Thermal diffusion factors at low temperatures for gas phase mixtures of isotopic helium

Autor:	F. R. Meeks, J. J. Hurly, W. L. Taylor
Rok vydání:	1992
Předmět:	Maxwell–Boltzmann statistics Vapor phase General Physics and Astronomy chemistry.chemical_element Thermodynamics Thermal diffusivity Potential energy Gas phase symbols.namesake chemistry Bose–Einstein statistics symbols Physical and Theoretical Chemistry Quantum statistical mechanics Helium
Zdroj:	The Journal of Chemical Physics. 96:3775-3781
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.461883
Popis:	Vapor phase thermal diffusion measurements with considerably less scatter than previous data for equimolar mixtures of 3He and 4He are examined against the most recent interparticulate potential function for helium. Calculations are done for the purely classical case; for the quantal (phase‐shift) case using Boltzmann statistics; and for the quantal case with Fermi–Dirac statistics for 3He and Bose–Einstein statistics for 4He. A ‘‘hump’’ appearing in the quantum‐statistical curve, which is in disagreement with the experimental results, indicates that at the vapor densities reported here the use of quantum statistics is unnecessary.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fc6330cccfe5d9f05f9bc397c23449a4 https://doi.org/10.1063/1.461883 Zobrazit plný text záznamu