CENTRAL COLLISIONS OF HELIUM AND CARBON NUCLEI WITH SILVER AND BROMINE NUCLEI AT A MOMENTUM OF 4"5 A GeV/c

1. The selection criteria of central nuclear collisions were investigated, and the field of their applicability was given. The impact parameters of two nuclei for selected events are found to be ≲ 3 fm. 2. Events classified as central collision ones are accompanied by the emission of at least one g-particle emitted backward in the laboratory coordinate system. 3. Both the multiplicity of relativistic (s) particles and the number of pions among them are proportional to the mass of projectile nucleus. 4. The sharp increase in s-particle forward collimation with increasing projectile nucleus mass is related to the increase in inelastically scattered protons of this nucleus. 5. The calculations by the cascade-evaporation model for4He(Ag, Br) collisions answer a qualitative character of experimental data behaviour but overestimate the degree of target nucleus desintegration.