High-Spin States in <sup>141</sup>Pm

ZHU Shengjiang(朱胜江); GU Long(顾龙); WANG Jianguo(王建国); XIAO Zhigang(肖志刚); Yeoh Eingyee(杨韵颐); ZHANG Ming(张明); LIU Yu(刘宇); DING Huaibo(丁怀博); ZHU Lihua(竺礼华); WU Xiaoguang(吴晓光); HE Chuangy; et al

doi:10.1088/1009-0630/14/6/13

Plasma Science and Technology > 2012 > 14(6): 496-498. > DOI: 10.1088/1009-0630/14/6/13

ZHU Shengjiang(朱胜江), GU Long(顾龙), WANG Jianguo(王建国), XIAO Zhigang(肖志刚), Yeoh Eingyee(杨韵颐), ZHANG Ming(张明), LIU Yu(刘宇), DING Huaibo(丁怀博), ZHU Lihua(竺礼华), WU Xiaoguang(吴晓光), HE Chuangy, et al. High-Spin States in ¹⁴¹Pm[J]. Plasma Science and Technology, 2012, 14(6): 496-498. DOI: 10.1088/1009-0630/14/6/13

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High-Spin States in ¹⁴¹Pm

1 Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China 2 China Institute of Atomic Energy, Beijing 102413, China

Funds: supported by the National Natural Science Foundation of China (No. 10975082 and 10775078), the Major State Basic Research Development Program ( No. 2007CB815005), and the Special Program of Higher Education Science Foundation (No. 20070003149)

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Received Date: May 16, 2011

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Abstract

Abstract

The high-spin states of ¹⁴¹Pm nucleus have been studied by using in-beam ?-ray spectroscopy technology through the ¹²⁶Te(¹⁹F, 4n) reaction at a beam energy of 90 MeV. The previous level scheme has been extended with spin up to 49/2 ?. Many new levels and transitions are identified. Five collective band structures are observed. Based on systematic comparison with the neighboring nuclei, two bands with strong ?I = 1 M1 transitions inside the bands are proposed as the oblate bands with γ ~ -60°, and three bands with large signature splitting have been suggested as the oblate-triaxial deformation with γ ~ -90°. The characteristics for these bands have been discussed.
- nuclear structure,
- high spin states,
- oblate band,
- oblate-triaxial band

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