摘要: The study of heavy ion collisions is motivated by the desire to probe properties nuclear matter under unusual. conditions. Depending on energy beam and impact parameter collision, different phenomena are observed. A survey typical experimental data their interpretations presented. For at low energies, reaction dominated irreversible, non-equilibrium processes. Both time-dependent mean-field theory statistical tranport employed for understanding these reactions. At high main part reactions due multiple scatterings between projectile nucleons target nucleons. We discuss both linear cascade model model.