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  • 1
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    Rotational inelasticity in high-energy H2-H2 collisions (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Rotational cross sections for transitions in the H2-H2 system have been calculated for energies up to about 2.0 eV and for rotor levels up to j = 11 in the effective potential approximation. The cases of para H2-para H2, ortho H2-ortho H2 and ortho H2-para H2 are considered. Correlations and trends in the cross sections have been examined, and it is shown that the high-energy collisions are dominated by coupling effects. The results of this analysis also suggest that the collision process may be profitably viewed as a diffusion of probability among the levels.
    Keywords: ATOMIC AND MOLECULAR PHYSICS
    Type: Chemical Physics; 28; 1978
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Low-temperature rotational relaxation in gaseous H2 and D2 (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Various potentials have been used for generating scattering cross sections for rotational transitions in hydrogen isotope systems. Low-temperature rates were calculated and the relaxation times compared with the results of sound absorption experiments. It is seen that the existing potentials could still be improved since they do not exactly reproduce the experimental results.
    Keywords: ATOMIC AND MOLECULAR PHYSICS
    Type: Journal of Chemical Physics; 66; Apr. 1
    Format: text
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    NASA TECHNICAL REPORTS
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