Physics – General Physics
Scientific paper
Feb 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984phrva..29..595b&link_type=abstract
Physical Review A - General Physics, 3rd Series (ISSN 0556-2791), vol. 29, Feb. 1984, p. 595-604. NASA-supported research.
Physics
General Physics
38
Helium, Hydrogen, Molecular Collisions, Rotational Spectra, Vibrational Spectra, Absorption Spectra, Line Spectra
Scientific paper
An adiabatic quantal theory of spectral line shapes in collision-induced absorption and emission is presented which incorporates the induced translation-rotation and translation-vibration spectra. The generalization to account for the anisotropy of the scattering potential is given. Calculations are carried out of the collision-induced absorption spectra of He in collisions with H2 with ab initio electric dipole functions and realistic potentials. The anisotropy of the interaction potential is small and is not included in the calculations. The predicted spectra are in satisfactory agreement with experimental data though some deviations occur which may be significant. The rotational line shapes have exponential wings and are not Lorentzian. The connection between the quantal and classical theories is written out explicitly for the isotropic overlap induction.
Birnbaum George
Chu Shih-I
Dalgarno Alexander
Frommhold Lothar
Wright Louis E.
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