Abstract
THE usual method of separating solid radioactive particles from the gas phase is precipitation by an electric field. This is the classical procedure for the collection of the active deposit of radon and thoron, and can also be applied to artificial radio-elements, such as radio-arsenic prepared in arsine by neutron bombardment1. The process depends on the presence of an electric charge on the particles ; and unfortunately, at least in the case of artificial radio-elements produced by slow neutrons, such a charge does not necessarily exist. It is, therefore, of practical as well as theoretical importance to seek other means of concentrating the radioactive particles. One promising means which we have tried is thermal precipitation, which is based upon a very simple principle.
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References
Paneth, F. A., and Fay, J. W. J., NATURE, 135, 820 (1935). J. Chem. Soc., 384 (1936).
For literature and details see Watson, H. H., Trans. Faraday Soc., 32, 1073 (1936).
See Green, H. L., Trans. Faraday Soc., 32, 1091 (1936).
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PANETH, F., ROSENBLUM, C. Thermal Precipitation of Radioactive Substances. Nature 139, 796–797 (1937). https://doi.org/10.1038/139796b0
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DOI: https://doi.org/10.1038/139796b0
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