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Abstract
We discuss new results concerning the investigation of the 19F(p,α 0)16O reaction at very low energies (0.6-0.2 MeV). This reaction is important both in Nuclear Astrophysics, because it closes the CNOF cycle and it is an important fluorine destruction channel in hydrogen rich stellar environments, and in Nuclear Structure, because it allows to study the spectroscopy of the self-conjugated 20Ne compound nucleus. Despite its importance, very few direct data have been published at low energies in the literature. Our work allowed to deduce the S-factor down to ≈ 0.2 MeV and to point out the role played by broad resonances at low energies. The experimental S-factor is ≈1.5-2 times larger than non-resonant extrapolations reported by nacre with potentially important astrophysical consequences.
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Details
1 Dipartimento di Fisica, Università di Napoli Federico II, Via Cinthia, 80126, Napoli, Italy; INFN - Sezione di Napoli, Via Cinthia, 80126, Napoli, Italy
2 Dipartimento di Fisica ed Astronomia, Università di Catania, Via S. Sofia, 95125, Catania, Italy; INFN - Laboratori Nazionali del Sud, Via S. Sofia, 95125, Catania, Italy
3 INFN - Sezione di Napoli, Via Cinthia, 80126, Napoli, Italy
4 INFN - Laboratori Nazionali di Legnaro, Legnaro (Padova), Italy
5 INFN - Laboratori Nazionali del Sud, Via S. Sofia, 95125, Catania, Italy; Facoltà di Ingegneria e Architettura, Univ. Kore di Enna, Enna, Italy