The thermonuclear rate for the 19F(a,p)22Ne reaction at stellar temperatures

Abstract

The ${}^{19}$F($\alpha$,p)${}^{22}$Ne reaction is considered to be one of the main sources of fluorine depletion in AGB and Wolf-Rayet stars. The reaction rate still retains large uncertainties due to the lack of experimental studies available. In this work the yields for both exit channels to the ground state and first excited state of ${}^{22}$Ne have been measured and several previously unobserved resonances have been found in the energy range E${}_{lab}$=792-1993 keV. The level parameters have been determined through a detailed R-matrix analysis of the reaction data and a new reaction rate is provided on the basis of the available experimental information.

arXiv commentAccepted for publication in Phys Rev. C

References in corpus (5)

• Nuclear Level Density and the Determination of Thermonuclear Rates for Astrophysics
• Reaction Rates Uncertainties and the Production of F19 in AGB Stars
• On the origin of fluorine in the Milky Way
• The thermonuclear production of F19 by Wolf-Rayet stars revisited
• The effect of the 19F(alpha,p)22Ne reaction rate uncertainty on the yield of fluorine from Wolf-Rayet Stars

Cited by in corpus (8)

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• Evolution of Fluorine Abundances with the ν-Process
• Effects of nuclear cross sections on ${}^{19}$F nucleosynthesis at low metallicities
• Fluorine in carbon-enhanced metal-poor stars: a binary scenario
• Cross sections of $\alpha$-induced reactions for targets with masses $A\approx 20-50$ at low energies
• Fluorine Abundances in the Milky Way Bulge
• Aluminium-26 from massive binary stars II. Rotating single stars up to core-collapse and their impact on the early Solar System
• A proposed direct measurement of cross section at Gamow window for key reaction ${}^{19}$F($p$,$\alpha$)${}^{16}$O in Asymptotic Giant Branch stars with a planned accelerator in CJPL