Toward a reassessment of the 19F(p, α0)16O reaction rate at astrophysical temperatures
The 19F(p, α0)16O reaction at low energies plays an important role in fundamental physics. In particular in nuclear astrophysics it represents, together with the 19F(p, γ)20Ne reaction, the crossing point between the CNO and the NeNa cycles in stars. Further, in hydrogen-rich stellar environments, i...
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doaj-9810ea71f42c481e84527583d42a8f812020-11-24T23:14:54ZengElsevierPhysics Letters B0370-26931873-24452015-09-01748C17818210.1016/j.physletb.2015.06.073Toward a reassessment of the 19F(p, α0)16O reaction rate at astrophysical temperaturesI. Lombardo0D. Dell'Aquila1A. Di Leva2I. Indelicato3M. La Cognata4M. La Commara5A. Ordine6V. Rigato7M. Romoli8E. Rosato9G. Spadaccini10C. Spitaleri11A. Tumino12M. Vigilante13Dip. di Fisica, Univ. di Napoli Federico II, via Cintia, Napoli, ItalyDip. di Fisica, Univ. di Napoli Federico II, via Cintia, Napoli, ItalyDip. di Fisica, Univ. di Napoli Federico II, via Cintia, Napoli, ItalyDip. di Fisica e Astronomia, Univ. di Catania, via S. Sofia, Catania, ItalyINFN – Laboratori Nazionali del Sud, via S. Sofia, Catania, ItalyDip. di Fisica, Univ. di Napoli Federico II, via Cintia, Napoli, ItalyINFN – Sezione di Napoli, via Cintia, Napoli, ItalyINFN – Laboratori Nazionali di Legnaro, Legnaro (Padova), ItalyINFN – Sezione di Napoli, via Cintia, Napoli, ItalyDip. di Fisica, Univ. di Napoli Federico II, via Cintia, Napoli, ItalyDip. di Fisica, Univ. di Napoli Federico II, via Cintia, Napoli, ItalyDip. di Fisica e Astronomia, Univ. di Catania, via S. Sofia, Catania, ItalyINFN – Laboratori Nazionali del Sud, via S. Sofia, Catania, ItalyDip. di Fisica, Univ. di Napoli Federico II, via Cintia, Napoli, ItalyThe 19F(p, α0)16O reaction at low energies plays an important role in fundamental physics. In particular in nuclear astrophysics it represents, together with the 19F(p, γ)20Ne reaction, the crossing point between the CNO and the NeNa cycles in stars. Further, in hydrogen-rich stellar environments, it is the most important fluorine destruction channel. In this paper we report new measurements on the 19F(p, α0)16O reaction at deeply sub-Coulomb energies (0.2–0.6 MeV), a region where, despite the key role of this reaction, very few and old data are reported. The deduced astrophysical S-factor is ≈1.5–2 times larger than currently adopted extrapolations with possibly important astrophysical consequences.http://www.sciencedirect.com/science/article/pii/S0370269315005031Nuclear reactionsFluorine nucleosynthesis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
I. Lombardo D. Dell'Aquila A. Di Leva I. Indelicato M. La Cognata M. La Commara A. Ordine V. Rigato M. Romoli E. Rosato G. Spadaccini C. Spitaleri A. Tumino M. Vigilante |
spellingShingle |
I. Lombardo D. Dell'Aquila A. Di Leva I. Indelicato M. La Cognata M. La Commara A. Ordine V. Rigato M. Romoli E. Rosato G. Spadaccini C. Spitaleri A. Tumino M. Vigilante Toward a reassessment of the 19F(p, α0)16O reaction rate at astrophysical temperatures Physics Letters B Nuclear reactions Fluorine nucleosynthesis |
author_facet |
I. Lombardo D. Dell'Aquila A. Di Leva I. Indelicato M. La Cognata M. La Commara A. Ordine V. Rigato M. Romoli E. Rosato G. Spadaccini C. Spitaleri A. Tumino M. Vigilante |
author_sort |
I. Lombardo |
title |
Toward a reassessment of the 19F(p, α0)16O reaction rate at astrophysical temperatures |
title_short |
Toward a reassessment of the 19F(p, α0)16O reaction rate at astrophysical temperatures |
title_full |
Toward a reassessment of the 19F(p, α0)16O reaction rate at astrophysical temperatures |
title_fullStr |
Toward a reassessment of the 19F(p, α0)16O reaction rate at astrophysical temperatures |
title_full_unstemmed |
Toward a reassessment of the 19F(p, α0)16O reaction rate at astrophysical temperatures |
title_sort |
toward a reassessment of the 19f(p, α0)16o reaction rate at astrophysical temperatures |
publisher |
Elsevier |
series |
Physics Letters B |
issn |
0370-2693 1873-2445 |
publishDate |
2015-09-01 |
description |
The 19F(p, α0)16O reaction at low energies plays an important role in fundamental physics. In particular in nuclear astrophysics it represents, together with the 19F(p, γ)20Ne reaction, the crossing point between the CNO and the NeNa cycles in stars. Further, in hydrogen-rich stellar environments, it is the most important fluorine destruction channel. In this paper we report new measurements on the 19F(p, α0)16O reaction at deeply sub-Coulomb energies (0.2–0.6 MeV), a region where, despite the key role of this reaction, very few and old data are reported. The deduced astrophysical S-factor is ≈1.5–2 times larger than currently adopted extrapolations with possibly important astrophysical consequences. |
topic |
Nuclear reactions Fluorine nucleosynthesis |
url |
http://www.sciencedirect.com/science/article/pii/S0370269315005031 |
work_keys_str_mv |
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