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Nuclear physics research. Progress report, April 1, 1982-March 31, 1983

Technical Report ·
OSTI ID:6556030

The investigation has been directed into a new experimental area in an attempt to understand the mechanism responsible for the low-energy fusion cross section limitations. After studying the fusion cross sections for four entrance channels which lead to the same compound nucleus (in addition to our previously reported studies of the /sup 11/B + /sup 12/C and /sup 10/B + /sup 13/C entrance channels we have added the /sup 7/Li + /sup 16/O and /sup 9/Be + /sup 14/N entrance channels to our study of the /sup 23/Na compound nucleus) and after studying the systematics of other fusion cross sections in this mass region, it became apparent that those systems showing the smallest fusion cross sections involved projectiles which required small breakup energies. We have initiated a program to study the light particle production for the /sup 11/B + /sup 12/C and /sup 10/B + /sup 13/C entrance channels in an attempt to determine the magnitude of the breakup cross section for these systems. Results are reported. While our study is not complete, it strongly suggests that projectile breakup is indeed the mechanism responsible for the limitations observed in the low energy fusion cross sections. Our overall study seems to suggest that this mechanism begins at energies near the Coulomb barrier and steadily increases in magnitude with increasing bombarding energy. (WHK)

Research Organization:
Tennessee Technological Univ., Cookeville (USA). Dept. of Physics
DOE Contract Number:
AS05-80ER10714
OSTI ID:
6556030
Report Number(s):
DOE/ER/10714-2; ON: DE83004569
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
ALKALI METAL ISOTOPES
BERYLLIUM 9 REACTIONS
BORON 10 REACTIONS
BORON 11 REACTIONS
BREAKUP REACTIONS
CARBON 12 TARGET
CARBON 13 TARGET
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
ENERGY DEPENDENCE
FUSION REACTIONS
HEAVY ION REACTIONS
ISOTOPES
LIGHT NUCLEI
LIMITING VALUES
LITHIUM 7 REACTIONS
NITROGEN 14 TARGET
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
OXYGEN 16 TARGET
SODIUM 23
SODIUM ISOTOPES
STABLE ISOTOPES
TARGETS