Energy Levels in F18 from the N14(α, α)N14 and N14(α, p)O17 Reactions

Abstract

Elastically scattered alpha particles from ${\mathrm{N}}^{14}$ and ground-state protons from the ${\mathrm{N}}^{14}(\alpha , p){\mathrm{O}}^{17}$ reaction show resonances at 2.88-, 3.09-, 3.60-, 3.67-, 3.72-, 4.00-, 4.05-, 4.11-, 4.28-, 4.50-, and 4.55-Mev bombarding energies, corresponding to excited states of the ${\mathrm{F}}^{18}$ nucleus at 6.65, 6.82, 7.21, 7.27, 7.30, 7.52, 7.56, 7.61, 7.74, 7.91, and 7.95 Mev. Scattering-matrix analysis of the elastically scattered alpha particles, together with angular distributions of the reaction protons, indicate that the 6.65-, 6.82-, 7.21-, 7.27-, 7.30-, 7.52-, 7.91-, and 7.95-Mev states in ${\mathrm{F}}^{18}$ probably have angular momenta and parities of $1^{-}$, $2^{-}$, $4^{+}$, $1^{+}$, $3^{-}$, $3^{-}$, $2^{-}$, and $1^{+}$, respectively.