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

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

2009-09-25

arxiv.org/abs/0909.4716v1

Publications of the Astronomical Society of Australia, 2009, 26, 237-242

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

6 pages, 4 figures, 1 table. Torino workshop 2008

Scientific paper

10.1071/AS08045

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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