TRANSITION-PROBABILITIES IN OH A(2)SIGMA(-X(2)PI(I) - BANDS WITH V'=2AND V'=3())

Experimental relative vibrational band emission coefficients have been measured in the A (2) Sigma(+)-X (II)-I-2 electronic system of the OH radical. Branching ratios for the sequences v'=2, v '' = 0-5 and v'=3 , v '' = 0-6 were determined using laser-induced fluorescence in a low pressure methane-oxygen flame. We accounted for potential error contr ibuted by rotational and vibrational energy transfer and fluorescence polarization. These transition probabilities complete a set of experim ental data, which are used in a separate study to determine the optimu m electronic transition moment of the OH A -X system. (C) 1997 America n Institute of Physics.