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首页> 外文期刊>Physics of atomic nuclei >Nuclear Symmetry Energy in Terms of Single-Nucleon Potential and Its Effect on the Proton Fraction of beta-Stable npe mu Matter
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Nuclear Symmetry Energy in Terms of Single-Nucleon Potential and Its Effect on the Proton Fraction of beta-Stable npe mu Matter

机译：单核势的核对称能量及其对β-稳定npe物质质子分数的影响

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摘要

Momentum and density dependence of single-nucleon potential u(tau) (k, rho, beta) is analyzed using a density dependent finite range effective interaction of the Yukawa form. Depending on the choice of the strength parameters of exchange interaction, two different trends of the momentum dependence of nuclear symmetry potential are noticed which lead to two opposite types of neutron and proton effective mass splitting. The 2nd-order and 4th-order symmetry energy of isospin asymmetric nuclear matter are expressed analytically in terms of the single-nucleon potential. Two distinct behavior of the density dependence of 2nd-order and 4th-order symmetry energy are observed depending on neutron and proton effective mass splitting. It is also found that the 4th-order symmetry energy has a significant contribution towards the proton fraction of beta-stable npe mu matter at high densities.
机译：单核势u（tau）（k，rho，beta）的动量和密度依赖性使用Yukawa形式的密度依赖性有限范围有效相互作用进行分析。根据交换相互作用强度参数的选择，注意到核对称势的动量依赖性的两种不同趋势，这导致两种相反类型的中子和质子有效质量分裂。异旋旋不对称核物质的二阶和四阶对称能以单核子势的形式解析表示。根据中子和质子有效质量分裂，观察到两种不同的2阶和4阶对称能量密度依赖性行为。还发现在高密度下，四阶对称能对β-稳定npe质子的质子分数有重要贡献。

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