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The bombardment of lithium by deuterons has been shown by Crane, Delsasso, Fowler and Lauritsen (1935) and by Rumbaugh and Hafstad (1936) to lead to the formation of a radioactive product which emits β-rays and has a half life of 0·88 sec. Recently, Lewis, Burcham and Chang (1937) showed that this emission of β-rays is accompanied by ∝-particle emission which decays with the same period. These two disintegrations may be explained by the following chain of reactions in which the radioactive 8Li nucleus with a half life of 0·88 sec. disintegrates into two ∝-particles and an electron and neutrino: 7Li + 2D = 8Li + 1H, 8Li = 4He + 4He + ē + v.
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Smith et al. (1938) studied this question.
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