The ${\mathrm{F}}^{19}(\alpha ,t){\mathrm{Ne}}^{20}$ reaction has been studied at 28.5 MeV. Angular distributions absolute cross sections have been measured from 15° to 170° for transitions leading to the ground ($0^{+}$), 1.63-MeV ($2^{+}$), 4.25-MeV ($4^{+}$), and 4.97-MeV ($2^{-}$) states. The 5.63-MeV ($3^{-}$) and 5.80-MeV ($1^{-}$) levels were observed, but not resolved; this was also the case for the 7.02-MeV ($4^{-}$), 7.19-MeV ($3^{-}$), and 7.22-MeV ($0^{+}$) levels. The 6.75-MeV ($0^{+}$) level was barely excited in the reaction. The angular distributions of the tritons to all the final states in ${\mathrm{Ne}}^{20}$, with the possible exception of the 4.97-MeV level, show the characteristics of a stripping mechanism. The possibility of intermediate inelastic excitations in the stripping to the 4.25-MeV level is discussed. The angular distributions have been fitted with a zero-range distorted-wave Born approximation, and ratios of spectroscopic factors have been compared with the predictions of the Nilsson model and Harvey's $\mathrm{SU}\left(3\right)\mathrm{}$ shell-model calculations for ${\mathrm{Ne}}^{20}$.

• Received 9 January 1967

DOI:https://doi.org/10.1103/PhysRev.158.917