Absorption properties of infrared active gases at high pressures. I - CO2

Details Absorption properties of infrared active gases at high pressures. I - CO2 Absorption properties of infrared active gases at high pressures. I - CO2

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jqsrt..36..265f&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 36, Sept. 1986, p. 265-270.

Physics

19

Absorption Spectra, Carbon Dioxide, Gas Density, Infrared Radiation, Equations Of State, High Pressure, Lorentz Gas, Nitrogen, Virial Coefficients

Scientific paper

Self- and nitrogen-broadened absorptions of the 2.7 and 2.0-micron CO2 bands were measured at high pressures. The band intensities were found to be 76.0 + or - 0.6 and 1.46 + or 0.01/cm/(atm-cm)STP for the respective bands. The measured equivalent widths were found to be smaller under large absorber amounts than those calculated from the Lorentzian lines with half-widths linearly dependent on sample density, reflecting excess absorption in the band wings of calculated spectra. This discrepancy is examined in terms of non-Lorentzian behavior of the line profile and a nonlinear density dependence of the half-width.

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