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 + 1.99r2), 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.
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