| Abstract: | A friction force is derived from the two-body collisions of projectile nucleons with target nucleons in the overlap region of their densities. We treat the diffuse surfaces of the heavy ions as Fermi gases. A certain average of the resulting friction force turns put to be identical in structure with the phenomenological Tsang-Swiatecki linear force. In our approach, the strength coefficient of the latter force can be calculated from the free two-nucleon scattering cross section without adjustable parameters. We obtain a strength which agrees well with the value found by Siwek-Wilczyńska and Wilczyński from an empirical fit. |
