Fusion of Li and C and a search for entrance channel limitations to fusion cross sections

Journal Article · Wed Sep 01 04:00:00 EDT 1982 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.26.981· OSTI ID:6712400

Dennis, L C; Abdo, K M; Frawley, A D; Kemper, K W

Excitation functions have been measured for reaction products from the /sup 6/Li and /sup 7/Li induced reactions /sup 6/Li+/sup 12/C, /sup 6/Li+/sup 13/C, /sup 7/Li+/sup 12/C, and /sup 7/Li+/sup 13/C. These data cover the energy range from E/sub lab/ = 9 to 36 MeV. It was found that the maximum fusion cross sections for these reactions are 780 and 770 mb for the /sup 6/Li+/sup 12/C and /sup 6/Li+/sup 13/C, respectively, and 960 and 930 mb for the /sup 7/Li+/sup 12/C and /sup 7/Li+/sup 13/C, respectively. The relative uncertainties for these maximum fusion cross sections are about 5%. Comparisons between optical model calculations of the total reaction cross sections and the measured fusion cross sections indicate that the total fusion cross sections are substantially smaller than the total reaction cross sections for all four reactions at all energies. For each of the four entrance channels, energy and angular distributions have been measured at four energies for individual mass groups between A = 9 and 19 u. Most of these products appear to be evaporation residues. The critical angular momenta deduced from the experimental fusion cross sections are discussed in terms of entrance channel and compound nucleus limitation models for compound nucleus formation. The individual mass groups are discussed in terms of systematics for evaporation residues.

• Research Organization: Department of Physics, Florida State University, Tallahassee, Florida 32306
• OSTI ID: 6712400
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 26:3; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651325* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
CARBON 12 TARGET
CARBON 13 TARGET
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
DATA
DISTRIBUTION
ENERGY RANGE
EVAPORATION MODEL
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
FUNCTIONS
FUSION REACTIONS
HEAVY ION REACTIONS
INFORMATION
LIMITING VALUES
LITHIUM 6 REACTIONS
LITHIUM 7 REACTIONS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR MODELS
NUCLEAR REACTIONS
NUMERICAL DATA
OPTICAL MODELS
TARGETS
TOTAL CROSS SECTIONS