Excitation energy partition in 74Ge + 165Ho collision at energy 8.5 MeV/A

The distribution of the excitation energy between both fragments in Heavy Ion Collision has been measured recently for the reaction 74Ge + 165Ho at 8.5 MeV/A. One can see from the experimental data a gradual transition from moreless equal partition of the heat for the peripheral collisions (small energy loss) toward equal temperatures in more central collisions (high energy loss). The similar dependence of the heat partition as a function of the energy loss was observed earlier by Vandenbosch et al for the reaction 56Fe + 238U at 8.5 MeV/A and by Benton et al for the 56Fe + 165Ho for a broad range of energy dissipation. Theoretical calculations leading to the excitation energy division between both fragments have been carried out by Randrup and by Feldmeier. In both calculations the same excitation mechanism was assumed which is the exchange of particles between colliding nuclei. Differences between results are mainly due to the different shape parametrization and calculation of the potential energy. Randrup's results are moving much faster towards equal temperatures limit if one goes to more central collisions. Both models however do not predict the direction of the experimental mass flow for the 56Fe + 165Ho system. In the present paper classical dynamical calculations following Feldmeir's approach with some modifications are presented for 74Ge + 165Ho system