论文部分内容阅读
Fig.1 shows influences about the isospin dependence of in-medium N-N cross sectionσ_(NN)~(iso)and MDI on the isoscaling parameterαfor two central collisions ~(60)Ca+~(60)Ca and ~(40)Ca+~(40)Ca in the beam energies E_(lab)’S from 40 to 60 MeV/u.From Fig.1 it is clear that the line-a(U~(MDI)+σ_(NN)~(iso))is obvious lower than the line-b (U~(MDI)+σ_(NN)~(noiso))and line-c(U~(noMDI)+σ_(NN)~(iso))is obvious lower than line-d(U~(noMDI)+σ_(NN)~(noiso))in Fig.1.This means that the isospin dependence of in-medium N-N cross section induces obviously the decrease of isoscaling parame-
Fig. 1 shows influences on the isospin dependence of in-medium NN cross section σ_ (NN) ~ (iso) and MDI on the isoscaling parameter α_for two central collisions ~ (60) Ca + ~ (60) Ca and ~ (40) 40) Ca in the beam energies E_ (lab) ’S from 40 to 60 MeV / u.From Fig.1 it is clear that the line-a (U ~ (MDI) + σ_ (NN) ~ (iso)) is it is obvious lower than line-b (U ~ (MDI) + σ_ (NN) ~ (noiso)) and line_c (U ~ (noMDI) + σ_ (NN) (U ~ (noMDI) + σ_ (NN) ~ (noiso)) in Fig.1. This means that the isospin dependence of in-medium NN cross section induces obviously the decrease of isoscaling parame-