Rotational analysis of the 2A′→2A″ emission band system of HO2 at 1.43 µm

Abstract

The HO₂²A′→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.