Entrance channel effects in nucleon and. cap alpha. particle preequilibrium decay of /sup 63/Cu* and /sup 64/Zn*
Double differential cross sections for the inclusive production of neutrons, protons, and ..cap alpha.. particles from /sup 59/Co and /sup 60/Ni bombarded with ..cap alpha.. particles of energies E/sub ..cap alpha../ = 28 and 32 MeV, respectively, have been measured for several angles between 15/sup 0/ and 160/sup 0/. Hybrid model calculations for the preequilibrium decay consistently yield initial excitation numbers n/sub 0/ = 5(4) for both neutron and proton emission from ..cap alpha..+/sup 59/Co (..cap alpha..+/sup 60/Ni) if pairing effects are taken into account. The angular distributions of nucleons and ..cap alpha.. particles differ from those of the reactions p+/sup 62/Ni, /sup 63/Cu; they are discussed in the framework of the generalized exciton model that distinguishes between multistep direct and multistep compound contributions.
- Research Organization:
- I. Institut fuer Experimentalphysik, Universitaet Hamburg, D-2000 Hamburg, Federal Republic of Germany
- OSTI ID:
- 5014424
- Journal Information:
- Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 26:1; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
ALPHA REACTIONS
ANGULAR DISTRIBUTION
BARYONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COBALT 59 TARGET
COMPOUND-NUCLEUS REACTIONS
COPPER 63
COPPER ISOTOPES
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MEV RANGE
MEV RANGE 10-100
NICKEL 60 TARGET
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PRECOMPOUND-NUCLEUS EMISSION
STABLE ISOTOPES
TARGETS
ZINC 64
ZINC ISOTOPES