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Evidence for two distinct chiral doublet bands entirely based on intruder orbitals

H. F. Bai (白洪斐)1, S. Y. Wang (王守宇)1,2,*, Y. Zheng (郑云)3, W. Z. Xu (许文政)1,2, E. H. Wang (王恩宏)1,2, G. S. Li (李广顺)4, B. Qi (亓斌)1,2, C. Liu (刘晨)1,2, X. C. Han (韩星池)1,2 et al.

S. Wang (王硕)1,2, D. P. Sun (孙大鹏)1,2, Z. Q. Li (李志泉)1,2, H. Jia (贾慧)5, X. L. Luo (罗晓丽)1, Y. J. Li (李英健)1, G. Y. Li (李广有)1, X. Liu (刘鑫)1, S. W. Wei (魏苏伟)1, X. Xiao (肖骁)1, S. Q. Zuo (左思琪)1, L. Zhu (祝霖)1, X. G. Wu (吴晓光)3, C. Y. He (贺创业)3, C. B. Li (李聪博)3, H. Y. Wu (吴鸿毅)3,6, T. X. Li (李天晓)3, M. Zheng (郑敏)3, Z. H. Zhao (赵子豪)3, X. H. Zhou (周小红)4, M. L. Liu (柳敏良)4, and Y. H. Zhang (张玉虎)4

  • 1Shandong Provincial Key Laboratory of Nuclear Science, Nuclear Energy Technology and Comprehensive Utilization, Weihai Frontier Innovation Institute of Nuclear Technology, School of Nuclear Science, Energy and Power Engineering, Shandong University, Shandong 250061, People's Republic of China
  • 2WeiHai Research Institute of Industrial Technology, Shandong University, Weihai 264209, People's Republic of China
  • 3China Institute of Atomic Energy, Beijing 102413, People's Republic of China
  • 4Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
  • 5School of Science, Harbin Institute of Technology, Weihai 264209, People's Republic of China
  • 6School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China

  • *Contact author: sywang@sdu.edu.cn
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Phys. Rev. C 113, L061304 – Published 22 June, 2026

DOI: https://doi.org/10.1103/typc-d421

Abstract

Two pairs of doublet bands with opposite parities have been identified in I118 via in-beam γ-ray spectroscopy techniques. The present experimental energy levels and reduced transition probabilities indicate that they are two distinct chiral doublet bands with the πg9/2−1⊗νh11/2 and πh11/21⊗νh11/2 configurations, respectively. This interpretation is further supported by the constrained triaxial covariant density functional theory and triaxial particle rotor model calculations. The present work reports the observation of multiple chiral doublet bands based on different configurations involving only intruder orbitals.

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Phys. Rev. C 113, L061304– Published 22 June, 2026
  • Received 23 January 2025
  • Revised 19 April 2026
  • Accepted 29 May 2026
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