Giant halo at the neutron drip line in Ca isotopes in relativistic continuum Hartree-Bogoliubov theory
Giant halo at the neutron drip line in Ca isotopes in relativistic continuum Hartree-Bogoliubov theory
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相对论连续介质 Hartree-Bogoliubov 理论中 Ca 同位素中子滴线处的巨大晕
DOI：
10.1103/physrevc.65.041302
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发表时间：
2002-03
期刊：
影响因子：
--
通讯作者：
Zhou SG
中科院分区：
文献类型：
--
作者：
Meng J;Toki H;Zeng JY;Zhang SQ;Zhou SG
用相对论连续介质Hartree-Bogoliubov理论研究了从β稳定线到中子滴线的O、Ca、Ni、Zr、锡、铅同位素的偶偶性质，其中适当地考虑了自旋-轨道相互作用和连续介质。已有的实验结合能E-b和双中子分离能S-2n得到了很好的重现。预测的中子滴线核分别为Ca-74、Ni-100、Zr-140、Sn-176和Pb-268。根据对双中子分离能、单粒子能级、轨道占据、连续体和核子密度分布的贡献、配对、关联和连续体的贡献等方面的分析，提出了A>；60的Ca同位素中可能会出现由配对、关联引起的巨晕现象。
The properties of even-even O, Ca, Ni, Zr, Sn, and Pb isotopes from the beta-stability line to the neutron drip line are studied with the relativistic continuum Hartree-Bogoliubov theory, where both the spin-orbit interaction and continuum are properly taken into account. The available experimental binding energies E-b and two-neutron separation energies S-2n are reproduced very well. The predicted neutron drip-line nuclei are, respectively, Ca-74, Ni-100, Zr-140, Sn-176, and Pb-268. Based on the analysis of two-neutron separation energies, single-particle energy levels, the orbital occupation, the contribution of continuum and nucleon density distribution, giant halo phenomena due to pairing, correlation and the contribution from the continuum are suggested to appear in Ca isotopes with A>60 apart from Zr isotopes predicted earlier.