Abstract
THE experiments of Halban, Joliot, and Kowarski described in NATURE1 give an indirect proof of the neutron multiplication accompanying the fission of uranium nuclei after neutron capture. It can be deduced from these experiments that the additional neutrons are, on the average, faster than the photo-neutrons from radium C-beryllium used as active primary radiation. This conclusion is confirmed in a subsequent note2 by the same authors in which they find that the neutrons contributed by uranium are able to produce the endo-energetic reaction S(n,p)P.
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References
NATURE, 143, 470 (1939).
C.R., 208, 995 (1939).
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ROTBLAT, J. Emission of Neutrons accompanying the Fission of Uranium Nuclei. Nature 143, 852 (1939). https://doi.org/10.1038/143852a0
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DOI: https://doi.org/10.1038/143852a0
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