Thermal diffusion in the ternary system helium + neon + carbon dioxide

Abstract

The composition and the temperature dependence of the thermal diffusion factor for the ternary system He + Ne + CO₂ have been studied by the two-bulb method. The results cannot be interpreted satisfactorily by van der Valk's theory for the thermal diffusion in multi-component gas mixtures. A part of the discrepancy between experiment and theory is due to the presence of CO₂ as one of the components which possesses a large quadrupole moment.