Abstract
The results of our systematic studies of projectile fragments (PFs) multiplicity distributions in interactions of He-4, C-12, O-16, Ne-22 and Si-28 with emulsion at 4.1-4.5 A GeV/c are presented in this paper. The mean values for the three different multiplicities of PFs at nearly the same energy are given. The dependence of these mean values on the projectile mass number A(p), as well as the dependence of the PFs on target groups (H, CNO and AgBr), has been investigated.