Angular distributions of alpha groups corresponding to elastic scattering and inelastic excitation of C 12 to 4.43 MeV and of the proton group leading to the ground state of N 15 have been measured at eight different energies between 20 and 23 MeV. The angular distributions show major changes over 400-keV energy intervals similar to those observed at higher and lower energies for the same scattering processes. The backward peaking in the C 12 (Q:, p)~N 15 reaction is not maintained over the energy region 22 to 25 MeV, as previously thought, but decreases again at energies slightly greater than 22 MeV.