Abstract
The ratios of the mean number of neutrons (ν) emitted in the fission of U233, U235 and Pu239 by thermal neutrons and by neutrons characteristic of a fission spectra have been measured. A method was employed in which the number of fission events was counted simultaneously with the number of coincidences between fragments and fission neutrons. It is found that the quantity ν increases by approximately 10% in all isotopes which were investigated.
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Literature cited
V. I. Kalashnikova, V. P. Zakharova, A. V. Krasnushkin, V. I. Lebedev and M. I. Pevzner. Conference on the Peaceful Uses of Atomic Energy, June 1–5, 1955, Acad. Sci. USSR, Div. Phys.-Math. Sci. (Acad. Sci. USSR Press, 1955) p. 161.
R B. Leachman, “Determination of fission quantities of importance to reactors” Report No. 592 presented by USA at the International Conference on the Peaceful Uses of Atomic Energy, 1955.
Additional information
In conclusion the authors wish to thank P. E. Nemirovsky for the interest which he has taken in this work.
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Kalashnikova, V.I., Lebedev, V.I. & Spivak, P.E. Relative measurements of the mean number of neutrons emitted in fission of U233, U235 and Pu239 by thermal neutrons and by neutrons characteristic of a fission spectra. The Soviet Journal of Atomic Energy 2, 17–20 (1957). https://doi.org/10.1007/BF01480701
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DOI: https://doi.org/10.1007/BF01480701