A statistical approach to describe highly excited heavy and superheavy nuclei

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Peng-Hui Chen, Zhao-Qing Feng, Jun-Qing Li and Hong-Fei Zhang. A statistical approach to describe highly excited heavy and superheavy nuclei[J]. Chinese Physics C, 2016, 40(9): 091002. doi: 10.1088/1674-1137/40/9/091002
Peng-Hui Chen, Zhao-Qing Feng, Jun-Qing Li and Hong-Fei Zhang. A statistical approach to describe highly excited heavy and superheavy nuclei[J]. Chinese Physics C, 2016, 40(9): 091002.  doi: 10.1088/1674-1137/40/9/091002 shu
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Received: 2016-04-11
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    Supported by Major State Basic Research Development Program in China (2015CB856903), National Natural Science Foundation of China Projects (11175218, U1332207, 11475050, 11175074), and Youth Innovation Promotion Association of Chinese Academy of Sciences

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A statistical approach to describe highly excited heavy and superheavy nuclei

    Corresponding author: Zhao-Qing Feng,
Fund Project:  Supported by Major State Basic Research Development Program in China (2015CB856903), National Natural Science Foundation of China Projects (11175218, U1332207, 11475050, 11175074), and Youth Innovation Promotion Association of Chinese Academy of Sciences

Abstract: A statistical approach based on the Weisskopf evaporation theory has been developed to describe the de-excitation 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.

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