Fission following complete fusion for {sup 16}O + {sup 232}Th at 140 MeV
- Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
Previously published results of coincidence measurements between incomplete fusion products and fission fragments from the reaction of 140 MeV {sup 16}O with {sup 232}Th have been used to determine the incomplete fusion contributions to the inclusive fission fragment angular distribution. The incomplete fusion contributions have been subtracted from the inclusive angular distribution, leaving the part due to complete fusion. Because the incomplete fusion processes account for 42% of the fission cross section, the maximum angular momentum contributing to complete fusion is reduced to approximately 55{h_bar}. The angular distribution for fission following complete fusion has been compared with calculations made with the saddle point transition state model and with Bond`s scission point model. When proper account is taken of the large reduction in nuclear temperature at the saddle point due to pre-fission neutron evaporation, the saddle point transition state model reproduces the data very well. Proper handling of the incomplete fusion contributions is found to greatly improve the agreement of Bond`s scission point model with the data for this reaction.
- OSTI ID:
- 249497
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 52; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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