New yrast excited states of the N = 84 nucleus 142Ce observed in deep inelastic reactions期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

New yrast excited states of the N = 84 nucleus 142Ce observed in deep inelastic reactions

Authors:	Z. Liu Y.H. Zhang X.H. Zhou M.L. Liu W.J. Luo Q.Y. Pan Z.G. Gan T. Hayakawa M. Oshima Y. Toh T. Shizima Y. Hatsukawa A. Osa T. Ishii M. Sugawara

Affiliation:	(1) Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, PRC, CN;(2) Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan, JP;(3) Chiba Institute of Technology, Narashino, Chiba 275-0023, Japan, JP

Abstract:	Excited states of ¹⁴²Ce, populated in deep inelastic reactions of ⁸²Se projectiles bombarding ¹³⁹La target, have been studied up to medium spins using in-beam γ spectroscopy techniques. Three new levels have been identified at 2625, 2995, 3834 keV, and assigned as 8⁺, 9^(-) and 11^(-), respectively. These new yrast states follow closely the level systematics of the even mass N = 84 isotones. Their strctures have been discussed with the help of empirical shell model calculations. Received: 2 November 2001 / Accepted: 15 January 2002

Keywords:	PACS. 21.60.Cs Shell model – 23.20.Lv Gamma transitions and level energies – 27.60.+j 90 ?A? 149
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