TITLE

Measurement of the continuum absorption coefficient of water vapor near 14400 cm−1 (0.694 μm)

AUTHOR(S)
Tikhomirov, A. B.; Ptashnik, I. V.; Tikhomirov, B. A.
PUB. DATE
July 2006
SOURCE
Optics & Spectroscopy;Jul2006, Vol. 101 Issue 1, p80
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The continuum absorption coefficient (CAC) of water vapor ( k cont) in the visible region is determined for the first time from the data of laboratory measurements. For this purpose, the absorption spectra of water vapor in the region 14395–14402 cm−1 are recorded with the aid of a high-sensitivity photoacoustic spectrometer with a frequency-tunable single-pulse ruby laser, and the absorption measured in this transparency microwindow is compared with that calculated based on the HITRAN 2004 data bank. In the spectral region under study, k cont = (0.53 ± 0.18) × 10−9 cm−1 mbar−1 at a total pressure of a water vapor-nitrogen mixture of 1000 mbar and a temperature of 295 K. This value of the CAC is roughly 23% higher than the CAC value in the IO-CKD model of the continuum.
ACCESSION #
23019363

 

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