MASS YIELD DISTRIBUTION OF TARGET RESIDUES FROM THE INTERACTION OF IRON WITH 135-MEV U C-12 IONS/

Production cross sections of target residues have been measured from t he interaction of iron with 135-MeV/u C-12 ions, using nuclear chemist ry techniques. Mass yield distribution was deduced from the measured c ross sections on the basis of a Gaussian charge distribution function, We found that yields at A < 30 mass region in this reaction were much higher than those in the reaction of 46 MeV/u C-12 + Cu, and those pr oducts were partial to neutron-excess, The experimental results were c ompared with calculations based on the statistical fusion fragmentatio n model and the modified sequential binary decay model, respectively. It seems to indicate that multifragmentation is one of the dominated r eaction mechanisms responsible for production of the fragments with ma ss number of A < 30 at this incident energy.