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 




Mg and 


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.