Backward-angle excitation functions have been measured for the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ + ${}_{}{}^{19}{}_{}{}^{}\mathrm{F}$ elastic and inelastic scattering between $E_{\mathrm{c}.\mathrm{m}.\mathrm{}}=7.4\mathrm{} \mathrm{and} 24.4$ MeV. Three prominent gross structures (18.0, 20.7, and 22.1 MeV) are observed. The corresponding back-angle elastic angular distributions can each be fitted by a $P_{L,0\mathrm{}}^2\left(cos\theta \right)$ function whose $L$ value tracks about one unit above $l_{\mathrm{grazing}}$.

• Received 27 March 1984

DOI:https://doi.org/10.1103/PhysRevLett.53.548