FIRST EXPERIMENTAL LIMIT ON THE NE-19(P,GAMMA)NA-20 RESONANCE STRENGTH, OF ASTROPHYSICAL INTEREST

Authors
PAGE RD VANCRAEYNEST G SHOTTER AC HUYSE M BAIN CR BINON F COSZACH R DAVINSON T DECROCK P DELBAR T DUHAMEL P GAELENS M GALSTER W LELEUX P LICOT I LIENARD E LIPNIK P MICHOTTE C NINANE A SELLIN PJ SUKOSD C VANDUPPEN P VANHORENBEECK J VERVIER J WIESCHER M WOODS PJ
Citation
Rd. Page et al., FIRST EXPERIMENTAL LIMIT ON THE NE-19(P,GAMMA)NA-20 RESONANCE STRENGTH, OF ASTROPHYSICAL INTEREST, Physical review letters, 73(23), 1994, pp. 3066-3069
Citations number
23
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
73
Issue
23
Year of publication
1994
Pages
3066 - 3069
Database
ISI
SICI code
0031-9007(1994)73:23<3066:FELOTN>2.0.ZU;2-S
Abstract
The Ne-19(p, gamma)Na-20 reaction may influence considerably the react ion flow between the CNO and NeNa mass regions in high temperature hyd rogen burning conditions. The 447 keV resonance has been studied by ex ploiting radioactive Ne-19 beams with novel detection techniques to me asure beta(+)-delayed alpha radioactivity of Na-20 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 th e spin assignment of the 2.646 MeV state in Na-20 and the stellar reac tion rate are discussed.