Nuclear fragmentation degree in the production of light projectile fragments

Abstract

The projectile-target multiplicity correlations at the lowest (3.7 A GeV) and highest (200 A GeV) available energies in Sulfur-emulsion interactions are investigated in the framework of the participant-spectator model. We examined the light projectile spectator (singly, Nz=1 and doubly, Nz=2 charged projectile fragments). The measured average multiplicities of Nz=1 and Nz=2 at both incident energies showed a decrease with increasing the fragment charge, as well as the average values within experimental errors showed independence on the incident energy. The multiplicity measurements of different emitted secondary charged particles (produced particles, shower tracks, and target fragments, gray and black tracks) in the interactions of 32S-Em at 3.7 A and 200 A GeV were carried out. However, the correlation between the mean multiplicities of secondary charged particles and both of the singly and doubly charged projectile fragments were investigated to shed some light on the interface of spectator and participant regions, and on the possible influences of the phenomena from the two regions on the collision dynamics.