New measurements of the astrophysical S factor for 12C(p,γ)13N reaction at low energies and the asymptotic normalization coefficient (nuclear vertex constant) for the p+12C13N reaction

N. Burtebaev, S. B. Igamov, R. J. Peterson, R. Yarmukhamedov, and D. M. Zazulin
Phys. Rev. C 78, 035802 – Published 11 September 2008

Abstract

New measurements of differential and total cross sections for the 12C(p,γ)13N reaction have been made at beam energies of Ep=354,390,460,463,565,750, and 1061 keV. Analysis of the astrophysical S factor S(E) for the 12C(p,γ)13N reaction at low energies and of the reaction rates has been carried out within the R-matrix approach by using the previously measured nuclear vertex constant (or the respective asymptotic normalization coefficient) for the virtual decay 13Np+12C to fix the direct capture part of the amplitude in S(E). It is demonstrated that the R-matrix approach, using the measured asymptotic normalization coefficient, can be employed as an ideal tool, minimizing the uncertainties associated with a calculation of the direct capture cross section of the 12C(p,γ)13N reaction at extremely low energies. New information on the proton and γ width for the first excited state of N13 is obtained.

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  • Received 23 July 2007

DOI:https://doi.org/10.1103/PhysRevC.78.035802

©2008 American Physical Society

Authors & Affiliations

N. Burtebaev1, S. B. Igamov2, R. J. Peterson3, R. Yarmukhamedov2, and D. M. Zazulin1

  • 1Institute of Nuclear Physics, 050032 Almaty, Kazakhstan
  • 2Institute of Nuclear Physics, 100214 Tashkent, Uzbekistan
  • 3Department of Physics, University of Colorado, Boulder, Colorado 80309-0390, USA

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Issue

Vol. 78, Iss. 3 — September 2008

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