New High-Precision Measurement of the Reaction Rate of the 18O(p,alpha)15N Reaction via THM

M. La Cognata , C. Spitaleri , A. M. Mukhamedzhanov , B. Irgaziev , R. E. Tribble , A. Banu , S. Cherubini , A. Coc

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V. Crucilla V. Z. Goldberg M. Gulino G. G. Kiss L. Lamia L. Chengbo J. Mrazek R. G. Pizzone S. M. R. Puglia G. G. Rapisarda S. Romano M. L. Sergi G. Tabacaru L. Trache W. Trzaska A. Tumino

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classification 🌌 astro-ph.SR

keywords beenreactionalphacontributionrateaccuracyallowedapproach

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The 18O(p,alpha)15N reaction rate has been extracted by means of the Trojan-Horse method. For the first time the contribution of the 20-keV peak has been directly evaluated, giving a value about 35% larger than previously estimated. The present approach has allowed to improve the accuracy of a factor 8.5, as it is based on the measured strength instead of educated guesses or spectroscopic measurements. The contribution of the 90-keV resonance has been determined as well, which turned out to be of negligible importance to astrophysics.

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New High-Precision Measurement of the Reaction Rate of the 18O(p,alpha)15N Reaction via THM

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