Mass yields and kinetic energy of fragments from fission of highly-excited nuclei with A≲220

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• 作者：V.Yu. Denisov^a ; ^b ; ^{denisov@kinr.kiev.ua} ; T.O. Margitych^a ; I.Yu. Sedykh^c
• 关键词：Fission ; Fusion&ndash ; fission ; Fragment mass distribution
• 刊名：Nuclear Physics A
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：958
• 期：Complete
• 页码：101-128
• 全文大小：1219 K
• 卷排序：958

文摘

It is shown that the potential energy surface of the two separated fragments has the saddle point, which takes place at small distance between the surfaces of well-deformed fragments. The height of this two-body saddle point is larger than the height of one-body fission barrier for nuclei with A≲220A≲220. The mass yields of the fission fragments, which are appearing at the fission of nuclei with A≲220A≲220, are related to the number of states of the two-fragment systems at the two-body saddle points. The characteristics of kinetic energy of fragments are described by using the trajectory motion equations with the dissipation terms. The Gaussian distribution of the final kinetic energy around the classical value of this energy induced by the stochastic fluctuations is taken into account at an evaluation of the total kinetic energy distributions of the fission fragments.