Using the 4 pi multidetector INDRA, collisions between Ar-36 and Ni-58
have been investigated over a broad bombarding energy range, from 32
to 95 AMeV. The onset for complete vaporization of the system into neu
trons, H and He isotopes as well as the evolution with energy of the i
sotopic composition of the vaporization events were determined. Initia
l excitation energy needed for vaporization is discussed.