Study of Multi-Quasiparticle Excited States in <SUP>139</SUP>Ce

HUA Wei; ZHOU Xiao-Hong; ZHANG Yu-Hu; GUO Ying-Xiang; LEI Xiang-Guo; XIE Cheng-Ying; SONG Li-Tao; WANG Hua-Lei

Chinese Physics C> 2007, Vol. 31> Issue(4) : 357-360

Study of Multi-Quasiparticle Excited States in ¹³⁹Ce

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China

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Abstract：
High-spin states in ¹³⁹Ce have been populated using the ¹³⁰Te(¹²C,3n) reaction at beam energy of 50MeV. The level scheme of ¹³⁹Ce has been revised and extended greatly up to E=5765.0keV. The level structure of ¹³⁹Ce shows typical characteristics of spherical nucleus, and the high-spin states were formed by the excitations of valence nucleons. Energies of the yrast and near yrast high-spin states in ¹³⁹Ce have been calculated by the empirical shell model, and the multi-quasiparticle nature of high-spin excited states has been discussed.

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HUA Wei, ZHOU Xiao-Hong, ZHANG Yu-Hu, GUO Ying-Xiang, LEI Xiang-Guo, XIE Cheng-Ying, SONG Li-Tao and WANG Hua-Lei. Study of Multi-Quasiparticle Excited States in ¹³⁹Ce[J]. Chinese Physics C, 2007, 31(4): 357-360.

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Received: 2006-06-01
Revised: 2006-08-22

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Study of Multi-Quasiparticle Excited States in ¹³⁹Ce

Corresponding author: ZHOU Xiao-Hong,

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2006-06-01

Accepted Date: 2006-08-22

Available Online: 2007-04-05

Abstract: High-spin states in ¹³⁹Ce have been populated using the ¹³⁰Te(¹²C,3n) reaction at beam energy of 50MeV. The level scheme of ¹³⁹Ce has been revised and extended greatly up to E=5765.0keV. The level structure of ¹³⁹Ce shows typical characteristics of spherical nucleus, and the high-spin states were formed by the excitations of valence nucleons. Energies of the yrast and near yrast high-spin states in ¹³⁹Ce have been calculated by the empirical shell model, and the multi-quasiparticle nature of high-spin excited states has been discussed.

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Study of Multi-Quasiparticle Excited States in 139Ce

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Study of Multi-Quasiparticle Excited States in ¹³⁹Ce

Study of Multi-Quasiparticle Excited States in ¹³⁹Ce