Shell evolution at N = 20 in the constrained relativistic mean field approach*
Shell evolution at N = 20 in the constrained relativistic mean field approach*
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DOI：
10.1088/1674-1137/32/11/007
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发表时间：
2008-11
影响因子：
3.6
通讯作者：
Sun Bao-hua;Li Jian
中科院分区：
文献类型：
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作者：
Sun Bao-hua;Li Jian
用约束相对论平均场(RMF)理论研究了在丰中子核素中实验观测到的消失的中子幻数N=20时的壳层演化。实验观察到的壳层闭合向中子滴线的趋势是可以重现的。给出了预测的双中子分离能、中子壳能隙和基态形变参数。这些结果与最近的Hartree-Fock-Bogliubov(HFB-14)模型和现有的实验数据进行了比较。讨论了更好地理解壳层演化的前景。
The shell evolution at N = 20, a disappearing neutron magic number observed experimentally in very neutron-rich nuclides, is investigated in the constrained relativistic mean field (RMF) theory. The trend of the shell closure observed experimentally towards the neutron drip-line can be reproduced. The predicted two-neutron separation energies, neutron shell gap energies and deformation parameters of ground states are shown as well. These results are compared with the recent Hartree-Fock-Bogliubov (HFB-14) model and the available experimental data. The perspective towards a better understanding of the shell evolution is discussed.