Abstract
WHEN uranium or thorium is bombarded with neutrons, a number of radioactive bodies are formed with periods ranging from a few seconds to several days. The decay of this assembly of fission products (not chemically separated) has been studied by Bjerge, Brostrøm and Koch1 and found to be practically the same for thorium and uranium. They have pointed out that this may be due partly to the fact2 that some of the fission products are the same for uranium and thorium but that, apart from this, the large number of periods would tend to wipe out any individual features of the decay curve.
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References
Bjerge, Brostrøm and Koch, NATURE [143, 794 (1939)].
Hahn and Strassmann, Naturwiss., 27, 89 (1939). Aten, Bakker and Heyn, NATURE, 143, 679 (1939).
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FRISCH, O. Statistical Calculation of Composite Decay Curves. Nature 143, 852–853 (1939). https://doi.org/10.1038/143852b0
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DOI: https://doi.org/10.1038/143852b0
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