Electron-impact excitation of atomic oxygen

Excitation of the $3s^{3}S^{\ensuremath{\circ}}$ and $3p^{3}P$ states of atomic oxygen has been studied in detail for electron impact energies from 13.87 to 100 eV by use of a close-coupling approximation. The target states included in the expansion of the total wave function are represented by accurate configuration-interaction wave functions. The present results are in good agreement with the recent experiments for the dipole-allowed $^{3}P\ensuremath{-}3s^{3}S^{\ensuremath{\circ}}$ transition, but for the forbidden $^{3}P\ensuremath{-}3p^{3}P$ transition a large unresolved discrepancy exists.