Résumé : Resonances in Na20 above the proton threshold have been studied by scattering radioactive Ne19 beams off thick polyethylene targets. The isobaric F19+p scattering was also examined. The analysis of the data under different theoretical approaches is discussed. The energy, total width, spin, and parity of two resonances in Na20 were assigned unambiguously. The results are compared to those obtained by indirect methods. © 1994 The American Physical Society.