Observation and Empirical Shell-Model Study of New Yrast Excited States in the Nucleus <SUP>142</SUP>Ce

LIU Zhong; ZHANG Yu-Hu; GUO Ying-Xiang; ZHOU Xiao-Hong; LEI Xiang-Guo; LIU Min-Liang; LUO Wan-Ju; HE Jian-Jun; ZHENG Yong; PAN Qiang-Yan; GAN Zai-Guo; LUO Yi-Xiao

Chinese Physics C> 2002, Vol. 26> Issue(10) : 1015-1020

Observation and Empirical Shell-Model Study of New Yrast Excited States in the Nucleus ¹⁴²Ce

Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 Japan Atomic Energy Research Institute,Tokai,Ibaraki 319 1195,Japan3 Chiba Institute of Technology,Narashino,Chiba 275 0023,Japan

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Abstract：
Excited states of ¹⁴²Ce,populated in deep inelastic reactions of ⁸²Se projectiles bombarding ¹³⁹La target,have been studied to medium spins using in-beam gamma spectroscopy techniques. Three new levels have been identified at 2625,2995 and 3834keV,and assigned as 8⁺,9^(－) and 11^(－),respectively,based on the analysis of the properties of gamma transitions. These new yrast states follow well the level systematics of N=84 isotones. Their structures have been discussed with the help of empirical shell-model calculations.

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LIU Zhong, ZHANG Yu-Hu, GUO Ying-Xiang, ZHOU Xiao-Hong, LEI Xiang-Guo, LIU Min-Liang, LUO Wan-Ju, HE Jian-Jun, ZHENG Yong, PAN Qiang-Yan, GAN Zai-Guo and LUO Yi-Xiao. Observation and Empirical Shell-Model Study of New Yrast Excited States in the Nucleus ¹⁴²Ce[J]. Chinese Physics C, 2002, 26(10): 1015-1020.

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Received: 2001-11-06
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沈阳化工大学材料科学与工程学院沈阳 110142

Observation and Empirical Shell-Model Study of New Yrast Excited States in the Nucleus ¹⁴²Ce

Corresponding author: LIU Zhong,

Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 Japan Atomic Energy Research Institute,Tokai,Ibaraki 319 1195,Japan3 Chiba Institute of Technology,Narashino,Chiba 275 0023,Japan

Received Date: 2001-11-06

Accepted Date: 1900-01-01

Available Online: 2002-10-05

Abstract: Excited states of ¹⁴²Ce,populated in deep inelastic reactions of ⁸²Se projectiles bombarding ¹³⁹La target,have been studied to medium spins using in-beam gamma spectroscopy techniques. Three new levels have been identified at 2625,2995 and 3834keV,and assigned as 8⁺,9^(－) and 11^(－),respectively,based on the analysis of the properties of gamma transitions. These new yrast states follow well the level systematics of N=84 isotones. Their structures have been discussed with the help of empirical shell-model calculations.

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Observation and Empirical Shell-Model Study of New Yrast Excited States in the Nucleus ¹⁴²Ce

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Observation and Empirical Shell-Model Study of New Yrast Excited States in the Nucleus 142Ce

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Observation and Empirical Shell-Model Study of New Yrast Excited States in the Nucleus 142Ce

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Observation and Empirical Shell-Model Study of New Yrast Excited States in the Nucleus ¹⁴²Ce

Observation and Empirical Shell-Model Study of New Yrast Excited States in the Nucleus ¹⁴²Ce