Dependence of the spectra and cross sections for the yield of protons with energy above 0.4 GeV at fixed angles on the atomic weights of the colliding nuclei in nucleus-nucleus interactions

The invariant cross sections of the proton yield are presented as a function of the kinetic energy (T > 0.4 GeV) at fixed angles from 0 to 90-degrees for (p,d,alpha,C) + C and (d,alpha,C) + Ta interactions at 4.2 GeV/c per nucleon. It is shown that in the interactions of light nuclei with carbon and tantalum nuclei, the shape of the proton spectra in the studied energy range for emission angles theta > 30-degrees is independent of the type of projectile nucleus. The shape of the spectra of protons with energy T > 0.4 GeV is independent of the type of target nucleus, starting from theta = 20-degrees. The proton-yield cross sections at fixed angles were studied as functions of the atomic weights of the colliding nuclei (A(P),A(T)). In each angular range, the dependence of dsigma/dOMEGA on A(P) can be represented by the power function A(P)alpha(P) for interactions on both light and heavy targets. The angular dependences of the parameters alpha(P)C and alpha(P)Ta are obtained. For the power dependence of dsigma/dOMEGA on the atomic weight of the target nucleus, A(T)alpha(T), the parameters alpha(T) increase from approximately 0.5 to 1-1.1 as the angle theta increases from 0-degrees to 90-degrees.