Study on in-medium nucleon–nucleon cross sections with proton-induced reaction cross sections data

Abstract

Five sets of isospin-dependent in-medium nucleon–nucleon cross sections obtained by means of many-body theories with different approaches or calculation details are tested by comparing the calculated reaction cross sections of proton-induced reactions on various targets with the experimental data. The calculations are performed by using the improved quantum molecular dynamics model. The comparison indicates that these theoretically predicted isospin-dependent in-medium nucleon–nucleon cross sections can reasonably describe the medium suppression effect on the nucleon–nucleon cross sections when the medium densities are at the range of ρ < 0.5ρ0. But it seems that the medium suppression effect in-medium density range of 0.5ρ0 < ρ < ρ0 provided by these in-medium nucleon–nucleon cross sections is too weak to reproduce the experimental data.