First observation of high-spin states in the N = 83 nucleus 142Pr

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First observation of high-spin states in the N = 83 nucleus 142Pr

Li, Zhi-Quan; Wang, Shou-Yu; Guan, Jian-Zhuo; Zhang, Wen-Jun; Liu, Tong; Qi, Bin; Wang, Shuo; Sun, Da-Peng; Liu, Lei; Liu, Chen; Zhang, Pan; Zhang, Nai-Bo; Jia, Hui; Zhang, Ya-Mei; Guo, Rui-Ju; Xiao, Xiao; Han, Xing-Chi; Niu, Chen-Yang; Chen, Zhi-Qiang; Lv, Pin; Li, Chuan-Yang; Wu, Xiao-Guang; Li, Guang-Sheng; He, Chuang-Ye; Zheng, Yun; Li, Cong-Bo; Li, Hong-Wei; Luo, Peng-Wei

Journal of physics. G, Nuclear and particle physics, 08/2019, Volume: 46, Issue: 10

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High-spin states of the N = 83 nucleus 142Pr have been observed for the first time using the 138Ba(7Li, 3n) reaction at a beam energy of 38 MeV. A total of 40 new transitions and 22 new levels have been identified, leading to a considerable extension of the level scheme of 142Pr. The experimental level structures of 142Pr are compared with its neighboring N = 83 isotones 144Pm and 146Eu. Shell model calculations employing the jj56pna interaction reproduce the experimental findings and provide guidance in the interpretation of the observed high-spin level structures.

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