Modelling of collision-induced absorption spectra

Details Modelling of collision-induced absorption spectra Modelling of collision-induced absorption spectra

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jqsrt..31..235b&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 31, March 1984, p. 235-245. Research supporte

Statistics

Computation

28

Absorption Spectra, Helium Hydrogen Atmospheres, Molecular Collisions, Planetary Atmospheres, Radiative Transfer, Computer Programs, Dipole Moments, Line Shape, Molecular Rotation, Vibrational Spectra

Scientific paper

A simple formalism allows the computation of complete collision-induced translational-rotational-vibrational absorption spectra from interaction potential and induced dipole moment, with a precision of a few per cent and at a fraction (about 1/20) of the cost and complexity of full quantum line shape calculations. The reduced mass of the collisional complex and the temperatures must be sufficiently small so that the collisional pair may be considered a quantum system. A comparison of exact H2-He collision-induced absorption spectra with models generated according to the new prescription shows satisfactory agreement at temperatures from 50 to 300 K and suggests important applications, such as the modeling of radiative transfer in planetary atmospheres.

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