Neutron branching in the reaction 12C + 12C

Details Neutron branching in the reaction 12C + 12C Neutron branching in the reaction 12C + 12C

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977nupha.279...70d&link_type=abstract

Nuclear Physics A, Volume 279, Issue 1, p. 70-84.

Physics

Nuclear Physics

9

Nuclear Reactions

Scientific paper

The cross section for the reaction 12C(12C, n)23Mg has been measured in the energy range Ec.m. = 3.54-4.94 MeV by counting the delayed γ-rays from 23Mg decays (half-life = 11.57 sec), and a theoretical model has been employed to extrapolate the results to threshold (Ec.m = 2.60 MeV). By combining these results with previous measurements of the reactions 12C(12C, p)23Na and 12C(12C, α)20Ne, the neutron branching ratio in the energy interval from threshold to 8 MeV is deduced, and a thermal average is computed that should be valid for use in astrophysical environments characterized by temperatures in the range (0.5-5) × 109 °K. The neutron branching at temperatures appropriate to hydrostatic carbon burning in stars (T ~ 109 °K) is found to be much smaller than previously estimated.
Present address: Board of Studies in Astronomy and Astrophysics, University of California, Santa Cruz, California 95064.

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