Elsevier

Nuclear Physics A

Volume 465, Issue 2, 6 April 1987, Pages 291-316
Nuclear Physics A

The scattering of alpha particles from 12C and the 12C(α, γ)16O stellar reaction rate

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Abstract

The elastic scattering of alpha particles from 12C has been investigated for 35 angles in the range θlab = 22° to 163° and for 51 energies at Eα = 1.0 to 6.6 MeV. The extracted phase shifts for l = 0 to 6 partial waves have been parametrized in terms of the multilevel R-matrix formalism. Information on the deduced parameters of states in 16O is reported. The data reveal reduced α-particle widths for the 6.92 and 7.12 MeV subthreshold states consistent with recent work. The implications for the stellar reaction rate of 12C(α, γ)16O are discussed.

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    Supported in part by the Deutsche Forschungsgemeinschaft (Ro429/15-1).

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