Spectroscopic parameters for certain band systems of astrophysically important molecule: Yttrium oxide

The Franck–Condon (FC) factors and r-centroids are defined through elementary integrals that involve vibrational wave functions on which they depend in a sensitive manner. The FC factors and r-centroids have been evaluated by a reliable numerical integration procedure on the basis of RKR potential energy model, for the A2Π3/2 − X2Σ+, A2Π1/2 − X2Σ+ and B2Σ+ − X2Σ+ band systems of the astrophysically important yttrium oxide molecule. RKR and Morse potential values have been generated for all the four electronic states of YO molecule. All of these three systems of YO show significant rotational independence.