High-resolution spectrum of water vapor between 30 and 720 cm −1

Abstract

The pure rotational spectrum of natural water vapor between 30 and 720 cm −1 has been recorded by a double-beam Fourier spectrometer. The maximum resolution achieved was about 0.018 cm −1 and the accuracy of the observed line positions was better than ±0.001 cm −1 in favorable conditions. The 550 line positions observed have been compared with the values derived from rotation-vibration spectra. The strongest lines of the isotopic molecules H 2 18O, H 2 17O, and HD 16O have been identified and many rotational transitions in the vibrational level (010) have also been assigned.