Abstract
Light charged particles from the reaction 640 MeV Cu have been measured in singles and in coincidence with intermediate mass fragments, fissionlike fragments, and other light charged particles. Multiplicities for and in association with the evaporation residues, fragments, and intermediate mass fragments have been determined. Composite nuclei, most of which decay to evaporation residues, are the major sources of evaporative light-charged particle emission. Average multiplicities for prescission and can be associated with the composite nucleus en route to scission; they are relatively large and thus suggest a time scale for fission longer than that for evaporation. The multiplicities for and in association with the intermediate mass fragments indicate that these fragments are usually born with a significant quantity of excitation energy. These multiplicities are used to estimate the primary masses and kinetic energies of the intermediate mass fragments.
- Received 28 April 1993
DOI:https://doi.org/10.1103/PhysRevC.49.1576
©1994 American Physical Society