First Experimental Limit on theNe19(p,γ)Na20Resonance Strength, of Astrophysical Interest

Autor: P. Van Duppen, Alain Ninane, Th. Delbar, Paul J. Sellin, Michel Gaelens, Freddy Binon, Jean Vanhorenbeeck, Peter Lipnik, Cs. Sükösd, R. Coszach, Patrick Decrock, G. Vancraeynest, P. Duhamel, I. Licot, P. J. Woods, W. Galster, Claude Michotte, Marc Huyse, E. Lienard, R. D. Page, Pierre Leleux, Michael Wiescher, T. Davinson, Jean Vervier, A. C. Shotter, C.R. Bain
Rok vydání: 1994
Předmět:
Zdroj: Physical Review Letters. 73:3066-3069
ISSN: 0031-9007
DOI: 10.1103/physrevlett.73.3066
Popis: The [sup 19]Ne([ital p],[gamma])[sup 20]Na reaction may influence considerably the reaction flow between the CNO and NeNa mass regions in high temperature hydrogen burning conditions. The 447 keV resonance has been studied by exploiting radioactive [sup 19]Ne beams with novel detection techniques to measure [beta][sup +]-delayed [alpha] radioactivity of [sup 20]Na nuclei produced in reactions with polyethylene targets. A 90% C.L. upper limit of 18 meV for the resonance strength has been determined and implications for the spin assignment of the 2.646 MeV state in [sup 20]Na and the stellar reaction are discussed.
Databáze: OpenAIRE