Experimental Doppler-limited spectra of the ν_2 bands of H_2^16O, H_2^17O, H_2^18O, and HDO by Fourier-transform spectroscopy: secondary wave-number standards between 1066 and 2296 cm^−1
Аннотация:More than 2000 absolute wave numbers of 7 vibrational bands of H216O, H217O, H218O, and HDO (natural abundance) measured with a Fourier interferometer between 1066 and 2296 cm−1 are provided, with the greatest uncertainty about 50 × 10−6 cm−1 (1.5 MHz). These experimental values extracted from 12 different absorption spectra reveal a much greater consistency and are consequently given in inverse centimeters to the sixth decimal place. The spectral range covered corresponds to a large zone for which experimental accurate data were almost nonexistent. The precise knowledge of these strong atmospheric ν2 bands is of interest for astronomical studies. It will also improve with complementary recent similar work on N2O, the calibration of diode lasers, and Fourier-transform and classical spectrometers and will facilitate the coincidence search with laser radiation. For convenience, the wave numbers of the lines and their absolute uncertainty are given with their rotational and vibrational assignments and their experimental half-widths and intensities.
