Pressure dependence of the water vapor continuum absorption in the 3.5-4.0 micron region

Details Pressure dependence of the water vapor continuum absorption in the 3.5-4.0 micron region Pressure dependence of the water vapor continuum absorption in the 3.5-4.0 micron region

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apopt..18.1149w&link_type=abstract

Applied Optics, vol. 18, Apr. 15, 1979, p. 1149-1160.

Physics

Optics

10

Absorption Spectra, Infrared Absorption, Pressure Effects, Water Vapor, Atmospheric Windows, Infrared Windows, Molecular Absorption, Remote Sensors

Scientific paper

A line tunable deuterium fluoride laser was used to measure the pressure dependence of the water vapor continuum absorption at 25 C in the 3.5-4.0 micron spectral region. From measurements of the absorption of 14.3 torr of deuterium depleted water vapor buffered by several air-broadening pressures, an unexpectedly small foreign-to-self-broadening coefficient of 0.011 with a factor of 2 uncertainty as well as an unusually strong self-contribution for the water vapor continuum absorption were observed. These measurements can be used to infer contributions to the water vapor continuum in the 3-5 micron window from both far wing and aggregate-water-molecule type absorptions.

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