THE ABSORPTION SPECTRUM OF NO2 IN THE 3 700–4 600 Å REGION

Abstract

An investigation of the absorption spectra of both 14NO2 and 15NO2 has revealed a long progression of red-degraded bands in the region 3 700–4 600 Å. The rotational analysis shows that these bands are the Ka = 0 ← 1 subbands of the electronic transition 2B1 ← 2A1. The interpretation of the bands is discussed, and a few remarks concerning the onset of predissociation at 3 979 Å are added.