The $^{18}F(p,\alpha)^{15}O$ reaction rate for application to nova $\gamma$-ray emission

Contribution to the Eighth International Symposium on Nuclei in the Cosmos, Vancouver july 19-23. 4 pages and 2 figuresThe $^18F(p,\alpha)^{15}O$ reaction is recognized as one of the most important reaction for nova gamma-ray astronomy as it governs the early $\leq$ 511 keV emission. However, its rate remains largely uncertain at nova temperatures due to unknown low-energy resonance strengths. We report here on our last results concerning the study of the $D($^{18}F,p\alpha))^{15}N$ reaction, as well as on the determination ofthe $^18F(p,\alpha)^{15}O$ reaction rate using the R-matrix theory. Remaining uncertainties are discussed