Document Detail


Infrared water vapor continuum absorption: equilibria of ions and neutral water clusters.
MedLine Citation:
PMID:  20309306     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
The temperature dependence of (C(o)(s))lambda, the self-broadening coefficient for the water vapor continuum absorption at wavelength lambda, can be modeled by the equilibrium ion product of water which is tabulated widely in physics texts and handbooks. A theoretical basis for this modeling is developed from water cluster theory, and it is shown that experimental values of (C(o)(s))lambda. could be seriously in error, especially at high temperatures, if the saturation ratio (fractional RH) of water vapor is not taken into account by the experimenter for reasons other than normalization of the coefficient for partial pressure of the sample. An explanation is suggested for the departure of (C(o)(s))lambda from the usual negative dependence on increasing water vapor temperature in some experiments. Figures are given showing equilibrium sizes and populations of neutral water clusters and ions in water vapor as functions of humidity and temperature, based in part on data of Bignell and other workers.
Authors:
H R Carlon
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Applied optics     Volume:  20     ISSN:  0003-6935     ISO Abbreviation:  Appl Opt     Publication Date:  1981 Apr 
Date Detail:
Created Date:  2010-03-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0247660     Medline TA:  Appl Opt     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1316-22     Citation Subset:  -    
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