On the Temperature Determination from Band-spectral Intensity Distribution

Abstract

In the positive column of the carbon arc at reduced pressure of air atmosphere, CN and CO molecules are produced and emit intense band-spectra. Their intensity distributions were measured and the rotational temperatures, determined.
In spite of the same discharge conditions, the rotational temperatures were found to be widely different; that is, T'(CN)=5200°K and T'(CO)=1600°K.
The discrepancy was discussed from the view-point of mechanism of molecular formations