Dirac-Brueckner-Hartree-Fock calculations for isospin asymmetric nuclear matter based on improved approximation schemes
Dirac-Brueckner-Hartree-Fock calculations for isospin asymmetric nuclear matter based on improved approximation schemes
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DOI：
10.1140/epja/i2006-10165-x
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发表时间：
2006-12
期刊：
影响因子：
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通讯作者：
E. N. V. Dalen;C. Fuchs;A. Faessler
中科院分区：
文献类型：
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作者：
E. N. V. Dalen;C. Fuchs;A. Faessler
本文提出了基于改进近似的Dirac-Brueckner-Hartree-Fock方法计算同位旋非对称核物质。势矩阵元素已被改编为同位旋不对称的核物质，以占质子-中子质量分裂在一个更一致的方式。质子性质对这种适应及其后果特别敏感，而中子性质在富含中子的物质中几乎不受影响。虽然目前完整的Brueckner计算仍然过于复杂，适用于有限核，这些相对论Brueckner结果可以作为一个指导，以建立一个密度相关的相对论平均场理论，它可以适用于有限核。结果发现，一个准确的再现Dirac-Brueckner-Hartree-Fock状态方程需要这些耦合函数的重整化。
We present Dirac-Brueckner-Hartree-Fock calculations for isospin asymmetric nuclear matter which are based on improved approximations schemes. The potential matrix elements have been adapted for isospin asymmetric nuclear matter in order to account for the proton-neutron mass splitting in a more consistent way. The proton properties are particularly sensitive to this adaption and its consequences, whereas the neutron properties remains almost unaffected in neutron-rich matter. Although at present full Brueckner calculations are still too complex to apply to finite nuclei, these relativistic Brueckner results can be used as a guidance to construct a density-dependent relativistic mean-field theory, which can be applied to finite nuclei. It is found that an accurate reproduction of the Dirac-Brueckner-Hartree-Fock equation of state requires a renormalization of these coupling functions.