2-NU-2-NU-2 AND 2-NU-2 BANDS OF (H2O)-O-16, (H2O)-O-17, AND (H2O)-O-18 - LINE POSITIONS AND STRENGTHS

High-resolution spectra of (H2O)-O-16, (H2O)-O-17, and (H2O)-O-18 were recorded with a Fourier-transform spectrometer, covering transitions in the (020)-(010) and (020)-(000) bands. The measured line frequencies were used to determine high-accuracy values of rotational energy levels in the (020) vibrational states for the three isotopic species. Measurements of the line strengths were fitted to a model in which 19 transition moment parameters were determined for each band and molecule. The fitting technique did not consider interactions between the (020), (100), and (001) vibrational states. The experimental results provide a more accurate representation of the line positions and strengths than those currently available for these bands.