Chinese Physics C > 2004, Vol. 28 > Issue(S1): 62-65

Empirical Shell Model and High-Spin Level Structure of Near-spherical Nucleus¹⁴²Pm

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 China Institute of Atomic Energy, Beijing 102413, China

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Abstract：
In-beam γ-ray spectroscopy experiment for odd-odd nucleus ¹⁴²Pm has been performed via the ¹²⁸Te( ¹⁹F,5n) ¹⁴²Pm reaction. Detailed analysis of γ-γ coincidence relationships leads to a revised high-spin level scheme for ¹⁴²Pm above the previously known 2 ms 8 ^－isomer. The πh _11/2νh _11/2 ^－1multiplet and the (πg _7/2－1νh _11/2 ^－1)_{9^-} state in this nucleus have been identified based on systematic of corresponding states in neighboring odd-odd nuclei. Configurations of several levels have been suggested from an empirical shell model approach. The 67-μs isomer is proposed to be a fully-aligned 4-hole state with predominantly the ((\pi g_{7/2}^{-1}d_{5/2}^{-2})_{15/2^+}\otimes \upnu h_{11/2}^{-1})_{13^-} configuration.

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LIU Min-Liang, ZHANG Yu-Hu, ZHOU Xiao-Hong, GUO Ying-Xiang, LIU Zhong, LEI Xiang-Guo, HE Jian-Jun, ZHENG Yong, ZHU Li-Hua and WEN Shu-Xian. Empirical Shell Model and High-Spin Level Structure of Near-spherical Nucleus ¹⁴²Pm[J]. Chinese Physics C, 2004, 28(S1): 62-65.

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Received: 2004-12-30
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Empirical Shell Model and High-Spin Level Structure of Near-spherical Nucleus¹⁴²Pm

Corresponding author:LIU Min-Liang,

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 China Institute of Atomic Energy, Beijing 102413, China

Received Date:2004-12-30
Accepted Date:1900-01-01
Available Online:2004-04-02

Abstract:In-beam γ-ray spectroscopy experiment for odd-odd nucleus¹⁴²Pm has been performed via the¹²⁸Te(¹⁹F,5n)¹⁴²Pm reaction. Detailed analysis of γ-γ coincidence relationships leads to a revised high-spin level scheme for¹⁴²Pm above the previously known 2 ms 8^－isomer. The πh_11/2νh_11/2^－1multiplet and the (πg_7/2－1νh_11/2^－1)_{9^-} state in this nucleus have been identified based on systematic of corresponding states in neighboring odd-odd nuclei. Configurations of several levels have been suggested from an empirical shell model approach. The 67-μs isomer is proposed to be a fully-aligned 4-hole state with predominantly the ((\pi g_{7/2}^{-1}d_{5/2}^{-2})_{15/2^+}\otimes \upnu h_{11/2}^{-1})_{13^-} configuration.