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  1. Pubblicazioni

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

Articolo
Data di Pubblicazione:
2012
Abstract:
Classical novae are important contributors to the abundances of key isotopes, such as the radioactive ^{18}F, whose observation by satellite missions could provide constraints on nucleosynthesis models in novae. The ^{17}O(p,\gamma)^{18}F reaction plays a critical role in the synthesis of both oxygen and fluorine isotopes but its reaction rate is not well determined because of the lack of experimental data at energies relevant to novae explosions. In this study, the reaction cross section has been measured directly for the first time in a wide energy range Ecm = 200 - 370 keV appropriate to hydrogen burning in classical novae. In addition, the E=183 keV resonance strength, \omega \gamma=1.67\pm0.12 \mueV, has been measured with the highest precision to date. The uncertainty on the ^{17}O(p,\gamma)^{18}F reaction rate has been reduced by a factor of 4, thus leading to firmer constraints on accurate models of novae nucleosynthesis
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
Solar and Stellar Astrophysics (astro-ph.SR), Nuclear Experiment (nucl-ex)
Elenco autori:
D. A. Scott; A. Caciolli; A. DiLeva; A. Formicola; M. Aliotta; M. Anders; D. Bemmerer; C. Broggini; M. Campeggio; P. Corvisiero; Z. Elekes; Zs. Fülöp; G. Gervino; A. Guglielmetti; C. Gustavino; Gy. Gyürky; G. Imbriani; M. Junker; M. Laubenstein; R. Menegazzo; M. Marta; E. Napolitani; P. Prati; V. Rigato; V. Roca; E. Somorjai; C. Salvo; O. Straniero; F. Strieder; T. Szücs; F. Terrasi; D. Trezzi
Autori di Ateneo:
GERVINO Gianpiero Renato
Link alla scheda completa:
https://iris.unito.it/handle/2318/118524
Pubblicato in:
PHYSICAL REVIEW LETTERS
Journal
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