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

Research output: Contribution to journalArticle

  • David A. Scott
  • Antonio Caciolli
  • Di Leva Antonino
  • Alba Formicola
  • Micha Anders
  • Daniel Bemmerer
  • Carlo Broggini
  • M Campeggio
  • Piero Corvisiero
  • Z Elekes
  • Zs Füloep
  • Giampiero Gervino
  • Alessandra Guglielmetti
  • Carlo Gustavino
  • Gy Gyürky
  • Gianluca Imbriani
  • Matthias Junker
  • Matthias Laubenstein
  • Roberto Menegazzo
  • Michele Marta
  • Enrico Napolitani
  • Paolo Prati
  • Valentino Rigato
  • Vincenzo Roca
  • Endre Somorjai
  • Corrado Salvo
  • Oscar Straniero
  • Frank Strieder
  • T Szücs
  • Filippo Terrasi
  • Davide Trezzi

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Original languageEnglish
Article number202501
Number of pages5
JournalPhysical Review Letters
Volume109
Issue number20
DOIs
StatePublished - 13 Nov 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 nova explosions. In this study, the reaction cross section has been measured directly for the first time in a wide energy range $E_{\rm cm} \simeq 200-370~{\rm keV}$ appropriate to hydrogen burning in classical novae. Also, the $E$=183~keV resonance strength, $\omega \gamma$=1.67$\pm$0.12~$\mu$eV, has been measured with the highest precision to date and the $^{17}$O(p,$\gamma$)$^{18}$F reaction rate has been improved by a factor of 4, thus leading to firmer constraints on accurate models of novae nucleosynthesis.

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