Precompound evaporation analyses of excitation functions for (. cap alpha. ,xn) reactions
Calculated (..cap alpha..,xn) excitation functions (x = 1 to 4) for /sup 233,234,235/U and /sup 237/Np targets, for incident /sup 4/He energies to 45 MeV, have been compared with experimental results. Calculations used experimental fission barriers with single particle ratios which were deduced by fitting experimentally deduced fission probabilities at excitations up to 12 MeV. Standard precompound parameters used for fitting spectra of nucleon-induced reactions were used, changing only the initial exciton number to four, appropriate for ..cap alpha..-induced reactions. Agreement with experimental results was good to excellent, without the need of multiple precompound decay, nor of variation of precompound decay parameters from those required for nonfissile systems.
- Research Organization:
- University of California, Lawrence Livermore National Laboratory, Livermore, California 94550
- OSTI ID:
- 6758483
- Journal Information:
- Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 29:5; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
BARYON-BARYON INTERACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
EMISSION
ENERGY RANGE
EVAPORATION MODEL
EXCITATION FUNCTIONS
FISSION
FUNCTIONS
HADRON-HADRON INTERACTIONS
INTERACTIONS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NEPTUNIUM 237 TARGET
NEUTRON EMISSION
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PRECOMPOUND-NUCLEUS EMISSION
PROBABILITY
SINGLE-PARTICLE MODEL
TARGETS
URANIUM 233 TARGET
URANIUM 234 TARGET
URANIUM 235 TARGET