Alpha-transfer reactions in light nuclei. III. (/sup 7/Li, t) stripping reaction. [38 MeV, exact finite-range coupled channel Born approximation analysis]

Journal Article · Sun Aug 01 04:00:00 EDT 1976 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.14.491· OSTI ID:7266740

Cobern, M E; Pisano, D J; Parker, P D

The /sup 12/C(/sup 7/Li, t)/sup 16/O and /sup 16/O(/sup 7/Li, t)/sup 20/Ne reactions have been studied at a beam energy of 38 MeV. At this energy these reactions exhibit a high selectivity for populating ..cap alpha..-particle cluster states. The angular distributions for these states have been analyzed using an exact-finite-range coupled-channels Born-approximation code incorporating final-state cluster wave functions derived from an ..cap alpha..-core folded potential. The resulting ..cap alpha..-particle spectroscopic factors (S/sub alpha/) for the 0/sup +/, 2/sup +/, and 4/sup +/ members of the /sup 20/Ne ground state band are in good agreement with cluster model predictions. For the 7.12-MeV (1/sup -/) state in /sup 16/O, the spectroscopic factor (S/sub alpha/ approx. = 0.20) is consistent with other analyses but is uncertain by a factor of 2 due to the presence of significant compound-nuclear contributions to this transition. In general, for those states which are not selectively populated at forward angles the measured angular distributions are well described by a Hauser-Feshbach calculation. In particular it is shown that both the magnitude and shape of the angular distributions for the 11.10-MeV (4/sup +/) state populated in the /sup 12/C(/sup 6/Li, d)/sup 16/O and /sup 12/C(/sup 7/Li, t)/sup 16/O reactions can be well accounted for in terms of statistical compound-nuclear contributions. The elastic scattering of /sup 7/Li ions from several light targets has also been studied and optical-model potentials derived. (AIP)

• Research Organization: Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520
• OSTI ID: 7266740
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 14:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651325* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Nuclear Reactions & Scattering-- (-1987)
651425 -- Nuclear Properties & Reactions
A=20-38
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA-TRANSFER REACTIONS
ANGULAR DISTRIBUTION
BORN APPROXIMATION
CARBON 12 TARGET
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CLUSTER MODEL
COMPOUND-NUCLEUS REACTIONS
DIRECT REACTIONS
DISTRIBUTION
DWBA
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
FOUR-NUCLEON TRANSFER REACTIONS
FUNCTIONS
HAUSER-FESHBACH THEORY
HEAVY ION REACTIONS
ISOTOPES
LIGHT NUCLEI
LITHIUM 7 REACTIONS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
MULTI-NUCLEON TRANSFER REACTIONS
NEON 20
NEON ISOTOPES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEAR THEORY
NUCLEI
OPTICAL MODELS
OXYGEN 16 TARGET
SPECTROSCOPIC FACTORS
STABLE ISOTOPES
STRIPPING
TARGETS
TRANSFER REACTIONS
TRITONS
WAVE FUNCTIONS
WAVE FUNCTIONS ENERGY LEVELS