Higher ro-vibrational levels of H2O deduced from high resolution oxygen-hydrogen flame spectra between 2800–6200 cm-1

Abstract

Hydrogen-oxygen flame spectra have been recorded from 2850 cm^-1 to 6200 cm^-1 with a high resolution Fourier transform spectrometer at a limit of resolution of about 0·015 cm^-1, and the emission spectrum of hot water vapour has been obtained. The complete analysis of the v ₁, v ₃ and v ₂ + v ₃ bands has been performed. A large set of new higher rotational energy levels for the (000), (100), (001) and (011) vibrational states is reported. A discussion of the assignment problem and of the least squares method for deriving the energy levels from the observed transitions is detailed.