EMPIRICAL INFRARED ABSORPTION COEFFICIENTS OF H2O FROM 300K TO 3000K

Abstract

A set of absorption coefficients for water vapor as functions of temperature has been empirically deduced from existing quantitative absorption and emission spectra between 1 and 22 microns. The basic assumption was made that, for optically thick gases, the curve of growth is given by a statistical model. The absorption coefficients were obtained for each vibration-rotation band by adjusting the band averaged line half widths and line spacings such that the integral of the absorption coefficients was equal to the known integrated intensity of the particular band at a given temperature. The effect of foreign gas broadening and non-resonant water molecule broadening was included. The present results are compared with independent theoretical and experimental results and the agreement is satisfactory.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1965
Accession Number
AD0625582

Entities

People

  • A. L. Thomson
  • C. B. Ludwig
  • C. C. Ferriso

Organizations

  • General Dynamics

Tags

DTIC Thesaurus Topics

  • Absorption
  • Absorption Coefficients
  • Absorption Spectra
  • Agreements
  • Carbon Dioxide
  • Coefficients
  • Diatomic Molecules
  • Experimental Data
  • Frequency
  • Gases
  • High Temperature
  • Measurement
  • Molecules
  • Physics Laboratories
  • Radiation
  • Spectra
  • Water Vapor

Readers

  • Molecular Photonics/Laser Physics
  • Regression Analysis.

Technology Areas

  • Space