{sup 12}C({alpha},{gamma}){sup 16}O cross sections at stellar energies

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.54.1982· OSTI ID:385840

Ouellet, J M; Butler, M N; Evans, H C; Lee, H W; Leslie, J R; MacArthur, J D; McLatchie, W; Mak, H; Skensved, P; Whitton, J L; Zhao, X ^[1]; Alexander, T K ^[2]

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1. Queen`s University, Kingston, Ontario, K7L 3N6 (CANADA)
2. Atomic Energy of Canada Limited, Chalk River, Ontario, K0J 1J0 (CANADA)

The excitation function of the {sup 12}C({alpha},{gamma}){sup 16}O reaction and the angular distribution of its {gamma} rays were measured at nine center-of-mass energies ranging from {ital E}=1.37 to 2.98 MeV. These measurements allowed the separation of the {ital E}1 and {ital E}2 contributions and their extrapolation to the region of astrophysical interest. The analysis of all the available {ital E}1 cross sections with the {ital K}-matrix method and with a three-level {ital R}-matrix method yields a consistent prediction of 79{plus_minus}16 keVb for the {ital E}1 {ital S} factor at 300 keV. The {ital E}2 contribution at the same energy is 36{plus_minus}6 keVb from a cluster model analysis of the present data. The best estimate of the total {ital S} factor at 300 keV is 120 keVb, and it is unlikely that it will fall outside the range of 80{endash}160 keVb. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 385840
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 4 Vol. 54; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ALPHA REACTIONS
ANGULAR DISTRIBUTION
CARBON 12 TARGET
CLUSTER MODEL
EXCITATION FUNCTIONS
K MATRIX
OXYGEN 16
PHOTONS
R MATRIX