Empirical Shell Model and High-Spin Level Structure of Near-spherical Nucleus <SUP>142</SUP>Pm

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; WEN Shu-Xian

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

Empirical Shell Model and High-Spin Level Structure of Near-spherical Nucleus ¹⁴²Pm

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 ¹⁴² Pm 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^－1 multiplet 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 Nucleus ¹⁴²Pm

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 nucleus ¹⁴² Pm 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^－1 multiplet 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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Empirical Shell Model and High-Spin Level Structure of Near-spherical Nucleus ¹⁴²Pm

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Empirical Shell Model and High-Spin Level Structure of Near-spherical Nucleus ¹⁴²Pm

Empirical Shell Model and High-Spin Level Structure of Near-spherical Nucleus ¹⁴²Pm