Decay time characteristics of the U-like excited nuclei

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• 作者：Drozdov ; V.A. ; Eremenko ; D.O. ; Fotina ; O.V. ; Giardina ; G. ; Malaguti ; F. ; Platonov ; S.Yu. ; Uguzzoni ; A. ; et. al.
• 关键词：21.10.Tg ; 25.70.Gh ; 25.70.Jj ; 61.80.Mk ; 25.85.&minus ; w ; Nuclear reactions ²³²Th+p ; d ; ³He ; α ; ²⁸Si+^natPt and ²³⁸U+²⁸Si ; Crystal blocking technique ; Induced fission lifetime ; Nuclear vi
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：2003
• 出版时间：December, 2003
• 年：2003
• 卷：212
• 期：Complete
• 页码：501-504
• 全文大小：274 K

文摘

The unified global energy dependence of the induced fission times obtained by the experimental crystal blocking technique for nuclei with Z=91–94 in the range of initial excitation energy from 5 to 250 MeV was analyzed. It was demonstrated that for the energies up to 60–70 MeV the fission times can be described in the frame of the statistical theory taking into account the double-humped structure of the fission barrier and the lifetimes of both classes of excited nuclear states realized in the first and second potential wells. However, for the excitation energies above 70 MeV it is needed to consider the dynamical effects in fission channel.