Abstract
IN the study of the slow-neutron ternary fission of uranium-235, there is evidence that short-range particles of greater mass than α-particles are emitted. Dewan and Allen1 have reported ionization chamber experiments indicating the emission of particles of mass 13 ± 4 having ranges less than 1 cm. of air, and Titterton2 has recorded events in photographic plates which suggest the emission of nuclei heavier than α-particles having ranges up to 3 cm. air equivalent. An example of such an event is given in Fig. 1, from which it will be seen that, owing to the short range of the third fragment, certain interpretation cannot be made.
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References
Dewan, J. T., and Allen, K. W., P.R. 76, 181 (1949).
Titterton, E. W. (unpublished experiments still in progress).
Hemmendinger, A., P.R. 73, 806 (1948), and erratum, P.R. 75, 1267 (1949).
Titterton, E. W., and Goward, F. K., P.R. 76, 142 (1949).
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GOWARD, F., TITTERTON, E. & WILKINS, J. Photo-Fission of Uranium with Possible Emission of a Beryllium Nucleus. Nature 164, 661 (1949). https://doi.org/10.1038/164661a0
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DOI: https://doi.org/10.1038/164661a0
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