Rotational analysis of the2A′→2A″ emission band system of HO2at 1.43 µm

Abstract
The HO2 2A′→2A″ emission band at 1.43 µm has been recorded at a resolution of 0.3 cm–1 by use of a SISAM interferometer. Only K′ < 2 levels are found. A full spectroscopic study has been carried out and rotational constants obtained for the 2A′ and 2A″ states, the latter being in agreement with those recently obtained using the laser paramagnatic resonance technique. The 1.51 µm emission and previously assigned to HO2 is found to be due almost entirely to the OH radical.