Investigation of equation of state and in-medium N N cross sections through nuclear stopping

By using an antisymmetrized molecular dynamics model (AMD), the data of kinematically complete events are compared with the experimental INDRA data through nuclear stopping in Xe + Sn collisions at 10 to 100A MeV. The sensitivity of the nuclear stopping is studied through interactions with different equations of state (EOSs) (soft and stiff) and in-medium NN cross sections in different energy domains. Above 25A MeV, both EOSs and different N N cross sections can affect the nuclear stopping, but none of these parameters used in the AMD model can reproduce the experimental data at 20 to 30A MeV. On the other hand, below 25A MeV, nuclear stopping is not sensitive to both of the EOSs and the N N cross sections because of complete nuclear stopping. This indicates that some important mechanisms may be missing in AMD or that the selection of central collision events may be significantly different between the experiments and the simulations at this energy range.