F19 (He3,d)Ne20Reaction at 20-23 MeV

14 deuteron groups populating levels to 10.26 MeV excitation in ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ have been measured with the ${}_{}{}^{19}{}_{}{}^{}\mathrm{F} ({}_{}{}^3{}_{}{}^{}\mathrm{He},d){}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ reaction. Excitation functions measured at ${\theta }_{\mathrm{lab}}=25\mathrm{} \mathrm{and} {45}^{\circ }$ from 20.0 to 21.2 MeV reveal little structure, and therefore probably little compound-nuclear contribution to the observed cross sections for the deuteron groups. In particular, the $2^{-}$ level at 4.97 MeV excitation, strongly populated at $E_{3_{\mathrm{He}}}=10\mathrm{}$ MeV, is weakly populated in the present energy range. The "$j$-forbidden" $4^{+}$ level at 4.25 MeV excitation, on the other hand, is strongly populated in the present energy range. A collective-model coupled-channel Born-approximation analysis of angular distributions measured at $E_{3_{\mathrm{He}}}=21\mathrm{} \mathrm{and} 23$ MeV is better able to explain the data than distorted-wave Born-approximation analysis for the positive-parity states. The negative-parity states are poorly described by both theories.