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Adiabatic pressure dependence of the 2.7 and 1.9 micron water vapor bandsAn acoustic excitation technique is used to determine the adiabatic pressure derivative of the spectral absorptance of the 2.7 and 1.9 micron water vapor bands, and the 3.5 micron HCl band. The dependence of this derivative on thermodynamic parameters such as temperature, concentration, and pressure is evaluated. A cross-flow water vapor system is used to measure spectral absorptance. Taking F as the ratio of nonrigid to rotor line strengths, it is found that an F factor correction is needed for the 2.7 micron band. The F factor for the 1.9 micron band is also determined. In the wings of each band a wavelength can be found where the concentration dependence is predominant. Farther out in the wings a local maximum occurs for the temperature derivative. It is suggested that the pressure derivative is significant in the core of the band.
Document ID
19780032176
Document Type
Reprint (Version printed in journal)
Authors
Mathai, C. V.
(Oklahoma Univ. Norman, OK, United States)
Walls, W. L.
(Oklahoma Univ. Norman, OK, United States)
Broersma, S.
(Oklahoma, University Norman, Okla., United States)
Date Acquired
August 9, 2013
Publication Date
November 1, 1977
Publication Information
Publication: Optical Society of America
Subject Category
Atomic And Molecular Physics
Funding Number(s)
CONTRACT_GRANT: NAS8-30175
Distribution Limits
Public
Copyright
Other
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