Resonant characteristics of statistical fluctuations in [sup 12]C+[sup 12]C reaction cross sections

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.329· OSTI ID:6898627

Gay, D L ^[1]; Dennis, L C ^[2]

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1. Department of Natural Sciences, University of North Florida, Jacksonville, Florida 32216 (United States)
2. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)

The effects of angular momentum conservation on the properties of Ericson fluctuations in cross sections for the [sup 12]C([sup 12]C,[sup 8]Be[sub 0])[sup 16]O(g.s.) reaction and [sup 12]C([sup 12]C,[alpha])[sup 20]Ne[sup *] reactions leading to the 12 lowest excitations in [sup 20]Ne are studied. Comparison of Hauser-Feshbach predictions to experimental measurements of the [sup 8]Be[sub 0] total cross section in the range 9[le][ital E][sub c.m.][le]20 MeV indicates that this reaction channel is populated primarily by a compound-nucleus mechanism. Similar results are obtained for the majority of the [alpha]-particle channels in the energy region from [ital E][sub c.m.]=6.5 to 12.6 MeV. The compound-nucleus cross sections for these reactions are dominated by a narrow range of angular momenta. A statistical model that includes predicted unequal contributions from compound-nucleus levels with different spins is used to synthesize angular distributions and excitation functions for comparison to data. The results of these simulations give overall quantitatively correct estimates of the size and frequency of the fluctuations observed in the measured total cross sections and of the spins that dominate the fluctuations. Consequences for the identification of resonances'' are discussed.

• OSTI ID: 6898627
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 47:1; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ALPHA DECAY RADIOISOTOPES
ALPHA PARTICLES
ANGULAR DISTRIBUTION
BERYLLIUM 8
BERYLLIUM ISOTOPES
CARBON 12 REACTIONS
CARBON 12 TARGET
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
DATA
DIRECT REACTIONS
DISTRIBUTION
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
HEAVY ION REACTIONS
INFORMATION
ISOTOPES
LIGHT NUCLEI
MEV RANGE
MEV RANGE 10-100
NEON 20
NEON ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
OXYGEN 16
OXYGEN ISOTOPES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
TARGETS
TRANSFER REACTIONS