Abstract
The relativistic α-particles distributions and correlations of the projectile fragments resulting from the peripheral interactions of (4.5 A GeV/c) 12C, O, 28 Si, and (4.1 A GeV/c) 22Ne projectiles with emulsion have been analyzed and modeled. The distributions of α-particles, the associated-mesons, and the range of the transverse momentum have been obtained. It has been found that, the α-particles distributions obey the logarithmic function, while the associated- mesons distributions obey Gauss function, and the distributions of the range of the α-particles transverse moment shows decaying functions. The correlations between the α-particles numbers and the (min, max) transverse momentum PT of α-particles are also calculated. From this study we could predict that, the dissociation into α-particles is preferably a cascade process; especially; for heavy projectiles.