Isotope mixture enrichment and equipment therefor

A mixture of isotopes of an element belonging to the third group-first subgroup, or the fourth group-first subgroup, or the sixth group-second subgroup, or the rare gases group of the periodic system in the gaseous phase is introduced into a chamber filled with a sorption medium showing fixation properties and with a damping gas, inert to the isotope mixture as well as to the sorption medium. The fraction enriched by the least adsorbed isotope may be trapped at the chamber output. (B.S.)