First Direct Measurement of the ^{17}O(p,γ)^{18}F Reaction Cross-Section at Gamow Energies for Classical Novae

Abstract

Classical novae are important contributors to the abundances of key isotopes, such as the radioactive ^{18}F, whose observation by satellite missions could provide constraints on nucleosynthesis models in novae. The ^{17}O(p,γ)^{18}F reaction plays a critical role in the synthesis of both oxygen and fluorine isotopes but its reaction rate is not well determined because of the lack of experimental data at energies relevant to novae explosions. In this study, the reaction cross section has been measured directly for the first time in a wide energy range Ecm = 200 - 370 keV appropriate to hydrogen burning in classical novae. In addition, the E=183 keV resonance strength, ωγ=1.67\pm0.12 \mueV, has been measured with the highest precision to date. The uncertainty on the ^{17}O(p,γ)^{18}F reaction rate has been reduced by a factor of 4, thus leading to firmer constraints on accurate models of novae nucleosynthesis.

arXiv commentaccepted by Phys. Rev. Lett

References in corpus (11)

• Nucleosynthesis in Classical Novae: ONe vs. CO White Dwarfs
• Charged-Particle Thermonuclear Reaction Rates: II. Tables and Graphs of Reaction Rates and Probability Density Functions
• S-factor of 14N(p,gamma)15O at astrophysical energies
• The Effects of Thermonuclear Reaction Rate Variations on Nova Nucleosynthesis: A Sensitivity Study
• Charged-Particle Thermonuclear Reaction Rates: I. Monte Carlo Method and Statistical Distributions
• Charged-Particle Thermonuclear Reaction Rates: III. Nuclear Physics Input
• LUNA: a Laboratory for Underground Nuclear Astrophysics
• Gamma-ray emission from novae related to positron annihilation: constraints on its observability posed by new experimental nuclear data
• New experimental study of low-energy (p,gamma) resonances in magnesium isotopes
• Preparation and characterisation of isotopically enriched Ta${}_2$O${}_5$ targets for nuclear astrophysics studies
• Hydrogen Burning of 17-O in Classical Novae

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