  The dynamics of heavy-ion reactions at Fermi energies is dominated by a
dissipative mechanism modified by the concurrent emission of non-statistical
nucleons, light particles, and nuclear clusters. Experimental observables are
available to monitor the relaxation processes driving the evolution of an
interacting nuclear system towards equilibrium. Isospin degrees of freedom
provide interesting new access to fundamental information on the reaction
mechanism and the effective in-medium nucleonic interactions.
