Abstract
Fourier transform spectra of 18O-enriched, 17O-enriched, and natural water vapor recorded between 9600 and 11 400 cm -1 have been analyzed to assign the H 2 17O spectral lines. More than 1000 transitions were finally assigned to the H 2 17O isotopic species leading to 420 precise experimental energy levels of the (0 0 3), (2 0 1), (1 2 1), (1 0 2), (3 0 0), (2 2 0) vibrational states. Rotational, centrifugal distortion, and resonance coupling parameters have been derived from the fit of the experimental energy levels to an effective Hamiltonian based on Padé–Borel approximants well suited to describe the large centrifugal distortion in H 2O. The resulting rms deviation is 0.013 cm -1 with 97 varied parameters.
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