The shape of collision broadened lines from resonance to the far wings

Details The shape of collision broadened lines from resonance to the far wings The shape of collision broadened lines from resonance to the far wings

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jqsrt..21..597b&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 21, June 1979, p. 597-607.

Physics

24

Molecular Collisions, Molecular Spectra, Spectral Line Width, Absorption Spectra, Analytic Functions, Correlation, Resonant Frequencies, Spectral Bands

Scientific paper

A line shape is obtained for pressure broadened molecular lines at low pressures. The line has the Lorentz shape near resonance but an exponential dependence on frequency in the far wings where the frequency deviation from resonance is greater than the inverse of tau2 (tau2 is a measure of the duration of the collision and is related to the mean-squared torque produced in bimolecular collision). The theory is applied to the absorption in the high-frequency far wing of the 4.3-micron band in CO2.

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