Isotope and Velocity Distributions in Projectile Fragmentation Reactions at Fermi Energies

Analyses are presented of isotope and velocity distributions of light fragments obtained in the projectile fragmentation reactions of 18 O at 35 A MeV on 9 Be and 181 Ta targets measured at magnetic COMBAS mass-separator at the U400M Research Facility in JINR. The velocity distributions are parameterized by a direct breakup contribution at beam velocity plus an additional dissipative contribution at lower velocities. The results of these fits are compared with predictions by transport calculations and empirical fragmentation models.