Doublet bands at borders of A ≈ 130 island of chiral candidates: Case study of 120I Supported by the National Natural Science Foundation of China (11675063, 11205068, 11475072, 11847310)

• Published in: Chinese physics C Vol. 44; no. 7
• Main Authors: Guo, Rui, Liu, Yong-Hao, Li, Jian, Sun, Wu-Ji, Li, Li, Ma, Ying-Jun
• Format: Journal Article
• Language: English
• Published: Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd 01.07.2020
• Subjects: chiral doublet bands; cranking relativistic mean-field theory; high; particle hole configuration; particle rotor model
• ISSN: 1674-1137
• DOI: 10.1088/1674-1137/44/7/074102

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 configuration . By adopting the two quasiparticles coupled with a triaxial rotor model, the excitation energies, energy staggering parameter S(I), , 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.