Enhancement of the Excitation Function for the0+, 6.049-MeV State ofO16in the ReactionC12(O16,C12)O16

Excitation functions for the $0^{+}$, 6.049-MeV and $3^{-}$, 6.130-MeV states were measured separately at ${\theta }_{\mathrm{c}.\mathrm{m}.\mathrm{}}\sim 15.0°$, in steps of 86 keV from $E_{\mathrm{c}.\mathrm{m}.\mathrm{}}=22.7-33.0\mathrm{}$ MeV. Enhancement of the cross section by a factor of 2-5 above the constant cross section is clearly observed at 23.60, 24.60, 28.40, and 32.20 MeV, for the lowest three of which the most probable total spins, $J^{\pi }$, are found to be ${14}^{+}$, ${14}^{+}$, and ${15}^{-}$, respectively. These resonance energies are quite different from those for the $3^{-}$, 6.130-MeV state observed at 25.2 and 29.8 MeV.