• DOI:10.1103/PhysRevC.95.045803
• Corpus ID: 119190050

Measurement of 1323 and 1487 keV resonances inN15(α,γ)F19with the recoil separator ERNA

@article{Leva2017MeasurementO1,
  title={Measurement of 1323 and 1487 keV resonances inN15($\alpha$,$\gamma$)F19with the recoil separator ERNA},
  author={Antonino Di Leva and Gianluca Imbriani and Raffaele Buompane and Lucio Gialanella and Andreas Best and Sergio Cristallo and Mario De Cesare and Antonio D'Onofrio and J G Duarte and Leandro Romero Gasques and Lizeth Morales-Gallegos and Alessandro Pezzella and G Porzio and David Rapagnani and Vincenzo Roca and Mauro Romoli and Daniel Schurmann and Oscar Straniero and Frascati Italy and Infn Sezione di Napoli Napoli Italy and Dipartimento di Ingegneria Industriale Universita di Trento Italy and Inaf - Italy and Infn Sezione di Napoli Napoli Italy and Dipartimento di Metodologie e Tecnologie per le Osservazioni e Italy and Departamento de F'isica Nuclear Instituto de F'isica da Univers Brazil and Supa School of Physics and UK AstronomyUniversityofEdinburgh and Dipartimento di Ingegneria Industriale Universita di Trento Italy and Dipartimento di Ingegneria Industriale Universita di Trento Italy},
  journal={Physical Review C},
  year={2017},
  volume={95}
}

• A. Leva, G. Imbriani, +26 authors D. D. F. D. D. C. Italy
• Published 10 April 2017
• Physics
• Physical Review C

The origin of fluorine is a widely debated issue. Nevertheless, the ^{15}N({\alpha},{\gamma})^{19}F reaction is a common feature among the various production channels so far proposed. Its reaction rate at relevant temperatures is determined by a number of narrow resonances together with the DC component and the tails of the two broad resonances at E_{c.m.} = 1323 and 1487 keV. Measurement through the direct detection of the 19F recoil ions with the European Recoil separator for Nuclear Astrophysics (ERNA) were performed. The reaction was initiated by a 15N beam impinging onto a 4He windowless gas target. The observed yield of the resonances at Ec.m. = 1323 and 1487 keV is used to determine their widths in the {\alpha} and {\gamma} channels. We show that a direct measurement of the cross section of the ^{15}N({\alpha},{\gamma})^{19}F reaction can be successfully obtained with the Recoil Separator ERNA, and the widths {\Gamma}_{\gamma} and {\Gamma}_{\alpha} of the two broad resonances have been determined. While a fair agreement is found with earlier determination of the widths of the 1487 keV resonance, a significant difference is found for the 1323 keV resonance {\Gamma}_{\alpha} . The revision of the widths of the two more relevant broad resonances in the 15N({\alpha},{\gamma})19F reaction presented in this work is the first step toward a more firm determination of the reaction rate. At present, the residual uncertainty at the temperatures of the ^{19}F stellar nucleosynthesis is dominated by the uncertainties affecting the Direct Capture component and the 364 keV narrow resonance, both so far investigated only through indirect experiments.