LANGEVIN DESCRIPTION OF FUSION, DEEP-INELASTIC COLLISIONS AND HEAVY-ION-INDUCED FISSION

The description of fusion of heavy ions, deep-inelastic heavy-ion coll isions and heavy-ion-induced fission in the framework of Langevin equa tions is reviewed. The Langevin equations are derived within an ideali zed schematic model. These equations are applied with the aim to repro duce the experimental data. In order to be able to do so the potential and the transport coefficients are not taken from the schematic model but from the phenomenological surface friction model in the case of f usion and deep-inelastic collisions. In the case of heavy-ion-induced fission we deal mainly with a model which is a combination of a dynami cal Langevin and a statistical model description. Here again the input is chosen phenomenologically in such a way that a universal reproduct ion of the data for a large multitude of observables is possible. Comp arison with related work of other authors is performed. (C) 1998 Elsev ier Science B.V.