Quasi-elastic region of the 56Fe + 56Fe and 56Fe + 238U reactions

Projectile-like fragments (PLF's) were detected for the 15-MeV/uFe + Fe and Fe + U reactions. The mass, charge and energy of the PLF's were recorded. For the Fe + Fe reaction light-charged particles were also recorded in coincidence with PLF's. Products with kinetic energies corresponding to the first 100 MeV of energy loss were studied in detail for a variety of questions that remain concerning the quasi-elastic region. PLF energy spectra clearly show the presence of structures. These structures can be classified as either narrow or broad in kinetic energy width. By use of evaporation calculations, it was shown that broad structures were due to normal evaporation processes. Narrow structures with widths of 8 to 10 MeV could not be duplicated by evaporation calculations and their origin is still unexplained