Abstract
I first give a short historical background of heavy ion research. Nucleus-Nucleus reactions at intermediate, relativistic and ultrarelativistic energies are then discussed and target and projectile fragmentation processes are described. A short summary of existing semiempirical total and partial cross section formulas is given. These formulas are compared with these developed by Sihver et al. The agreement between the calculated cross sections by Sihver et al. and the experimental data is much better than all earlier published results.
