The excitation function for the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^{12}{}_{}{}^{}\mathrm{C},\alpha ){}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ reaction leading to the $2^{+}$ state at 7.83 MeV possesses oscillations similar in width to those observed for the low-lying states. For the 7.83-MeV state, the oscillations are considerably damped in magnitude and are superimposed on a large underlying cross section that varies much more slowly with energy.

• Received 5 July 1972

DOI:https://doi.org/10.1103/PhysRevC.6.1453