Abstract
Using a Fourier-transform spectrometer, we have measured the absorption spectrum of H2 18O vapor in the range 13400–14460 cm−1 at room temperature with a resolution of 0.03 cm−1 and a threshold sensitivity in absorption of 10−6 cm−1. With a multipass cell, the volume of which was 3 L and the base of which was 25 cm, a length of the absorbing layer of 10 m has been achieved. A high signal-to-noise ratio, on the order of 1000, has allowed us to detect about 700 lines of the H2 18O molecule, the intensities of which were as low as 10−25 cm/molecule, at 296 K. The observed lines have been attributed to eleven vibrational-rotational bands of the molecule.
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Original Russian Text © S.S. Vasil’chenko, S.N. Mikhailenko, V.I. Serdyukov, L.N. Sinitsa, 2012, published in Optika i Spektroskopiya, 2012, Vol. 113, No. 5, pp. 499–504.
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Vasil’chenko, S.S., Mikhailenko, S.N., Serdyukov, V.I. et al. The absorption spectrum of H2 18O in the range 13400–14460 cm−1 . Opt. Spectrosc. 113, 451–455 (2012). https://doi.org/10.1134/S0030400X12110069
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DOI: https://doi.org/10.1134/S0030400X12110069