Electron impact excitation cross sections for carbon monoxide

The authors present distorted-wave cross sections for excitation of the A 1 Pi , a 3 Pi , a' 3 Sigma +, D 1 Delta and d 3 Delta states of CO by electrons in the 20 to 50 eV energy range. In these studies both the initial and final distorted waves are obtained in the static-exchange field of the ground electronic state. Differential and integral cross sections are presented and compared with available experimental data and with other calculations. The calculated differential cross sections for the A 1 Pi and a 3 Pi states agree poorly in magnitude, but better in shape, with available experimental data. In general the distorted-wave cross sections differ substantially from those of plane-wave-type theories such as the Born-Ochkur-Rudge approximation