Possible collective band in neutron-rich^(119)Sn  

作　　者：Da-Peng Sun Hong-Fei Bai Wen-Zheng Xu Shou-Yu Wang Xiao-Guang Wu Hui Jia Chen Liu Bin Qi Guang-Sheng Li Yun Zheng Cong-Bo Li Zhi-Quan Li Shuo Wang Lin Mu Nai-Bo Zhang Rui-Ju Guo Aman Rohilla 孙大鹏;白洪斐;许文政;王守宇;吴晓光;贾慧;刘晨;亓斌;李广生;郑云;李聪博;李志泉;王硕;穆琳;张乃波;郭睿巨;Aman Rohilla(Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment,School of Space Science and Physics,Institute of Space Sciences,Shandong University,Weihai 264209,China;China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment,School of Space Science and Physics,Institute of Space Sciences,Shandong University,Weihai 264209,China [2]China Institute of Atomic Energy,Beijing 102413,China

出　　处：《Chinese Physics C》2022年第9期180-184,共5页中国物理C（英文版）

基　　金：the Major Program of Natural Science Foundation of Shandong Province(ZR2020ZD30);the National Natural Science Foundation of China(12075137,12075138,11975315,U1867210,U1932209);the Young Scholars Program of Shandong University。

摘　　要：Excited states of^(119)Sn have been studied using an in-beamγ-ray spectroscopic technique following the incomplete fusion of 7 Li on a^(116)Cd target at a beam energy of 42 MeV.A new bandlike structure is proposed to result from deformed two-particle-two-hole(2p-2h)proton excitations across the Z=50 closed shell based on the systematics of odd-A Sn isotopes and configuration-fixed constrained triaxial relativistic mean-field calculations.This observation extends the boundaries of the deformed 2p-2h collective band to A=119 in Sn isotopes.

关 键 词：excited state collective band shape coexistence 

分 类 号：O571.5[理学—粒子物理与原子核物理]