The Ultraviolet Absorption of NO2

Abstract
A system of eight discrete and several diffuse bands in the ultraviolet absorption spectrum of NO2 has been analyzed. From the positions of the bands and their temperature coefficient of absorption the upper state intervals have been determined as 523 and 714 cm—1, those of the lower state as 749 and 1319 cm—1. The latter are not the same as the fundamentals deduced from infra-red data. Different possibilities of reconciling these intervals are discussed.