High-K multi-particle bands and pairing reduction in 254No  

作　　者：Xiao-Tao He Shu-Yong Zhao Zhen-Hua Zhang Zhong-Zhou Ren 贺晓涛;赵树勇;张振华;任中洲(College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Mathematics and Physics Department,North China Electric Power University,Beijing 102206,China;School of Physics Science and Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China [2]Mathematics and Physics Department,North China Electric Power University,Beijing 102206,China [3]School of Physics Science and Engineering,Tongji University,Shanghai 200092,China

出　　处：《Chinese Physics C》2020年第3期111-118,共8页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(11775112,11535004,11875027,11761161001);the Priority Academic Program Development of Jiangsu Higher Education Institutions

摘　　要：The multi-particle states and rotational properties of the two-particle bands in 254No are investigated by the cranked shell model with pairing correlations treated by the particle number conserving method. The rotational bands on top of the two-particle Kπ= 3+, 8- and 10+ states and the pairing reduction are studied theoretically in 254No for the first time. The experimental excitation energies and moments of inertia of the multi-particle states are reproduced well by the calculations. Better agreement with the data is achieved by including the high-order deformation ε6,J（1） in these two-particle bands compared with the ground state band is attributed to the pairing reduction due to the Pauli blocking effect.The multi-particle states and rotational properties of the two-particle bands in 254No are investigated by the cranked shell model with pairing correlations treated by the particle number conserving method.The rotational bands on top of the two-particle K^π=3^+,8^− and 10^+ states and the pairing reduction are studied theoretically in 254No for the first time.The experimental excitation energies and moments of inertia of the multi-particle states are reproduced well by the calculations.Better agreement with the data is achieved by including the high-order deformation ε6,which leads to enlarged Z=100 and N=152 deformed shell gaps.An increase of J^(1) in these two-particle bands compared with the ground state band is attributed to the pairing reduction due to the Pauli blocking effect.

关 键 词：rotational band spin assignment band-crossing high-j orbital transfermium nuclei nuclear deformation 

分 类 号：O572.2[理学—粒子物理与原子核物理]