IN-MEDIUM NUCLEON-NUCLEON CROSS-SECTION

Within the framework of Brueckner-Hartree-Fock method, the in-medium n ucleon-nucleon (NN) cross section is calculated. We base our investiga tion on a separable Paris potential for the NN interaction and a conti nuous choice for the single particle spectrum. It is found that the in -medium cross section is strongly modified by medium effect. In partic ular, with increasing of nuclear density, the cross sections decrease. This indicates a proper treatment of the density dependence of the in -medium NN cross sections is important.