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Absorptivity of water vapor for 10.6 micron radiationAttention is called to recent measurements of the absorptivity of water vapor to 10.6-micron laser radiation made using shock-heated H2O/H2 and H2O/Ar mixtures and a probe CO2 laser. It is noted that these measurements give values about a factor of 2 lower than Ludwig's (1971) low resolution values. It is also argued that Fowler's (1981) high values are not likely to be caused by excited water molecules. It is shown that very intense laser radiation would be required to obtain any appreciable vibrational nonequilibrium. Within the narrow spectral range of 944-948/cm, no significant variation in absorption coefficient (suitably normalized) is observed as a function of laser line, water vapor concentration, total pressure, or diluent gas.
Document ID
19820049588
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Pugh, E. R.
(Physical Sciences, Inc. Woburn, MA, United States)
Krech, R. H.
(Physical Sciences, Inc. Woburn, MA, United States)
Date Acquired
August 10, 2013
Publication Date
June 1, 1982
Publication Information
Publication: AIAA Journal
Volume: 20
Subject Category
Atomic And Molecular Physics
Accession Number
82A33123
Funding Number(s)
CONTRACT_GRANT: NAS8-33097
CONTRACT_GRANT: F04611-80-C-0042
Distribution Limits
Public
Copyright
Other

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