Vol. 31, issue 04, article # 1

Sinitsa L. N., Serdyukov V. I., Polovtseva E. R., Bykov A. D., Shcherbakov A. P. Study of the water vapor absorption spectrum in the visible region from 19480 to 20500 cm-1. // Optika Atmosfery i Okeana. 2018. V. 31. No. 04. P. 247–252. DOI: 10.15372/AOO20180401 [in Russian].
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Abstract:

The vibrational-rotational absorption spectrum of water vapor was recorded and analyzed in the visible region from 19480 to 20500 cm-1. The measurements were carried out at the IFS-125M Fourier spectrometer with a resolution of 0.05 cm-1 at a pressure of 26.3 mbar, a temperature of (24 ± 1) °C at an optical path 24 m long. We used a multipass White cell with a base length of 60 cm. The light-emitting diode was used as the radiation source. The signal-to-noise ratio was about 20000. As a result of the spectrum analysis, a list of more than 420 lines has been formed, which includes line centers and intensity and quantum vibrational-rotational identification. More than 220 vibrational-rotational energy levels of 21 upper vibrational states have been determined.

Keywords:

Fourier transform spectroscopy, absorption of water vapor, visible spectral range, parameters of spectral lines, energy levels

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