We report the experimental measurements of the multiplicity and angular distributions of the target associated particles (grey and black) produced in the interactions of (p, 3He, 4He, 6Li, 12C, 22Ne, and 28Si) with emulsion nuclei at nearly the same incident energy (3.7A GeV). The average values of the emitted grey and black particles increase with increasing target size. They are found to be dependent on the impact parameter of the interaction. The multiplicity and angular distributions reach asymptotic behavior with anisotropy factor (F/B)g,b. This factor seems to be independent of the projectile and target masses as well as the impact parameter. The experimental angular distributions are analyzed in the framework of the modified Maxwell – Boltzman distributions. The results yield quite interesting information regarding the mechanism of target fragments production in the backward hemisphere. The (F/B)g,b ratios are good parameters to calculate the temperature of the systems emitting grey and black particles.
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