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《中国物理C》(英文)编辑部
2024年10月30日

Properties of Isospin Asymmetric Nuclear Matter and Extended Brueckner-Hartree-Fock Approach (Ⅱ) Equation of State,Symmetry Energy and Three-Body Force Effects

  • Within the isospin dependent Brueckner-Hartree-Fock approach,the equation of state of isospin asymmetric nuclear matter and its isospin dependence have been investigated in the whole isospin range. The present work has been focused on the effects of a microscopic three-body force on the equation of state of asymmetric nuclear matter and nuclear symmetry energy. It is shown that,even with the presence of the three-body force,the empirical parabolic law of the energy per nucleon vs isospin asymmetry is still fulfilled accurately in the whole isospin range (0≤ β ≤1). Around the empirical saturation density ρ0=0.17fm-3,the three-body force effect on the symmetry energy is rather small and the symmetry energy at the saturation density obtained in the presence of the three-body force is 30.71MeV in good agreement with its empirical value 30±4MeV;while at high density,the three-body force provides a strong enhancement of the symmetry energy and makes the symmetry energy increase much more rapid as increasing density. A simple parametrization of the symmetry energy as a function of density is proposed
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ZUO Wei, U.Lombardo, LIU Jian-Ye, LI Zeng-Hua and LI Jun-Qing. Properties of Isospin Asymmetric Nuclear Matter and Extended Brueckner-Hartree-Fock Approach (Ⅱ) Equation of State,Symmetry Energy and Three-Body Force Effects[J]. Chinese Physics C, 2002, 26(12): 1238-1246.
ZUO Wei, U.Lombardo, LIU Jian-Ye, LI Zeng-Hua and LI Jun-Qing. Properties of Isospin Asymmetric Nuclear Matter and Extended Brueckner-Hartree-Fock Approach (Ⅱ) Equation of State,Symmetry Energy and Three-Body Force Effects[J]. Chinese Physics C, 2002, 26(12): 1238-1246. shu
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Properties of Isospin Asymmetric Nuclear Matter and Extended Brueckner-Hartree-Fock Approach (Ⅱ) Equation of State,Symmetry Energy and Three-Body Force Effects

    Corresponding author: ZUO Wei,
  • Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator Lanzhou,Lanzhou 730000,China3 INFN-LNS,44 Via S. Sofia,I-95123 Catania,Italy

Abstract: Within the isospin dependent Brueckner-Hartree-Fock approach,the equation of state of isospin asymmetric nuclear matter and its isospin dependence have been investigated in the whole isospin range. The present work has been focused on the effects of a microscopic three-body force on the equation of state of asymmetric nuclear matter and nuclear symmetry energy. It is shown that,even with the presence of the three-body force,the empirical parabolic law of the energy per nucleon vs isospin asymmetry is still fulfilled accurately in the whole isospin range (0≤ β ≤1). Around the empirical saturation density ρ0=0.17fm-3,the three-body force effect on the symmetry energy is rather small and the symmetry energy at the saturation density obtained in the presence of the three-body force is 30.71MeV in good agreement with its empirical value 30±4MeV;while at high density,the three-body force provides a strong enhancement of the symmetry energy and makes the symmetry energy increase much more rapid as increasing density. A simple parametrization of the symmetry energy as a function of density is proposed

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