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Classical novae are important contributors to the abundances of key isotopes,such as the radioactive ^{18}F, whose observation by satellite missions couldprovide constraints on nucleosynthesis models in novae. The^{17}O(p,\gamma)^{18}F reaction plays a critical role in the synthesis of bothoxygen and fluorine isotopes but its reaction rate is not well determinedbecause of the lack of experimental data at energies relevant to novaeexplosions. In this study, the reaction cross section has been measureddirectly for the first time in a wide energy range Ecm = 200 - 370 keVappropriate to hydrogen burning in classical novae. In addition, the E=183 keVresonance strength, \omega \gamma=1.67\pm0.12 \mueV, has been measured with thehighest precision to date. The uncertainty on the ^{17}O(p,\gamma)^{18}Freaction rate has been reduced by a factor of 4, thus leading to firmerconstraints on accurate models of novae nucleosynthesis.

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