Abstract
WE have searched in a number of ways for experimental evidence of the existence of neutrons of thermal energies, using a radon-beryllium source of fast neutrons and allowing them to diffuse through materials rich in hydrogen1. Until very recently we could find no such evidence, but repetition of one of our early trials, under much improved conditions, has strongly suggested the presence of such very slow neutrons.
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Fermi and others, Ricerca Sctentifica, October 1934.
ibid., December 1934.
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MOON, P., TILLMAN, J. Evidence on the Velocities of ‘Slow’ Neutrons. Nature 135, 904 (1935). https://doi.org/10.1038/135904a0
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DOI: https://doi.org/10.1038/135904a0
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