Abstract
Within the experimental errors the interaction mean free paths of He-fragments produced by the collisions of 12 C , 22 Ne and 28 Si nuclei at 4.5 A GeV/c in nuclear emulsion have been found to be independent of the He-multiplicity and the distance from the interaction point. Evidence for the multiplicity scaling of He-fragments is reported. The pseudo-rapidities for the shower particles accompanying the emission of the different multiplicities of the projectile He-fragments are also investigated. Each of these distributions is found to be satisfactorily fitted by a single Gaussian distribution. The temperature of the system emitting the shower particles T is also calculated and found to be independent of both the projectile and the multiplicities of the He-fragment.
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