A new isomer in 136 Ba populated by deep inelastic collisions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

A new isomer in 136 Ba populated by deep inelastic collisions

Authors:	T. Shizuma Z. G. Gan K. Ogawa H. Nakada M. Oshima Y. Toh T. Hayakawa Y. Hatsukawa M. Sugawara Y. Utsuno Z. Liu

Affiliation:	(1) Japan Atomic Energy Research Institute, 319-1195 Tokai, Ibaraki, Japan;(2) Institute of Modern Physics, Chinese Academy of Science, 730000 Lanzhou, PRC;(3) Chiba University, Inage-ku, 263-8522 Chiba, Japan;(4) Chiba Institute of Technology, 275-0023 Narashino, Chiba, Japan

Abstract:	Excited states in ¹³⁶Ba, populated in deep inelastic collisions by the interaction of 450 MeV ⁸²Se ions with a ¹³⁹La target, have been studied by means of in-beam -ray spectroscopy. A new isomer with has been identified at an excitation energy E_x = 3.357 MeV. The half-life was determined as $T_{1/2} = 94pm10$ ns. The extracted B(E2) value is much smaller than those in ¹³²Te and ¹³⁴Xe. This hindrance is investigated by a shell model calculation.Received: 22 September 2003, Revised: 11 November 2003, Published online: 6 April 2004PACS: 21.10.Tg Lifetimes - 23.20.Lv transitions and level energies - 27.60. + j

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