Published April 11, 1988
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Coincidence measurement of the 12C(α,γ)16O cross section at low energies
Abstract
The E1 capture cross section for the reaction 12C(α,γ)16O to the 16O ground state has been measured for Ec.m.=1.29–3.00 MeV. A γ-ray–recoil-particle coincidence technique has been used to obtain essentially background-free reaction yields. A three-level R-matrix analysis of the E1 S factor leads to an allowed range for SE1 at 300 keV of 0.00–0.14 MeV b. A model-dependent R-matrix analysis and a hybrid R-matrix analysis result in values of 0.14 and 0.08 MeV b, respectively, for SE1(300).
Additional Information
©1988 The American Physical Society. Received 14 December 1987. We would like to acknowledge helpful discussions with S.E. Koonin, R.D. McKeown, K. Langanke, and W.A. Fowler. We also acknowledge considerable technical support from W. Schick and R. Carr. This work was supported in part by a gift to the California Institute of Technology from the W.K. Keck Foundation and from National Science Foundation Grant No. PHY 85-05682.Files
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