Foreign-gas collision broadening of the far-infrared spectrum of water vapor

Details Foreign-gas collision broadening of the far-infrared spectrum of water vapor Foreign-gas collision broadening of the far-infrared spectrum of water vapor

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988josab...5..593g&link_type=abstract

Optical Society of America, Journal, B: Optical Physics (ISSN 0740-3224), vol. 5, March 1988, p. 593-601.

Physics

20

Infrared Spectroscopy, Molecular Collisions, Spectral Line Width, Water Vapor, Atmospheric Physics, Far Infrared Radiation, Molecular Rotation, Nitrogen, Oxygen Spectra, Rotational Spectra

Scientific paper

The far-infrared rotational spectrum of H2(O-16) has been studied in the spectral range 25-112/cm to measure the foreign-gas collision-broadened linewidths. Measurements of 17 lines broadened by nitrogen and 21 lines broadened by oxygen are reported. The measurements were made at 297 K. From these data, the widths due to air broadening are obtained. The experimental results are compared with recent theoretical calculations and with the case of a constant linewidth, equal to the average experimental width. There is some correlation between the relative experimental linewidths and the theoretical predictions. However, the simple assumption of a constant value for the collision-broadened linewidths gives a better representation for the case of N2- and O2-broadened linewidths than do present detailed theoretical calculations.

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