Hydrogen broadening and collision-induced line shifts of methane at 4200/cm

Details Hydrogen broadening and collision-induced line shifts of methane at 4200/cm Hydrogen broadening and collision-induced line shifts of methane at 4200/cm

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jqsrt..49...71m&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 49, no. 1, p. 71-79.

Physics

6

Hydrogen, Ionic Collisions, Methane, Planetary Atmospheres, Spectral Line Width, Least Squares Method, Spectral Bands, Water Vapor

Scientific paper

Many of the lines of the nu1 + nu4 and nu3 + nu4 bands of methane in the vicinity of 4200/cm have been assigned and are reported in the HITRAN data-base which is commonly used for atmospheric transmission calculations in the IR. The collision-induced broadening coefficients of hydrogen for more than 200 of these lines are reported. Also, by using the water-vapor lines which occur in the spectra as calibration marks, the frequencies of the broadened lines are determined. This permitted the collision-induced line shifts to be measured for lines sufficiently isolated from interfering blends: all of the shifts which could be reliably determined in this way were negative.

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