Distributions over the number of interacting nucleons in the relativistic nuclei collisions

The ralativistic nuclei interaction is considered on the base of multiple scattering model. The elastic scattering amplitude and cross sections of noncoherent processes are calculated in exponential approximation. Without taking into account any collective effects, the model allows to describe satisfactorily not only the integral cross-sections of nucleus-nuclei interactions but also the destributions over the number of interacting nucleons. The problem on the possibility of using relativistic nuclei for studying the composition of the surface (diffusive) layer of the nucleus-target is investigated as well. As compared with the optecal approximation the exponential one allows taking into account additional rescatterang of projectile nucleons in the target. The distribution over the number of projectile nucleons and protons is obtained. The results are in good agreement with the experimental data