The reaction ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$${(}^{19}$F,α${)}^{27}$Al was studied over the same energy range, $E_{\mathrm{c}.\mathrm{m}.\mathrm{}=16\mathrm{}–22}$ MeV, where previous elastic and inelastic measurements were found to exhibit large back angle oscillatory motion. Excitation functions and angular distributions were measured for a number of alpha particle groups. These excitation functions do not show a strong correlation among themselves, nor do they correlate strongly with the elastic and inelastic scattering data. The angular distributions for two resolved states and two unresolved groups have the same average slope without any discernible pattern. Hauser-Feshbach calculations are structureless and the calculated angular distributions have a much smaller slope than the data. Overall, we conclude that within the present study it has not been possible to identify unequivocally any resonances in the ${}_{}{}^{12}{}_{}{}^{}$C+ ${}_{}{}^{19}{}_{}{}^{}$F system.

• Received 27 June 1986

DOI:https://doi.org/10.1103/PhysRevC.34.2180