International Conference on Heavy Ion Nuclear Collisions in the Fermi Energy Domain
J. Phys. Colloques 47 (1986) C4-63-C4-75
DOI: 10.1051/jphyscol:1986406
TREATMENT OF HEAVY ION COLLISIONS AT INTERMEDIATE ENERGIES
J. AICHELINInstitut für Theoretische Physik der Universität Heidelberg and Max-Planck-Institut für Kernphysik, D-6900 Heidelberg, F.R.G.
Abstract
Microscopic calculations of intermediate energy heavy ion collision are performed employing the Boltzmann Uehling Uhlenbeck (BUU) formalism. We see that at beam energies around the Fermi energy the system does not equilibrize although the spectra show an exponential form. Preequilibrium particles are preferably emitted to the opposite site of the impact parameter as suggested by the Fermi jet model. We discuss furthermore the linear momentum transfer, the nuclear mean free path and the formation of a third cluster at midrapidity which reflects nicely the importance of both - two body collisions and mean field - at these beam energies.