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Two-step vacuum-ultraviolet visible excitation spectroscopy on the CO molecule

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Abstract

Two-step excitation spectroscopy has been carried out on several highly excited states of the CO molecule. In the first excitation step a tunable vacuum-UV system was used that exploits the technique of two-photon resonant sum-frequency mixing in a magnesium–krypton mixture. The second step was carried out by a tunable-dye-laser system in the visible part of the spectrum. The resulting double-resonance signal was detected by the laser-induced fluorescence from the final level as well as by a laser-reduced fluorescence from the intermediate level. The two-step excitation spectroscopy has been applied to several different problems, such as the analysis of perturbations, isotope shifts, predissociation, fine-structure splittings, and collision-induced transitions.

© 1985 Optical Society of America

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