Astrophysical S-factor of the ${}^{14}\text{N(p,}\gamma {\text{)}}^{15}\text{O}$ reaction at 0.4 -- 1.3\,MeV

Abstract

The ${}^{14}\text{N(p,}\gamma {\text{)}}^{15}\text{O}$ reaction is the slowest reaction of the carbon-nitrogen cycle of hydrogen burning and thus determines its rate. The precise knowledge of its rate is required to correctly model hydrogen burning in asymptotic giant branch stars. In addition, it is a necessary ingredient for a possible solution of the solar abundance problem by using the solar ${}^{13}$N and ${}^{15}$O neutrino fluxes as probes of the carbon and nitrogen abundances in the solar core. After the downward revision of its cross section due to a much lower contribution by one particular transition, capture to the ground state in ${}^{15}$O, the evaluated total uncertainty is still 8\%, in part due to an unsatisfactory knowledge of the excitation function over a wide energy range. The present work reports precise S-factor data at twelve energies between 0.357-1.292~MeV for the strongest transition, capture to the 6.79~MeV excited state in ${}^{15}$O, and at ten energies between 0.479-1.202~MeV for the second strongest transition, capture to the ground state in ${}^{15}$O. An R-matrix fit is performed to estimate the impact of the new data on astrophysical energies. The recently suggested slight enhancement of the 6.79~MeV transition at low energy could not be confirmed. The present extrapolated zero-energy S-factors are $S_{6.79}(0)$~=~1.24$\pm$0.11~keV~barn and $S_{\mathrm{GS}}(0)$~=~0.19$\pm$0.05~keV~barn.

Submitted to Phys. Rev. C

References in corpus (7)

• First measurement of the 14N(p,gamma)15O cross section down to 70 keV
• CN-Cycle Solar Neutrinos and Sun's Primordial Core Metalicity
• Precision study of ground state capture in the 14N(p,gamma)15O reaction
• The 14N(p,gamma)15O reaction studied with a composite germanium detector
• Constraining Big Bang lithium production with recent solar neutrino data
• Strength of the $E_{\text{p}}$=1.842 MeV resonance in the ${}^{40}$Ca(p,$\gamma$)${}^{41}$Sc reaction revisited
• Progress of the Felsenkeller shallow-underground accelerator for nuclear astrophysics

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• Activation cross section measurement of the 14N(p,gamma)15O astrophysical key reaction
• Lifetime measurements of excited states in ${}^{15}$O
• The Felsenkeller shallow-underground laboratory for nuclear astrophysics
• Radiative Capture of proton 14N(p,γ) 15O at Low Energy
• Study of the ${}^{20}$Ne($p,\gamma$)${}^{21}$Na reaction at LUNA
• Investigating the impact of Solar Fusion III reaction rates on helioseismic constraints and solar neutrino fluxes