Thermal diffusion factors for the 4He-20Ne system at low temperatures

Thermal diffusion factors for the 4He–20Ne system have been measured in a low temperature region previously unexplored (down to 31 K) using a trennschaukel. Both quantum and classical transport collision integrals were evaluated for a recently proposed helium–neon intermolecular potential of the Har...

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Bibliographic Details
Published in:The Journal of chemical physics 1985-03, Vol.82 (6), p.2745-2750
Main Authors: TAYLOR, W. L, CAIN, D, MEEKS, F. R, PICKETT, P. T
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Other techniques and industries
Physics
Physics of gases
Physics of gases, plasmas and electric discharges
Viscosity, diffusion and thermal conductivity
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Summary:Thermal diffusion factors for the 4He–20Ne system have been measured in a low temperature region previously unexplored (down to 31 K) using a trennschaukel. Both quantum and classical transport collision integrals were evaluated for a recently proposed helium–neon intermolecular potential of the Hartree–Fock dispersion (HFD) type which has been shown to correlate cross section and transport property data quite well. The present data agree extremely well with the quantum mechanically calculated thermal diffusion factors. The classically calculated values fall considerably lower.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.448272