Enrichment of Heavy Oxygen by Thermal Diffusion Method

概要

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Enrichment of heavy oxygen isotopes was carried out by use of thermal diffusion columns, using the normal oxygen gas as the raw material. The dimention of the unit separation column was as follows: inner diameter the wall was 10mm, outer diameter of the hot wire was 0.72mm and the effective length of the column was 295cm. The apparatus consisted of eleven columns, overall effective length being 17.7m. Each column was constructed carefully so as to keep the wire at the centre in the column using micalex spacers.It was found that the equilibrium separation factor of unit column was 7.5 and approached the theoretical value, probably due the improvement of geometrical condition between the cold wall and the hot wire. If the equilibrium is established, the concentration of heavy oxygen in the bottom reservoir would reach more than 90 atom %. The transport of the heavy oxygen amounted to 1.8cc(18O2)/day.
日本質量分析学会の論文