High-spin states and band structures in the odd-odd 140Pm nucleus

作     者：WANG Jian-Guo~1 ZHU Sheng-Jiang~(1,*) Gu Long~1 Xiao Zhi-Gang~1 Yang Yun-Yi~1 Zhang Ming~1 Liu Yu~1 Ding Hui-Bo~1 Xu Qiang~1 Zhu Li-hua~2 Wu Xiao-Guang~2 Chen Yong-Shou~2 He Chuang-Ye~2 Li Guang-Sheng~2 Wang Lie-Lin~2 Zheng Yun~2 Zhang Biao~2 1(Department of Physics,Tsinghua University,Beijing 100084,People's Republic of China) 2(China Institute of Atomic Energy,Beijing 102113,People's Republic of China) 

会议名称：《第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会》

会议日期：2010年

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 

关 键 词：High-spin state fusion-evaporation reaction oblate band 

摘      要：The light rare earth nuclei with A～140 are located at a transitional region with the neutron numbers approaching the N = 82 closed *** low spins,the single-particle motion will be *** high spins,the proton Fermi surface lies near the lower h midshell and the neutron Fermi surface lies near the h upper *** alignment of a pair of protons tends to drive the nucleus toward to a prolate shape（γ～0°） and the alignment of a pair of neutrons tends to drive the nucleus to oblate shape（γ～—60°）. In the N = 79 isotones,the high spin states have been investigated extensively in La,Ce,Pr and Nd .Many interesting collective bands were ***,contrasting to the neighboring nuclei,the information of high spin states in the Z = 61 isotone Pm is still lacking,and needs to be further investigated. Here we report on the re-investigation of the high-spin states of Pm.