changchun 130012,China;Department of Physics,Western Michigan University,Kalamazoo,MI 4900&USA)

机构地区：[1]College of Physics,Jilin University,Changchun 130012,China [2]Department of Physics,Western Michigan University,Kalamazoo,MI 4900&USA

出　　处：《Chinese Physics C》2020年第7期95-102,共8页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(11675063,11205068,11475072,11847310)。

摘　　要：Positive-parity doublet bands were reported in 120I.Based on these,we discuss the corresponding experimental characteristics,including rotational alignment,and re-examine the corresponding configuration assignment.The self-consistent tilted axis cranking relativistic mean-field calculations indicate that the doublet bands are built on the configurationπh11/2νh11/2^-1.By adopting the two quasiparticles coupled with a triaxial rotor model,the excitation energies,energy staggering parameter S(I),B(M1)/B(E2),effective angles,and K plots are discussed and compared with available data.The obtained results support the interpretation of chiral doublet bands for the positive-parity doublet bands in 120I,and hence identify this nucleus as the border of the A≈130 island of chiral candidates.

关 键 词：chiral doublet bands particle rotor model cranking relativistic mean-field theory high-j particle hole configuration 

分 类 号：O571.2[理学—粒子物理与原子核物理]