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Detailed investigation of exchange effects in /sup 3/He+. cap alpha. and. cap alpha. +/sup 16/O scattering

Journal Article · · Phys. Rev. C; (United States)
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The effects of intercluster antisymmetrization in /sup 3/He+..cap alpha.. and ..cap alpha..+/sup 16/O systems are examined. The result indicates that the characteristic quantities of the Born-equivalent local potentials can be reliably employed to predict the relative importance of the various nucleon-exchange terms. Based on these quantities and by studying the cross section or phase-shift behavior, it is noted that many exchange terms are of only minor significance when the energy is high or when the absorption is strong. Furthermore, one finds that, at an energy higher than about 25 MeV/nucleon, the features of the cross-section angular-distribution curve, which has a distinct V shape, can be simply explained. Here our investigation shows that the contribution to the cross section in the decreasing part of the V-shaped curve comes essentially from the direct term and the one-exchange terms (mainly the knockon exchange term), while the contribution to the cross section in the increasing part of this curve comes essentially from the core-exchange terms.
Research Organization:
School of Physics, University of Minnesota, Minneapolis, Minnesota 55455
OSTI ID:
6790610
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 26:5; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651215* -- Nuclear Properties & Reactions
A=1-5
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
651315 -- Nuclear Properties & Reactions
A=6-19
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ANGULAR DISTRIBUTION
CHARGED-PARTICLE REACTIONS
CLUSTER MODEL
CROSS SECTIONS
DISTRIBUTION
EXCHANGE INTERACTIONS
HELIUM 3 TARGET
INTERACTIONS
MATHEMATICAL MODELS
NUCLEAR MODELS
NUCLEAR REACTIONS
OXYGEN 16 TARGET
PHASE SHIFT
RESONATING-GROUP METHOD
TARGETS
VARIATIONAL METHODS