Optika Atmosfery i Okeana Journal

Vol. 31, issue 12, article # 9

Kapitanov V. A., Osipov K. Yu., Ptashnik I. V. Photoacoustic measurements of the water vapor continuum absorption in the 1.6 mm window. // Optika Atmosfery i Okeana. 2018. V. 31. No. 12. P. 995–1000. DOI: 10.15372/AOO20181209 [in Russian].
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Abstract:

The pure water vapor absorption spectra have been measured by the photoacoustic method in transparency microwindows near 6177 cm^-1 at several pressures at a room temperature. Cross section of the water vapor continuum absorption has been determined to be (5.4 ± 0.8) × 10^-24 × cm² × mol.^-1 × atm^-1. This value is 4 times lower than the data known from FTS measurements and 20 times higher than the results obtained from CRDS measurements in this transparency window.

Keywords:

continuum absorption, water vapor, atmospheric windows, photoacoustic spectrometer

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