Light charged particle and intermediate mass fragment emission in the reaction 640 MeV {sup 86}Kr+{sup 63}Cu
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States)
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)
- Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
- Department of Physics, Hope College, Holland, Michigan 49423 (United States)
- Department of Physics, University of Richmond, Richmond, Virginia 23173 (United States)
Light charged particles from the reaction 640 MeV {sup 86}Kr+{sup 63}Cu have been measured in singles and in coincidence with intermediate mass fragments, fissionlike fragments, and other light charged particles. Multiplicities for {sup 1}H and {sup 4}He 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 {sup 1}H and {sup 4}He can be associated with the composite nucleus {ital en} {ital route} to scission; they are relatively large and thus suggest a time scale for fission longer than that for evaporation. The multiplicities for {sup 1}H and {sup 4}He 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.
- OSTI ID:
- 142679
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 49; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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