Variation of the Electronic Transition Moment and the Effective Vibrational Temperature in 4800–6700-Å System of MnO Molecule

Abstract

The 4800–6700-Å system of MnO has been excited in an arc. Using the photographic photometry, the relative band intensities have been measured. The data were interpreted with the aid of Franck-Condon factors and r centroids. The electronic transition moment is found to vary according to the relation Re(r) = const (1- 3.192 r + 1.99 r2), where 1.736≤ r≤ 1.90 Å. The slope of the straight line plot of log ∑ v″ I/v4 against G'(ν') for ν' progression gives an estimate of effective vibrational temperature to be 3860 K.