Natural parity states of O16 at 11.09 and 12.05 MeV

The elastic scattering of alpha particles from C12 has been used to measure the spins, parities, and widths of two previously unassigned states of O16. These levels at excitation energies of 11.094±0.006 and 12.050±0.008 MeV were found to have Jπ=4+ and 0+, respectively, and center-of-mass widths of 0.3±0.1 and 1.5±0.5 keV, corresponding to values of the dimensionless reduced width θα2=10^-3 and 4×10^-4