A statistical approach to describe highly excited heavy and superheavy nuclei

A statistical approach based on the Weisskopf evaporation theory has been developed to describe the deexcitation process of highly excited heavy and superheavy nuclei, in particular for the proton-rich nuclei. The excited nucleus is cooled by evaporating γ-rays, light particles（neutrons, protons, α...

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Bibliographic Details
Published in:Chinese physics C 2016-09, Vol.40 (9), p.9-14
Main Author: 陈鹏辉 冯兆庆 李君清 张鸿飞
Format: Article
Language:English
Subjects:
γ射线
丰质子核
激发函数
统计方法
能量分离
蒸发冷却
超重核
高激发
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Summary:A statistical approach based on the Weisskopf evaporation theory has been developed to describe the deexcitation process of highly excited heavy and superheavy nuclei, in particular for the proton-rich nuclei. The excited nucleus is cooled by evaporating γ-rays, light particles（neutrons, protons, α etc） in competition with binary fission,in which the structure effects（shell correction, fission barrier, particle separation energy） contribute to the processes.The formation of residual nuclei is evaluated via sequential emission of possible particles above the separation energies.The available data of fusion-evaporation excitation functions in the ^28Si＋^198Pt reaction can be reproduced nicely within the approach.
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/40/9/091002