A statistical approach to describe highly excited heavy and superheavy nuclei

Peng-Hui Chen; Zhao-Qing Feng; Jun-Qing Li; Hong-Fei Zhang

doi:10.1088/1674-1137/40/9/091002

Chinese Physics C> 2016, Vol. 40> Issue(9) : 091002 DOI: 10.1088/1674-1137/40/9/091002

A statistical approach to describe highly excited heavy and superheavy nuclei

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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.
- excited nucleus ,
- structure effects ,
- Weisskopf evaporation theory ,
- fusion-evaporation reactions

References

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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

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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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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

A statistical approach to describe highly excited heavy and superheavy nuclei

Corresponding author: Zhao-Qing Feng,

Received Date: 2016-04-11

Available Online: 2016-09-05

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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A statistical approach to describe highly excited heavy and superheavy nuclei

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