Charged-Particle Emission in Reactions of 9- and 11 -MeV Neutrons with ^63,65Cu

Cross sections for the emission of protons, deuterons, and alpha particles from enriched targets of ⁶³Cu and ⁶⁵Cu bombarded with 9- and 11-MeV neutrons were measured. A charged-particle time-of-flight spectrometer capable of detecting particles with energies as low as 1 MeV was used to make these measurements. Cross sections and spectra are compared with statistical and preequilibrium model calculations. Level density parameters of various nuclei resulting from the best simultaneous fit to present and previous 15-MeV data are inferred.