Electron collisional excitation of C III and O V

Abstract

The R-matrix method is being used to determine the collisional excitation cross sections between the 2s^{2 1}S^e, 2s2p ³P^o, ¹P^o and the 2p^{2 3}P^e, ¹D^e, ¹S^e target eigenstates of the beryllium isoelectronic sequence. The first results for the 2s^{2 1}S³-2s2p ³P^o and 2s^{2 1}S^e-2s2p ¹P^o transitions for C III and O V are presented and compared with earlier distorted-wave and close-coupling results. The results indicate that the use of accurate target eigenstates and a more accurate treatment of the collision problem may change the cross sections by as much as 20% from earlier work.