Spectral characteristics and nature of the emission from explosions in a closed volume II. Explosions of CS2/O2=1/4 mixtures

Abstract

The paper describes experiments undertaken to secure additional spectral and energy measurements of the emission from explosions of mixtures of carbon disulfide with oxygen at atmospheric pressure and with the composition CS/sub 2//O/sub 2/ = 1/4. The true emission spectrum in the case of these explosions was obtained. It was found that the principal contribution to the observed emission is made by SO/sub 2/ molecules. It is possible that the emission of the SO radical is also present in the spectrum. Previous conclusions concerning superequilibrium intensity of the emission and the attribution of the luminosity exclusively to the radiative recombination reaction SO+O--SO/sub 2/+hv, are erroneous. The luminosity observed in the case of these explosions in a closed volume has a thermal equilibrium nature. The absorption cross-section of the SO/sub 2/ molecule, from which the emission of SO/sub 2/ in gases heated to 3500-3700 K can be calculated, for a wavelength of 380nm amounts to a value of about 3 X 10/sup -20/ cm/sup 2/.