The ¹⁹F(α,p₁γ)²²Ne reaction and the abundance of fluorine in Asymptotic Giant Branch (AGB) stars.

C. Ugalde, A. Couture, J. Görres, E. Stech, and M. Wiescher

Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA

Recibido el 31 de enero de 2005
Aceptado el 3 de abril de 2005

Abstract

The ¹⁹F(α,p₁γ) reaction was investigated in the energy range E _α= 1.15 – 2.00 MeV. Eight resonances were found in the gamma excitation curve, five of which were not observed before. Energy and strength of the resonances were obtained and compared well to values available elsewhere (Kuperus, J., Physica 31, (1965) 1603).

Keywords: Asymptotic Giant Branch; Nuclear Astrphysics; Fluorine.

Resumen

La reacción ¹⁹F(α,p₁γ) ha sido investigada en el intervalo de energía E_α= 1.15 – 2.00 MeV. Se observaron ocho resonancias en la función de excitación, de las que cinco eran desconocidas a la fecha. Las energías e intensidades de las resonancias fueron obtenidas y son comparables con otros valores medidos previamente (Kuperus, J., Physica 31, (1965) 1603).

Descriptores: Astrofísica nuclear, Fluor.

PACS: 26.50.+x; 27.20.+n

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References

1. J. Kuperus, Physica 31 (1965) 1603.        [ Links ]

2. A. Jorrisen et al., Astron. Astrophys. 261 (1992) 164.        [ Links ]

3. S.E. Woosley et al., Astrophys. J. 356 (1990) 272.        [ Links ]

4. G.J. Mathews, Nature 359 (1992) 18.        [ Links ]

5. G. Gilmore, and J. Hemingway, Practical gamma–ray spectrometry, John Wiley and Sons Ltd (1995).        [ Links ]

6. E.L. Brady, and M. Deutsch, Phys. Rev. 78 (1950) 558.        [ Links ]

7. C.N. Yang, Phys. Rev. 74 (1948) 764.        [ Links ]

8. EG&G Ortec Catalog, Modular Pulse–Processing Electronics and Semiconductor Radiation Detectors (1995).        [ Links ]

9. C.E. Rolfs, and W.S. Rodney, Cauldrons in the Cosmos, University of Chicago Press (1988).        [ Links ]