The O-18(p, alpha)N-15 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.
New High-Precision Measurement of the Reaction Rate of the O-18(p, alpha)N-15 Reaction via THM
Cherubini S;Lamia L;Pizzone RG;Puglia S;Rapisarda GG;Romano S;Sergi ML;
2009-01-01
Abstract
The O-18(p, alpha)N-15 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.File in questo prodotto:
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