中国物理B ›› 2004, Vol. 13 ›› Issue (11): 1848-1853.doi: 10.1088/1009-1963/13/11/014

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Effect of three-body interaction on hot asymmetric nuclear matter

左维1, 李增花2, 陆广成2   

  1. (1)Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; (2)Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
  • 收稿日期:2004-04-05 修回日期:2004-06-07 出版日期:2004-11-20 发布日期:2005-06-20
  • 基金资助:
    Project supported partly by the Knowledge Innovation Programme of the Chinese Academy of Sciences (Grant No KJCX2-SW-N02), the State Key Development Programme of Basic Research of China (Grant No G2000077400 ), and the Key Preresearch Programme of the Min

Effect of three-body interaction on hot asymmetric nuclear matter

Li Zeng-Hua (李增花)ab, Zuo Wei (左维)a, Lu Guang-Cheng (陆广成)ab   

  1. a Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; b Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
  • Received:2004-04-05 Revised:2004-06-07 Online:2004-11-20 Published:2005-06-20
  • Supported by:
    Project supported partly by the Knowledge Innovation Programme of the Chinese Academy of Sciences (Grant No KJCX2-SW-N02), the State Key Development Programme of Basic Research of China (Grant No G2000077400 ), and the Key Preresearch Programme of the Min

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摘要： The properties of hot asymmetric nuclear matter are studied in the framework of the finite temperature Brueckner－Hartree－Fock theory that is extended to include the contribution of microscopic three-body forces. We give the variation of the critical temperature with the asymmetry parameter and show the effect brought by this three-body repulsive potential on the value of the critical asymmetry of the phase transition for asymmetric nuclear matter. Owing to the additional repulsion provided by three-body forces, this value decreases. In addition, the domain of mechanical instability for hot nuclear matter is also indicated, which gradually shrinks with increasing asymmetry and temperature.

关键词: nuclear matter, three-body force, asymmetry parameter, mechanical instability

Abstract: The properties of hot asymmetric nuclear matter are studied in the framework of the finite temperature Brueckner－Hartree－Fock theory that is extended to include the contribution of microscopic three-body forces. We give the variation of the critical temperature with the asymmetry parameter and show the effect brought by this three-body repulsive potential on the value of the critical asymmetry of the phase transition for asymmetric nuclear matter. Owing to the additional repulsion provided by three-body forces, this value decreases. In addition, the domain of mechanical instability for hot nuclear matter is also indicated, which gradually shrinks with increasing asymmetry and temperature.

Key words: nuclear matter, three-body force, asymmetry parameter, mechanical instability

中图分类号:  (Nuclear matter)

  • 21.65.-f
21.60.Jz (Nuclear Density Functional Theory and extensions (includes Hartree-Fock and random-phase approximations)) 21.30.-x (Nuclear forces) 24.10.Cn (Many-body theory)