Properties of Spin Polarized Isospin Symmetric Nuclear Matter and Neutron Matter

LI Zeng-Hua; ZUO Wei; LIU Jian-Ye; GUO Wen-Jun

Chinese Physics C> 2003, Vol. 27> Issue(4) : 332-336

Properties of Spin Polarized Isospin Symmetric Nuclear Matter and Neutron Matter

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

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Abstract：
The properties of the spin polarized isospin symmetric nuclear matter and neutron matter as well as their equations of state are investigated by employing the Skyrme effective interaction with four sets of parameters SKM*, SⅢ, SLy230a and SLy230b. Whichever Skyrme parameter is used, the ferromagnetic phase transitions are predicted in both the isospin symmetric nuclear matter and neutron matter. Above the critical density, the polarized matter becomes more stable than the unpolarized one. Consequently such a phase transition is one of the possible explanations of the strong magnetic field in neutron stars. In addition the magnetic susceptibility χ is also evaluated and the ratio χ/χ_F is obtained as a function of the density. The existence of an infinite discontinuity confirms the occurrence of a ferromagnetic phase transition once more.

References

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LI Zeng-Hua, ZUO Wei, LIU Jian-Ye and GUO Wen-Jun. Properties of Spin Polarized Isospin Symmetric Nuclear Matter and Neutron Matter[J]. Chinese Physics C, 2003, 27(4): 332-336.

LI Zeng-Hua, ZUO Wei, LIU Jian-Ye and GUO Wen-Jun. Properties of Spin Polarized Isospin Symmetric Nuclear Matter and Neutron Matter[J]. Chinese Physics C, 2003, 27(4): 332-336. shu

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Received: 2002-04-23
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Properties of Spin Polarized Isospin Symmetric Nuclear Matter and Neutron Matter

Corresponding author: LI Zeng-Hua,

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

Received Date: 2002-04-23

Accepted Date: 1900-01-01

Available Online: 2003-04-05

Abstract: The properties of the spin polarized isospin symmetric nuclear matter and neutron matter as well as their equations of state are investigated by employing the Skyrme effective interaction with four sets of parameters SKM*, SⅢ, SLy230a and SLy230b. Whichever Skyrme parameter is used, the ferromagnetic phase transitions are predicted in both the isospin symmetric nuclear matter and neutron matter. Above the critical density, the polarized matter becomes more stable than the unpolarized one. Consequently such a phase transition is one of the possible explanations of the strong magnetic field in neutron stars. In addition the magnetic susceptibility χ is also evaluated and the ratio χ/χ_F is obtained as a function of the density. The existence of an infinite discontinuity confirms the occurrence of a ferromagnetic phase transition once more.

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Properties of Spin Polarized Isospin Symmetric Nuclear Matter and Neutron Matter

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