No abstract

The CO ϩ emission systems A-X and B-X have been studied using monochromatic photon excitation in the range 20-34 eV. The vibrational branching ratios (vЈϭ4,5)/(vЈϭ3,2) for the A-X system were found to remain essentially constant within this excitation range, while the (vЈϭ1,2)/(vЈϭ0) branching ratios for the B-X system show a 40% variation. These results are interpreted using quasidegenerate many-body perturbation theory in terms of non-Rydberg doubly excited resonances in CO, which rapidly autoionize to various lowlying CO ϩ states. It is suggested that some earlier observed variations in the photoionization branching ratios for the vЈϭ0 -2 levels of the CO ϩ X 2 ⌺ ϩ have the same origin. ͓S1050-2947͑97͒02106-9͔

No abstract

No abstract