Phys. Rev. C 64, 065804 (2001) [7 pages]Ratio of S factors for (p,γ) reactions on 12C and 13C at astrophysically relevant energiesReceived 19 July 2001; published 21 November 2001 We present measurements of the 12C(p,γ0)13N/13C(p,γ0)14N S factor ratio at Ep=160 keV. The overall result of 0.33±0.03 is in good agreement with the value of this ratio obtained from previous experimental values of the S factors for the 12C(p,γ0)13N and the 13C(p,γ0)14N reactions. A value for the total S factor ratio of S[12C(p,γtotal)]/S[13C(p,γtotal)]=0.24±0.03 is computed by correcting the 13C(p,γ0) S factor for transitions to the other intermediate states. The direct + resonance model calculation of this ratio and the impact on the CNO cycle are also explored. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.64.065804
DOI:
10.1103/PhysRevC.64.065804
PACS:
26.20.+f, 25.40.Lw
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