Abstract
An attempt is made to correlate the continuous emission spectrum of the afterglow of SO 2 with the continuous absorption spectrum of the same compound. The investigation of their relative intensity distribution allows the estimation of a common spectral limit at 5·5 eV ± 0·1 eV. This seems to correspond to the dissociation energy of SO 2 into SO + O. The two spectra would then be due to transitions between the same levels, the absorption corresponding to dissociation and the emission to recombination. The large variation with temperature of the intensity of the continuous absorption spectrum may be explained by the Franck-Condon principle without assuming the formation of a new molecular species.
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