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《中国物理C》（英文）编辑部
2024年10月30日
Chinese Physics C> 2004, Vol. 28> Issue(3) : 284-289 

Equation of State of Spin-Polarized Nuclear Matter

  •  Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 INFN-LNS,44 Via S.Sofia,I-95123 Catania,Italy

  • Within the spin-dependent Brueckner-Hartree-Fock framework, the equation of state of the spin-polarized nuclear matter has been investigated by adopting the realistic nucleon-nucleon interaction AV18 supplemented with a microscopic three-body force. The related physical quantities such as the Landau parameters G0 in spin channel and G′0 in spin-isospin channel, have been calculated. The three-body force effects have been studied and stressed with a special attention. It is shown that in the Brueckner-Hartree-Fock framework the predicted energy per particle of spin-polarized nuclear matter versus the neutron and proton spin-polarization parameters fulfills a quadratic law in the whole range of spin-polarization. At the empirical saturation density, the calculated Landau parameter G′0 is 1.22 and 1.28 respectively for the two-cases with and without including the three-body force, both are in agreement with its experimental value. Both the Landau parameters G0 and G′0 are positive in the density region up to ρ=0.5fm－3 and increase monotonically as increasing density so that no any evidence is found for a spontaneous transition to a ferromagnetic state in nuclear matter. The three-body force effect is to strongly increase the Landau parameters G0 and G′0 at high densities, making the nuclear matter at high densities more stable against spin and spin-isospin fluctuations. The obtained Landau parameters G0 and G′0 together with their density dependences may serve as constraints on the spin-spin parts and spin-isospin dependent parts of the phenomenological Skyrme and Skyrme-like interactions.
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ZUO Wei, Lombardo U, SHEN Cai-Wan, LIU Jian-Ye and LI Jun-Qing. Equation of State of Spin-Polarized Nuclear Matter[J]. Chinese Physics C, 2004, 28(3): 284-289.
ZUO Wei, Lombardo U, SHEN Cai-Wan, LIU Jian-Ye and LI Jun-Qing. Equation of State of Spin-Polarized Nuclear Matter[J]. Chinese Physics C, 2004, 28(3): 284-289. shu
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Received: 2003-05-26
Revised: 1900-01-01
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Equation of State of Spin-Polarized Nuclear Matter

    Corresponding author: ZUO Wei,
  • Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 INFN-LNS,44 Via S.Sofia,I-95123 Catania,Italy
  • Received Date: 2003-05-26
  • Accepted Date: 1900-01-01
  • Available Online: 2004-03-05

Abstract: Within the spin-dependent Brueckner-Hartree-Fock framework, the equation of state of the spin-polarized nuclear matter has been investigated by adopting the realistic nucleon-nucleon interaction AV18 supplemented with a microscopic three-body force. The related physical quantities such as the Landau parameters G0 in spin channel and G′0 in spin-isospin channel, have been calculated. The three-body force effects have been studied and stressed with a special attention. It is shown that in the Brueckner-Hartree-Fock framework the predicted energy per particle of spin-polarized nuclear matter versus the neutron and proton spin-polarization parameters fulfills a quadratic law in the whole range of spin-polarization. At the empirical saturation density, the calculated Landau parameter G′0 is 1.22 and 1.28 respectively for the two-cases with and without including the three-body force, both are in agreement with its experimental value. Both the Landau parameters G0 and G′0 are positive in the density region up to ρ=0.5fm－3 and increase monotonically as increasing density so that no any evidence is found for a spontaneous transition to a ferromagnetic state in nuclear matter. The three-body force effect is to strongly increase the Landau parameters G0 and G′0 at high densities, making the nuclear matter at high densities more stable against spin and spin-isospin fluctuations. The obtained Landau parameters G0 and G′0 together with their density dependences may serve as constraints on the spin-spin parts and spin-isospin dependent parts of the phenomenological Skyrme and Skyrme-like interactions.

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