Abstract
The isotopic thermal-diffusion factor α0 for krypton has been determined over a temperature range of 242° to 643°K. An artificial mixture of krypton isotopes containing about 14% 82Kr and 10% 86Kr was utilized in this study in conjunction with a 10-tube swing separator, α0 being obtained from the concentration changes in these two isotopes only. A least-squares fitting procedure yields potential parameters α=16.1±0.6, and ε/k=244°±13°K for the exponential-six potential model. Further least-squares fitting with viscosity data gives rm=3.88±0.02 Å. Satisfactory agreements have been obtained, between experimental data and values calculated according to the present potential, for coefficients of diffusion and thermal conductivity. The calculated values for second virial coefficient from this potential, however, shows rather poor agreement with the experimental values.
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