($0.5 \; w \& w$) results in a striking difference as compared to the full wall-and-window friction ($w \& w$). A larger friction causes a decrease of the kinetic energy of the system which is therefore more sensitive to the [*fine structure*]{} of the landscape and consequently is more easily trapped in the deepest valleys. A smaller friction, on the contrary, allows the system, with larger kinetic energy, to move more freely through the landscape, to overcome more easily eventual barriers, resulting in a broader distribution. Reducing friction by a constant factor is obviously an extremely crude approximation to a real temperature dependent viscosity. We use this picture here simply to investigate the influence of friction on fragment distributions and light-particle multiplicities.

The procedure used in order to simulate in an approximate way the vanishing of quantal effects with temperature (see section 4.1.2) is still nowadays subject of controversies, in particular what pairing is concerned [@I78] - [@EgRo00]. Our investigations dealing with this point (for details see ref  [@CS02]) showed that the T-dependence of shell and pairing corrections cannot be neglected, even if our system is already in the beginning of its decay at quite low excitation energy, which can 