Signatures of shell evolution in alpha decay across the N=126 shell closure
Signatures of shell evolution in alpha decay across the N=126 shell closure
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N=126 壳闭合区域中 α 衰变的壳演化特征
DOI：
10.1088/1674-1137/41/6/064103
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发表时间：
2017
影响因子：
3.6
通讯作者：
Ren Zhong-Zhou
中科院分区：
文献类型：
--
作者：
Rui-Wang;Wang Rui-Yao;Qian Yi-Bin;Ren Zhong-Zhou
在α团簇模型中，我们特别研究了N= 126中子壳层加Z= 82质子壳层附近的奇异核的α衰变。根据实验衰变宽度与计算衰变宽度的比值，导出了表征壳效应的α-预成几率（P α）的系统学。通过对N= 124-130等渗链中P α趋势的比较分析，认为N= 126和Z= 82壳层闭合强烈影响α粒子穿透前的形成。此外，Po和Rn同位素的P α变化也是这种影响的另一个证据。更重要的是，可以得出结论，预期的中子（或质子）壳效应随着价质子（或中子）数的增加而沿着逐渐消失。本文还讨论了P α值的奇偶交错现象。（作者）
Within the alpha-cluster model, we particularly investigate the alpha decay of exotic nuclei in the vicinity of the N= 126 neutron shell plus the Z= 82 proton shell. The systematics of alpha-preformation probability (P α), as an indicator of the shell effect, is deduced from the ratio of the experimental decay width to the calculated one. Through the comparative analysis of the P α trend in the N= 124-130 isotonic chain, the N= 126 and Z= 82 shell closures are believed to strongly affect the formation of the alpha particle before its penetration. Additionally, the P α variety in Po and Rn isotopes is presented as another proof for such an influence. More importantly, it may be concluded that the expected neutron (or proton) shell effect gradually fades away along with the increasing valence proton (or neutron) number. The odd-even staggering presented in the P α value is also discussed.(authors)