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arXiv 2007.02302nucl-th
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用RHB方法研究富中子Ge、Se、Kr和Sr核的壳层演化

Shell Evolution in Neutron-rich Ge, Se, Kr and Sr Nuclei within RHB Approach

M. El Adri, M. Oulne

摘要:

利用相对论Hartree-Bogoliubov(RHB)方法,采用密度相关的Meson-Exchange(DD-ME 2)和密度相关的点耦合(DD-PC 1)模型,研究了Z=32 ~ Z=38的奇异偶偶同位素链.通过对两中子分离能、两中子壳隙、中子对能、势能面和中子单粒子能等计算量的分析,再现了经典幻数N=50,并预测了新幻数N=70是一个稳健的壳层闭合数。所得到的结果证实了壳模型计算和有限范围液滴模型(FRDM)的预测与现有的实验数据进行了比较。理论模型与实验结果吻合较好。

英文摘要:

The exotic even-even isotopic chains from Z=32 to Z=38 are investigated by means of the relativistic Hartree-Bogoliubov (RHB) approach with the explicit Density Dependent Meson-Exchange (DD-ME2) and Density Dependent Point-Coupling (DD-PC1) models. The classic magic number N=50 is reproduced and the new number N=70 is predicted to be a robust shell closure by analysing several calculated quantities such as: two-neutron separation energies, two-neutron shell gap, neutron pairing energy, potential energy surface and neutron single particle energies with and without the tensor force. The obtained results are corroborated by shell model calculations and compared with the predictions of finite range droplet model (FRDM) and with the available experimental data. A reasonable and satisfactory agreement between the theoretical models and experiment is established.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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