Thermal diffusion in mixtures of the inert gases

摘要: Measurements have been made of the separation produced by thermal diffusion in all binary mixtures inert gases (except Kr-X and Rn mixtures) at temperatures ranging from -180 to 400 degrees C. The temperature dependence ratio, k$\_{T}$, R$\_{T}$(R$\_{T}$ = k$\_{T}$/[k$\_{T}$($\infty $)]$\_{1}$, where [k$\_{T}$($\infty $)]$\_{1}$ is theoretical value for molecules behaving like rigid elastic spheres) has deduced. results indicate that, general, R$\_{T}$ increases with lower range becomes constant high temperatures. first attained a which varies mixture mixture, but its magnitude nearly same mixtures. It corresponds repulsive force index 11, if are treated as centres only. compared those calculated R. Clark Jones (1940, 1941) gas two molecular species identical fields Lennard-Jones type, $\nu $ 9 attractive ^{\prime}$ 5. give function T/T$\_{C}$, T$\_{C}$ critical gas. This relation supported experimental results, though there difficulties comparison due non-identical nature appears, however, that observed behaviour could be explained model indices were suitably chosen, study R$_{T}$ isotopic would enable determined some precision.