Dispersed fluorescence spectra of jet-cooled calcium ethoxide radicals (CaOC2H5). CASSCF calculations of vibrational frequencies and Franck-Condon factors of the Ã12A′/Ã22A″-X̃2A′ transitions. Differences between intensities of the Ã12A′→X̃2A′ and the Ã22A″→X̃2A′ DF spectra due to symmetry. Collision-induced population transfer between two nearly degenerate excited states (Ã1 and Ã2).