Study of the /sup 7/Li(/sup 3/He,. cap alpha. )/sup 6/Li* reaction
Differential cross sections for formation of the 5.37 MeV (J'' = 2/sup +/, T = 1) level in /sup 6/Li have been measured via the reaction /sup 7/Li(/sup 3/He,..cap alpha..)/sup 6/Li at incident /sup 3/He energies in the range 0.7 to 2.5 MeV and for angles in the range 20/sup 0/ less than or equal to theta (Lab) less than or equal to 160/sup 0/. Data for the g.s., 2.18 and 3.56 MeV excited states of /sup 6/Li were also obtained. The results for the g.s. and the first two excited states are in good agreement with previous measurements and show no clear resonance structure. The excitation function for the 5.37 MeV state, however, exhibits resonance structure at incident /sup 3/He energies of 1.45 and 2.15 MeV corresponding to formation of states in the compound nucleus, /sup 10/B, at 18.8 and 19.3 MeV excitation respectively. The experimental data were compared with the results of DWBA calculations using the computer code DWUCK4. Coincident events between the first emitted alpha particle and the decay alpha's or proton's were detected using a counter telescope in the reaction plane at several appropriately chosen angle pairs at an incident /sup 3/He energy of 2.15 MeV. Branching ratios for the allowed decay modes /sup 5/He + p and ..cap alpha.. + p + n, as well as the isospin forbidden decay into ..cap alpha.. + d, were deduced from the data.
- Research Organization:
- City Univ. of New York, NY (USA)
- OSTI ID:
- 5162786
- Country of Publication:
- United States
- Language:
- English
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Experimental-- Energy Levels & Transitions-- (-1987)
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Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALPHA PARTICLES
BORN APPROXIMATION
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
DIRECT REACTIONS
DWBA
ENERGY LEVELS
ENERGY RANGE
EXPERIMENTAL DATA
HELIUM 3 REACTIONS
INFORMATION
ISOTOPES
LIGHT NUCLEI
LITHIUM 6
LITHIUM 7 TARGET
LITHIUM ISOTOPES
MEV RANGE
MEV RANGE 01-10
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
PICKUP REACTIONS
STABLE ISOTOPES
TARGETS
TRANSFER REACTIONS