Excitation of N v by electron impact

Collision strengths for electron impact excitation of Nv at an incident energy of 6.0 Ryd are calculated in a number of close-coupling approximations. Coupling effects are found to be more important than exchange effects for the 2s-3p transition which result in a close-coupling collision strength 40% larger than that calculated in a distorted wave approximation by Flower (see abstr. A76970 of 1972). For 2s-3s and 2s-3d transitions exchange effects are more important than coupling effects, and the close-coupling and distorted wave results agree to within 13%.