12C(α,γ)16O revisited

Details 12C(α,γ)16O revisited 12C(α,γ)16O revisited

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985nupha.439..384l&link_type=abstract

Nuclear Physics A, Volume 439, Issue 2, p. 384-396.

Physics

Nuclear Physics

39

Scientific paper

A previous analysis of the 12C(α, γ)16O reaction is corrected and improved. The E1 capture is treated in a hybrid R-matrix analysis while a microscopically founded potential model is used to describe the E2 radiation. We calculate capture cross sections to both the 16O ground and 6.92 MeV excited states and show the latter to be astrophysically unimportant. Fits to data from Caltech and Münster show that E2 capture is significant (20-35%) at astrophysical energies and give S-factors at Ec.m. = 300 keV of 0.23 MeV . b and 0.35 MeV . b, respectively. These values are significantly greater than the currently accepted value.

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