Chemical Physics Letters, Vol.329, No.3-4, 271-282, 2000
Algebraic approach for the calculation of polyatomic Franck-Condon factors: application to the vibronically resolved absorption spectrum of disulfur monoxide (S2O)
Cavity ring-down spectroscopy (CRDS) has been employed to probe the (C) over tilde (1)A' <-- <(X)over tilde>1A' (pi* <-- ) absorption system of jet-cooled disulfur monoxide (S2O) molecules. Vibronically resolved features possessing up to 8 quanta of excitation in the v(2)' S-S stretching mode of the (C) over tilde state have been characterized, with the onset of rapid predissociation for v(2)' greater than or equal to 4 being manifest in the widths of band contours. Measured vibronic intensities are in good accord with predictions derived from a Lie algebraic (or vibron) treatment of Franck-Condon factors for the corresponding S2O emission spectrum.