Astrophysical S factor of 12C(α,γ)16O from the beta-delayed alpha-particle emission of 16N

Details Astrophysical S factor of 12C(α,γ)16O from the beta-delayed alpha-particle emission of 16N Astrophysical S factor of 12C(α,γ)16O from the beta-delayed alpha-particle emission of 16N

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phrvl..70.2066z&link_type=abstract

Physical Review Letters, Volume 70, Issue 14, April 5, 1993, pp.2066-2069

Astronomy and Astrophysics

Astrophysics

51

Alpha Decay, Elastic And Inelastic Scattering, 6<=A<=19, Elementary Particle Processes

Scientific paper

The spectrum of low energy beta-delayed alpha-particle emission of 16N was measured with high sensitivity; e.g., at ELα~=1 MeV, a sensitivity for a beta-decay branching ratio in the range of 10-9 (to 10-10) was achieved. We used previous theoretical work of Ji, Filippone, Humblet, and Koonin to extract from these data the astrophysical p-wave S factor for the 12C (α,γ)16O capture reaction, and find SE1(300)=95+/-6(stat)+/-28(syst) keV b. This result is crucial, for example, for understanding the last stages of a massive star before a supernova.

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