ROUGH ESTIMATE OF THERMAL-DIFFUSION FACTOR FOR H-2-HT ISOTOPIC MIXTURE BY SEPARATIVE MEASUREMENT USING THERMAL-DIFFUSION COLUMN

The Chapman-Cowling (CC) formula as well as the Monchick-Sandler-Mason (MSM) formula for the thermal diffusion factor for H2-HT gas mixture were examined through separative analysis by comparing experimental results of isotope separation using thermal diffusion column. The CC formula could not explain quantitatively the thermal diffusion between H2 and HT, whatever parameters and/or intermolecular model potentials we chose. The Lennard-Jones potential was regarded as the most adequate one among the model potentials tested here for H2-HT gas mixture. The MSM formula was approximated so as to be evaluated even when input data for the formula are not available.