Abstract
WHEN the lighter elements are bombarded with slow neutrons, atomic transmutation may occur with release Qf energy, Dr. J. Chadwick and Mr. M. Gold-haber, by the bombardment of lithium with neutrons from a radon-beryllium source slowed down by passage through paraffin wax, find that helium and triple-weight hydrogen (H3) are produced, about five million electron volts of energy being released at the same time. Boron gives a similar result, and these elements are therefore indicated as sensitive detectors for slow neutrons.
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