Shell evolution approaching the N = 20 island of inversion: Structure of Mg 29
Shell evolution approaching the N = 20 island of inversion: Structure of Mg 29
复制标题
接近 N = 20 反转岛的壳演化：Mg 29 的结构
DOI：
10.1103/physrevc.99.044320
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发表时间：
2019
影响因子：
3.1
通讯作者：
Matta A
中科院分区：
文献类型：
--
作者：
Matta A
丰中子核附近的反转孤岛已成为我们理解和模拟同位旋壳层演化的最佳试验场。在这种情况下，过渡核的结构是至关重要的。本文报道了首次利用反应数据对单粒子结构的定量测量。在()和MeV()处确定了具有显著(-波)强度的两个关键态。进行了最新的壳层模型计算，并与实验结果进行了详细的比较。虽然最低的两个能级得到了很好的描述，但两个能级的单粒子强度共享与实验结果不一致，而且涉及中子轨道和核激发成分的组态似乎存在普遍问题。对壳层模型计算中的中子占有率的分析支持了这些结论。
The island of inversion for neutron-rich nuclei in the vicinity ofhas become the testing groundpar excellencefor our understanding and modeling of shell evolution with isospin. In this context, the structure of the transitional nucleusis critical. The first quantitative measurements of the single-particle structure ofare reported, using data from thereaction. Two key states carrying significant(-wave) strength were identified at() andMeV (). New state-of-the-art shell-model calculations have been performed and the predictions are compared in detail with the experimental results. While the two lowestlevels are well described, the sharing of single-particle strength disagrees with experiment for both theandlevels and there appear to be general problems with configurations involving theneutron orbital and core-excited components. These conclusions are supported by an analysis of the neutron occupancies in the shell-model calculations.