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Entrance channel effect for complete fusion of O + C isotopes

Journal Article · · Phys. Rev. C; (United States)
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The cross section for total fusion of the reaction /sup 18/O+/sup 12/C was studied over a large range of energies from near the Coulomb barrier B/sub C/ to approx.6B/sub C/. Good agreement was found between the critical angular momenta deduced from the experimental results and the predictions of different models. The reaction /sup 17/O+/sup 13/C, leading to the same compound nucleus /sup 30/Si, was studied in the second fusion region (above approx.2B/sub C/). By comparing the relative cross sections for fusion-evaporation to each isotope it is shown that for different entrance channels, even at the highest energies studied, the reactions appear to pass by the formation of a compound nucleus. The critical angular momenta were found to be systematically different from /sup 18/O+/sup 12/C. This difference, which may be due partially to the entrance channel spin, is interpreted as arising from the effect of direct reactions diverting flux from the compound nuclear processes.

Research Organization:
Centre de Recherches Nucleaires et Universite Louis Pasteur, 67037 Strasbourg Cedex, France
OSTI ID:
7060734
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 26:2; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651325* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CARBON 12 TARGET
CARBON 13 TARGET
CARBON 14 TARGET
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
ENERGY RANGE
EVAPORATION MODEL
FUSION REACTIONS
HEAVY ION REACTIONS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
NUCLEAR MODELS
NUCLEAR REACTIONS
OXYGEN 16 REACTIONS
OXYGEN 17 REACTIONS
OXYGEN 18 REACTIONS
STATISTICAL MODELS
TARGETS
TIME-OF-FLIGHT METHOD
TOTAL CROSS SECTIONS