Collective Dand Structures in Doubly Odd 136La Nucleus |
| |
| Authors: | ZHU Sheng-Jiang XIAO Shu-Dong CHE Xing-Lai YU Ying-Nan LI Ming-Liang CHEN Yong-Jing ZHU Li-Hua WEN Shu-Xian WU Xiao-Guang LI Guang-Sheng |
| |
| Affiliation: | Department of Physics, Tsinghua University, Beijing 100084, China2 China Institute of Atomic Energy, Beijing 102413, China |
| |
| Abstract: | Using heavy-ion nuclear reaction and in-beam γ-ray spectroscopy technique,high spin states of 136La have been studied. The nuclear reaction used is 130Te(11B,5n) with a beam energy 60MeV. The level scheme with three collective band structures has been updated with spin up to 20h. The collective backbending has been observed in $uppi h_{11/2}otimes upnu h_{11/2}$ band. According to the TRS calculations，this backbending is due to the alignment of a pair of h11/2 neutrons. The signature splitting and inversion for the $uppi h_{11/2}otimes upnu h_{11/2}$ band were also discussed. Other two bands based on $12^-$ and $16^+$ levels were proposed as oblate deformation with $gammaapprox -60^circ$. They most probably originate from four- and six- quasiparticle configurations, that is,$uppi h_{11/2}otimesupnu g_{7/2} h_{11/2}^2$ and $uppi g_{7/2}otimesupnu g_{7/2}^2 d_{5/2}h_{11/2}^2$ respectively. |
| |
| Keywords: | |
|
| 点击此处可从《中国物理C(英文版)》浏览原始摘要信息 |
|
点击此处可从《中国物理C(英文版)》下载免费的PDF全文 |
|
