Differential cross section for electron impact excitation of the a1Δg state of molecular oxygen in the 15-180° angular range

The absolute differential cross section has been measured for excitation of the v = 0 vibrational level of the a1Δg excited state of molecular oxygen in a wide scattering angle range from 15° to 180°. Magnetic angle changer technique has been used to detected electrons scattered in the backward direction.