ANGULAR-DISTRIBUTION OF SLOW AND RELATIVISTIC CHARGED-PARTICLES PRODUCED IN SILICON-EMULSION AND CARBON-EMULSION INTERACTIONS AT 4.5A-GEV C/

The paper presents the data on Si-28- and C-12-emulsion interactions a t 4.5A GeV/c. Angular distributions of target fragments and relativist ic charged secondaries have been investigated. No shock wave phenomeno n is observed. Forward/backward ratios in each ease are calculated. A detailed study of probability distributions of relativistic charged se condaries produced per unit rapidity as well as rapidity densities and their dependence on projectile and target mass has been carried oat. A comparative study of angular spectra of shower particles produced in central and peripheral collisions gives an evidence in support of lim iting fragmentation hypothesis, It is found that a large number of par ticles are produced in the central region in comparison with the targe t fragmentation region, whereas no indication of particle production i s found in the projectile fragmentation region. Moreover, the centrali ty of the interactions seems to increase with the increasing shower pa rticle multiplicity.