Physics – Chemical Physics
Scientific paper
Sep 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jchph..73.2740g&link_type=abstract
Journal of Chemical Physics, vol. 73, Sept. 15, 1980, p. 2740-2750.
Physics
Chemical Physics
69
Ammonia, Electron Gas, Energy Transfer, Gas-Gas Interactions, Helium, Interstellar Gas, Collision Rates, Gas Pressure, Microwave Resonance, Molecular Beams, Rotational And Vibrational Energy Transfer, Interatomic And Intermolecular Potentials And Forces, Potential Energy Surfaces For Collisions, Line And Band Widths, Shapes, And Shifts, Radio-Frequency And Microwave Spectra
Scientific paper
The paper presents a new electron gas intermolecular NH3-He potential determined by the Hartree-Fock results of Davis, Boggs, and Mehrotra (1979) with semiempirical long-range induction and dispersion terms. The resulting potential agrees with beam scattering and pressure broadening measurements; it was also found that the quadrupole induced dipole interaction is not as effective as the short range anisotropy. It was concluded that discrepancies remain in the quantitative description of energy transfer in the NH3-He system; discrepancies result from improper consideration of the dependence of cross-sections on degenerate magnetic quantum levels in the experimental investigation.
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