Analysis of perturbations in the a3II and A1II states of CO

• Published in: Journal of molecular spectroscopy Vol. 44; no. 2; pp. 383 - 399
• Main Authors: Field, R.W., Wicke, B.G., Simmons, J.D., Tilford, S.G.
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.11.1972
• ISSN: 0022-2852; 1096-083X
• DOI: 10.1016/0022-2852(72)90111-7

The results of an analysis of perturbations of the CO a3II and A1II states of the ⋯ (π2p)4(σ2p)(π*2p) electronic configuration by states of the ⋯ (π2p)3(σ2p)2(π*2p) configuration provide evidence for the following conclusions: (i) For perturbations between vibronic levels of a given pair of electronic states, the perturbation matrix element is the product of a vibrational factor and a constant electronic factor. (ii) Simple single configuration arguments successfully predict that all the electronic factors for the perturbations between levels of each pair of states can be related to two constants which are joint properties of the two electronic configurations σπ* and π3π*.