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

Observation and Empirical Shell-Model Study of New Yrast Excited States in the Nucleus¹⁴²Ce

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
Revised: 1900-01-01

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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

Observation and Empirical Shell-Model Study of New Yrast Excited States in the Nucleus¹⁴²Ce

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 of¹⁴²Ce,populated in deep inelastic reactions of⁸²Se projectiles bombarding¹³⁹La 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 Nucleus¹⁴²Ce

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