Abstract The main experimental characteristics multiplicity have been investigated from
Si with emulsion at 4.5 GeV/c.
The nucleus-nucleus collisions are given in the energy interactions of
Si with emulsion nuclei at nearly the
same. On the other hand the relativistic energy (a few GeV/nucleon) is a special energy, at which the nuclear limiting
fragmentation applies initially. Therefore, the target fragmentation is studied by selecting samples of inelastic interactions
events having no emission of relativistic hadrons'. The multiplicity distribution of the produced target fragments are studied.
The angular distribution of target fragmentations particles, grey and black of the interaction of
Si emulsions, shows
statically significant peak which have been attributed to a collective phenomenon.