Abstract
WE have recently had the opportunity of obtaining a very strong preparation of the so-called transuranic elements, which are precipitated with platinum as sulphide in acid solution, from roughly 100 grams of uranium, after an irradiation with the neutrons of (7Li + 2H.) carried out for us in the Cavendish High-Voltage Laboratory. A deuteron current of 100 μa. at 900 kv. was employed over a period of several hours, and the source of neutrons and the uranium were surrounded with a large amount of paraffin so that ‘thermal’ as well as fast neutrons were effective in the transformation.
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References
Meitner, Hahn and Strassmann, Z. Phys., 106, 249 (1937).
Abelson, Phys. Rev., 55, 418 (1939).
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FEATHER, N., BRETSCHER, E. Atomic Numbers of the So-called Transuranic Elements. Nature 143, 516 (1939). https://doi.org/10.1038/143516a0
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DOI: https://doi.org/10.1038/143516a0
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