| α particle preformation and shell effect for heavy and superheavy nuclei |
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| 引用本文： | 赵言炜,郭树青,张鸿飞.α particle preformation and shell effect for heavy and superheavy nuclei[J].中国物理C（英文版）,2018,42(7):074103-074103. |
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| 作者姓名： | 赵言炜 郭树青 张鸿飞 |
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| 摘 要： | The α particle preformation factor is extracted within a generalized liquid drop model for Z = 84-92 isotopes and N = 126,128,152,162,176,184 isotones.The calculated results show clearly that the shell effects play a key role in α particle preformation.The closer the proton and neutron numbers are to the magic numbers,the more difficult the formation of the α cluster inside the mother nucleus is.The preformation factors of the isotopes reflect that N = 126 is a magic number for Po,Rn,Ra,and Th isotopes,but for U isotopes the weakening of the influence of the N =126 shell closure is evident.The trend of the factors for N = 126 and N = 128 isotones also support this conclusion.We extend the calculations for N = 152,162,176,184 isotones to explore the magic numbers for heavy and superheavy nuclei,which are probably present near Z = 108 to N = 152,162 isotones and Z = 116 to N = 176,184 isotones.The results also show that another subshell closure may exist after Z = 124 in the superheavy nuclei.This is useful for future experiments.
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| 收稿时间： | 2018-07-05 |
α particle preformation and shell effect for heavy andsuperheavy nuclei |
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| Yan-Wei Zhao,Shu-Qing Guo,Hong-Fei Zhang.α particle preformation and shell effect for heavy andsuperheavy nuclei[J].Chinese Physics C,2018,42(7):074103-074103. |
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| Authors: | Yan-Wei Zhao Shu-Qing Guo Hong-Fei Zhang |
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| Institution: | 1. School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China2. School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China3. Joint Department for Nuclear Physics, Lanzhou University and Institute of Modern Physics, CAS, Lanzhou 730000, China |
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| Abstract: | The α particle preformation factor is extracted within a generalized liquid drop model for Z=84-92 isotopes and N=126, 128, 152, 162, 176, 184 isotones. The calculated results show clearly that the shell effects play a key role in α particle preformation. The closer the proton and neutron numbers are to the magic numbers, the more difficult the formation of the α cluster inside the mother nucleus is. The preformation factors of the isotopes reflect that N=126 is a magic number for Po, Rn, Ra, and Th isotopes, but for U isotopes the weakening of the influence of the N=126 shell closure is evident. The trend of the factors for N=126 and N=128 isotones also support this conclusion. We extend the calculations for N=152, 162, 176, 184 isotones to explore the magic numbers for heavy and superheavy nuclei, which are probably present near Z=108 to N=152, 162 isotones and Z=116 to N=176, 184 isotones. The results also show that another subshell closure may exist after Z=124 in the superheavy nuclei. This is useful for future experiments. |
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| Keywords: | particle preformation generalized liquid drop model shell effect magic number |
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