States in²⁰Ne from¹⁹F(p, p) and¹⁹F(p, α) reactions at E p=(1.5÷2.1) MeV

Absolute differential cross-sections for19F(p, p) elastic scattering and19F(p, ∝0-π), (p, ∝1-3)reactions were measured for E p=(1.5÷ ÷2.1) MeV. The elastic-scattering19F(p, p) data were analysed in the framework of the R-matrix theory. Six resonances have been observed and their parameters determined. Three other resonances have been identified in the19F(p, α) reactions. The 0+, 14.47 MeV state in20Ne has been identified as a T=1 state and is suggested to be the isobaric analogue state of the 4.315 MeV state in20F. © 1985 Società Italiana di Fisica.