Physics
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985cajph..63..625d&link_type=abstract
Canadian Journal of Physics (ISSN 0008-4204), vol. 63, May 1985, p. 625-631. NSERC-supported research.
Physics
27
Absorption Spectra, Infrared Absorption, Low Temperature, Molecular Collisions, Nitrogen, Fourier Transformation, Infrared Spectra, Interferometry, Line Shape, Microwave Spectra, Quadrupoles
Scientific paper
The collision-induced absorption (CIA) spectrum for nitrogen has been measured in the spectral region below 360/cm at 126, 149, 179, and 212 K. The measurements have been obtained using Fourier-transform infrared (FTIR) techniques, an FIR laser system operating at 84.2 and 15.1/cm, and microwave-cavity techniques. The experimental line shapes have been compared with the theoretical predictions of Joslin et al. (1984), based on information theory alone. The data have been used to determine the quadrupole moment employing various intermolecular potentials. One Lennard-Jones potential has resulted in a quadrupole moment of 1.51 B, the value that was used in generating the theoretical line shapes. These results, when combined with measurements on nitrogen mixed with methane and argon, may be helpful in determining the role of CIA in calculating the opacity of some planetary atmospheres.
Anderson Arlen
Dagg I. R.
Read A. A. L.
Smith William
Yan Shihao
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