D(18F,pa)15N reaction applied to nova gamma-ray emission

Abstract

The 18F(p,alpha)15O reaction is recognized to be one of the most important reactions for nova gamma-ray astronomy as it governs the early E <= 511keV gamma emission. However in the nova temperature regime, its rate remains largely uncertain due to unknown low-energy resonance strengths. We report here the measurement of the D(18F,p)19F(alpha)15N one-nucleon transfer reaction, induced by a 14 MeV 18F radioactive beam impinging on a CD2 target; outgoing protons and 15N (or alpha-particles) were detected in coincidence in two silicon strip detectors. A DWBA analysis of the data resulted in new limits to the contribution of low-energy resonances to the rate of the 18F(p,alpha)15O reaction.

Rapid Communication to appear in Phys. Rev. C., 4 pages and 4 figures

References in corpus (2)

• Gamma--ray emission from individual classical novae
• Gamma-ray emission from novae related to positron annihilation: constraints on its observability posed by new experimental nuclear data

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• Coupling and higher-order effects in the 12C(d,p)13C and 13C(p,d)12C reactions
• Description of the 17F(p,gamma)18Ne radiative capture reaction in the continuum shell model
• The 18F(p,a)15O reaction rate for application to nova gamma-ray emission
• Recent results in nuclear astrophysics
• Indirect study of 19Ne states near the 18F+p threshold
• Trojan Horse method and radioactive ion beams: study of ${}^{18}$F(p,$\alpha$)${}^{15}$O reaction at astrophysical energies