Integrated intensities of N2, CO2, and SF6 vibrational bands from 1800 to 5000/cm as a function of density and temperature

Details Integrated intensities of N2, CO2, and SF6 vibrational bands from 1800 to 5000/cm as a function of density and temperature Integrated intensities of N2, CO2, and SF6 vibrational bands from 1800 to 5000/cm as a function of density and temperature

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jqsrt..42..465t&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 42, Dec. 1989, p. 465-476.

Physics

9

Carbon Dioxide, Nitrogen, Sulfur Fluorides, Vibrational Spectra, Absorption Spectra, Molecular Collisions, Spectral Bands, Temperature Distribution

Scientific paper

The integrated intensities of selected vibrational bands of N2, CO2, and SF6 have been measured as a function of density and temperature. The densities were varied from 0.00004 to 0.003 mol/cu cm and the temperatures from 296 to 470 K. The spectral range covered was from 1800 to 5000/cm. For N2, the collision-induced absorption in the region of the fundamental vibrational band at 2330/cm was observed. Only a few measurements above room temperature have been reported; these results extend the data base of this band. Both IR-allowed bands and collision-induced-absorption bands of CO2 were observed. The integrated intensity of the allowed bands was found to be linear in density and independent of temperature. The observed collision-induced-absorption bands yielded integrated intensities which were quadratic in density and showed no temperature dependence. All of the observed bands of SF6 were IR-allowed. No nonlinear behavior of the integrated intensities of any of these bands could be ascertained, even at the highest densities. Also, no temperature dependence was observed over the temperature range investigated.

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