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arXiv 1209.5263nucl-th
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连续统Skyrme-Hartree-Fock-Bogoliubov理论中巨晕核的对关联

Pair correlation of giant halo nuclei in continuum Skyrme-Hartree-Fock-Bogoliubov theory

Y. Zhang, M. Matsuo, J. Meng

摘要:

用自洽连续Skyrme Hartree-Fock-Bogoliubov方法研究了用$A=124-138$预测的富中子Zr同位素中的巨晕,其中用格林函数方法处理了连续准粒子态的渐近行为.通过分析中子对凝聚体(对密度)的渐近指数尾和中子粒子密度的渐近指数尾,详细研究了巨晕中的中子对关联。与这些巨大的晕核的中子准粒子谱进行了检查。结果表明,中子对凝聚体的渐近指数尾主要是由非共振连续准粒子态所控制,对应于具有低渐近动能的散射态.这与中子密度的渐近尾相反,其主要贡献来自对应于Hartree-Fock势中弱束缚单粒子轨道和共振轨道的共振准粒子态。

英文摘要:

The giant halos predicted in neutron-rich Zr isotopes with $A=124-138$ are investigated by using the self-consistent continuum Skyrme Hartree-Fock-Bogoliubov approach, in which the asymptotic behavior of continuum quasiparticle states is properly treated by the Green's function method. We study in detail the neutron pair correlation involved in the giant halo by analyzing the asymptotic exponential tail of the neutron pair condensate (pair density) in addition to that of the neutron particle density. The neutron quasiparticle spectra associated with these giant halo nuclei are examined. It is found that the asymptotic exponential tail of the neutron pair condensate is dominated by non-resonant continuum quasiparticle states corresponding to the scattering states with low asymptotic kinetic energy. This is in contrast to the asymptotic tail of the neutron density, whose main contributions arise from the resonant quasiparticle states corresponding to the weakly-bound single-particle orbits and resonance orbits in the Hartree-Fock potential.

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