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本文利用Dirac-Brueckner-Hartree-Fock方法,对不同散射道的核子在核物质中的相互作用进行了细致分析,重点分析了不变振幅的不同投影选择对核物质中核子自能和核子碰撞截面的影响.计算结果显示:1)在确定的核子动量下,自旋三重态所对应的自能总是大于自旋单态的自能;同位旋三重态所对应的自能大于同位旋单态的自能值.2)在完全赝矢(CPV)选择下,不同散射道的核子自能对于动量的依赖均明显弱于在赝标(PS)选择下的相应值,而这种差别主要来自于总角动量J较小的分波态.3)在核子相对动量较小时,两种不同选择所对应的核子微分截面较大.4)在确定的入射能量下,质心系中散射角较小时,不同选择下的微分截面差别较为明显.5)在低入射能区,CPV选择下所对应的微分截面大于PS下的微分截面值.6)在CPV选择下的总截面总是大于PS选择下的总截面值.这些差别均随着随入射能量的增大而消失.
In this paper, we use the Dirac-Brueckner-Hartree-Fock method to analyze the nuclear interactions of different scattering paths in nuclear material, and analyze the influence of different projections of invariant amplitude on the nuclear self-energizing and nuclear collision cross sections The calculated results show that: 1) At a given nuclear momentum, the self-energy corresponding to the spin triplet state is always larger than that of the spin-state singlet; the isospin corresponding to the isospin triplet state is larger than the isospin .2) Under full pseudotargeting (CPV) selection, the dependence of nuclear self-energy of different scattering paths on momentum is significantly weaker than that under pseudospectroscopic (PS) selection, and the difference mainly comes from The smaller the total angular momentum J sub-wave state.3) When the relative momentum of the nucleus is small, the two different choices corresponding to the larger the nuclear differential cross-section.4) at a certain incident energy, the center of mass system when the scattering angle is small , The differential cross section difference under different choices is more obvious.5) In the low incident energy region, the differential cross section under CPV selection is larger than the differential cross section under PS.6) The total cross section under CPV selection is always greater than that under PS selection Of the total cross-sectional value of these differences are with the incident energy Increases disappear.