Collision-induced rototranslational absorption spectra of N2-N2 pairs for temperatures from 50 to 300 K

Details Collision-induced rototranslational absorption spectra of N2-N2 pairs for temperatures from 50 to 300 K Collision-induced rototranslational absorption spectra of N2-N2 pairs for temperatures from 50 to 300 K

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...311.1043b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 311, Dec. 15, 1986, p. 1043-1057.

Astronomy and Astrophysics

Astrophysics

56

Absorption Spectra, Molecular Collisions, Molecular Rotation, Nitrogen, Pair Production, Satellite Atmospheres, Far Infrared Radiation, Gas Temperature, Saturn Satellites, Titan, Translational Motion

Scientific paper

Existing laboratory measurements of the far-infrared collision-induced spectra of gaseous nitrogen at temperatures from 124 to 300 K are analyzed on the basis of quantum line shapes computed from a suitable, advanced isotropic potential and multipole-induced dipole functions. The input is chosen to represent most closely the measurements at all temperatures and over the full range of frequencies. Simple analytical expressions are specified which represent the spectral profiles closely. It is thus possible to reproduce the collision-induced absorption spectra of nitrogen effortlessly in seconds at temperatures from 50 to 300 K on small computers, even in the far wings which never have been modeled from a quantum formalism before. The work thus gives new and reliable spectral intensities and their temperature dependence for a detailed analysis of the Voyager IRIS spectra of Titan's atmosphere.

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