The 22Ne(p,γ)23Na reaction is involved in the hydrogen burning neon-sodium (NeNa) cycle. This cycle is active in asymptotic giant branch stars (AGB) as well as in novae. In the Gamow window temperature range (30MK< T < 420MK corresponding to proton center of mass energies 40 keV < E < 430 keV), the 22Ne(p,γ)23Na reaction rate is highly uncertain because of the contribution of a large number of resonances never measured directly. A study of this reaction has been carried out at the Laboratory for Underground Nuclear Astrophysics (LUNA), in the Gran Sasso National Laboratory, using a windowless gas target and two high-purity germanium detectors. Several resonances have been observed for the first time in a direct experiment.
Low-energy resonances in the 22Ne(p,γ)23Na reaction directly observed at LUNA / F. Cavanna, R. Depalo - In: CGS15 – Capture Gamma-Ray Spectroscopy and Related Topics / [a cura di] R. Schwengner, K. Zuber. - 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A, FRANCE : EDP Sciences, 2015. - ISBN 978-2-7598-1794-8. - pp. 1-3 (( Intervento presentato al 15. convegno International Symposium on Capture Gamma Ray Spectroscopy and Related Topics tenutosi a Dresden nel 2014 [10.1051/epjconf/20159303004].
Low-energy resonances in the 22Ne(p,γ)23Na reaction directly observed at LUNA
R. Depalo
2015
Abstract
The 22Ne(p,γ)23Na reaction is involved in the hydrogen burning neon-sodium (NeNa) cycle. This cycle is active in asymptotic giant branch stars (AGB) as well as in novae. In the Gamow window temperature range (30MK< T < 420MK corresponding to proton center of mass energies 40 keV < E < 430 keV), the 22Ne(p,γ)23Na reaction rate is highly uncertain because of the contribution of a large number of resonances never measured directly. A study of this reaction has been carried out at the Laboratory for Underground Nuclear Astrophysics (LUNA), in the Gran Sasso National Laboratory, using a windowless gas target and two high-purity germanium detectors. Several resonances have been observed for the first time in a direct experiment.
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