Variation with Temperature of the Continuous Absorption Spectrum of Diatomic Molecules: Part I. Experimental, The Absorption Spectrum of Chlorine

Abstract

A photographic method was used to investigate the continuous absorption spectrum of chlorine at 18°, 168°, 281°, 426°, 580° and 765°C. The effect of increasing the temperature is to decrease the absorption coefficient at the maximum, and to broaden the region of continuous absorption. The results were analyzed to obtain the contributions of individual vibrational levels to the total absorption. The absorption from the level $v^{\prime \prime }=0\mathrm{}$ has a single maximum, that from the level $v^{\prime \prime }=1\mathrm{}$ has two maxima, and it appears probable that the absorption from the level $v^{\prime \prime }=2\mathrm{}$ has three maxima.