: Cross sections for the production of target fragments in the reactions of iron with 135 MeV/nucleon 12 C and 80 MeV/nucleon 16 O ions have been measured by off-line γ-ray spectroscopy. Through these data, the mass yield distributions have been obtained. The result of the experiment for the reaction with 135 MeV/nucleon 12 C ions is compared with theoretical calculations using the fusion-fragmentation model and the GEMINI code for sequential binary decay, following a calculation with the fireball model.

Production yields were determined For 25 target fragments produced from the reaction of iron with 80 MeV/u O-16 ions. From these data, charge distribution and mass yield distribution have been deduced. The experimental results are compared with those reported from our previous work. It is found that the width parameter sigma(z) and the most probable charge Z(p) of the charge distribution increase slowly with increasing bombarding energy. The mass yield distribution is discussed in terms of the concepts of limiting fragmentation and factorization.