Transport Properties of Gaseous He 3 and He 4
1965; American Institute of Physics; Volume: 139; Issue: 4A Linguagem: Inglês
10.1103/physrev.139.a1076
ISSN1536-6065
AutoresL. Monchick, Edward A. Mason, Robert J. Munn, F.J. Smith,
Tópico(s)NMR spectroscopy and applications
ResumoA complete quantum phase-shift calculation of several transport coefficients of gaseous ${\mathrm{He}}^{3}$, ${\mathrm{He}}^{4}$, and ${\mathrm{He}}^{3}$-${\mathrm{He}}^{4}$ mixtures has been carried out from 0.2 to 300\ifmmode^\circ\else\textdegree\fi{}K for a Lennard-Jones (12-6) potential model. Emphasis was placed on those properties for which new experimental data had become available, which included the viscosity of ${\mathrm{He}}^{4}$, the thermal conductivity of ${\mathrm{He}}^{3}$ and ${\mathrm{He}}^{4}$, the spin diffusion of ${\mathrm{He}}^{3}$, and ordinary diffusion and thermal diffusion of ${\mathrm{He}}^{3}$-${\mathrm{He}}^{4}$ mixtures. Agreement was in general suprisingly good for a potential as simple as this. A rather more elaborate potential may be required to obtain agreement over the full range of experimental measurements of transport properties and equation-of-state properties of the helium isotopes, which extends from less than 1\ifmmode^\circ\else\textdegree\fi{}K to over 1000\ifmmode^\circ\else\textdegree\fi{}K.
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