Separation of isotopes of chlorine in carbon tetrachloride by evaporation centrifuging

Foreword

It is the purpose of this paper to describe in some detail the development of a machine and of a method whereby considerable quantities of carbon tetrachloride may be rapidly obtained, enriched with the heavy isotope of chlorine. For the first time, this should make available to chemists, physicists and biologists material with which to conduct experiments concerning the nature and effects of heavy chlorine. Just as the discovery and subsequent availability of heavy hydrogen opened up new fields of research, it is expected that the rapid concentration of heavy chlorine in large quantities will stimulate and enlarge these same fields. While the material used in this work was chlorine (in the form of carbon tetrachloride) it is believed that the method will be equally successful with other isotopic elements, particularly the heavier ones which can exist in compounds readily vaporizable.

April 1939 C.S.