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以有限温度Brueckner-Hartree-Fock(BHF)方法为基础,利用质量算子的空穴线展开,计算了不同温度和密度下的核物质中单核子势和核子有效质量,特别是研究和讨论了基态关联效应和三体核力贡献对热核物质中单核子势的影响.研究表明,基态关联和三体核力对单核子势的密度和温度依赖性均有重要影响.基态关联导致的重排修正具有排斥性,大大减弱了低动量区域单核子势的吸引性,而且基态关联效应对单核子势的贡献随密度增大而增强,随温度升高而减弱.三体核力对基态关联的影响是导致单核子势中重排项贡献减小.在高密度区域包含基态关联效应和三体核力贡献的单核子势的排斥性在整个动量范围内随温度升高而增强.
Based on the Brueckner-Hartree-Fock (BHF) method with finite temperature, the mononuclear potential and the effective mass of nucleons in nuclear matter under different temperatures and densities are calculated by using hole broadening of mass operator, especially the research and discussion The effects of ground-state and triplet contributions on mononuclear potential in thermonuclear species are studied.The results show that both ground state and trisomy forces have an important influence on the density and temperature dependence of mononuclear potential. The rearrangement correction caused by this method is repellent and greatly reduces the attractiveness of mononuclear potential in low momentum region. The contribution of ground state correlation to mononuclear potential increases with the increase of density and decreases with increasing temperature. The influence of nuclear forces on the ground state correlation is the contribution of the rearrangement term in the mononuclear potential decreases.The exclusion of the mononuclear potential which includes the ground state correlation effect and the contribution of the three body nuclear force in the high density region varies with the temperature Increase and enhance.