Magicity of neutron-rich nuclei within relativistic self-consistent approaches

Magicity of neutron-rich nuclei within relativistic self-consistent approaches
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相对论自洽方法中富中子核的魔力

DOI:
10.1016/j.physletb.2015.12.004
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发表时间:
2015-07
期刊:
影响因子:
4.4
通讯作者:
Nguyen Van Giai
Nguyen Van Giai
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Jia Jie Li;Jerome Margueron;Wen Hui Long;Nguyen Van Giai

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利用相对论Hartree-Fock-Bogoliubov理论研究了中等质量丰中子核中新壳层能隙的形成,分析了Lorentz赝矢量和张量相互作用的作用.基于Foldy-Wouthuysen变换,我们详细讨论了Lorentz赝矢量和张量相互作用的不同项在3,32和34壳层能隙出现中所起的作用. O、Si和Ca核具有大的壳能隙和零(O,Ca)或几乎零(Si,Ca)对能隙,使它们成为奇异核中新幻数的候选核。我们发现,从我们的分析,洛伦兹赝矢量和张量相互作用诱导非常具体的单粒子能量的演变,这可以清楚地表明它们的存在,并揭示了需要相对论方法与交换相互作用。
The formation of new shell gaps in intermediate mass neutron-rich nuclei is investigated within the relativistic Hartree-Fock-Bogoliubov theory, and the role of the Lorentz pseudo-vector and tensor interactions is analyzed. Based on the Foldy-Wouthuysen transformation, we discuss in detail the role played by the different terms of the Lorentz pseudo-vector and tensor interactions in the appearing of the, 32 and 34 shell gaps. The nucleiO,Si andCa are predicted with a large shell gap and zero (O,Ca) or almost zero (Si,Ca) pairing gap, making them candidates for new magic numbers in exotic nuclei. We find from our analysis that the Lorentz pseudo-vector and tensor interactions induce very specific evolutions of single-particle energies, which could clearly sign their presence and reveal the need for relativistic approaches with exchange interactions.
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