nium, from the reaction UNs (d, s,)93ss. it is impossible to deduce from the absorption curve the relative intensities of the new 93 and of 93~, since the initial parts of the in- dividual absorption curves of these two activities might well be nearly identical. The rate of decay of the high en- ergy beta-particles (0.5-j, Mev) and gamma-rays from the 93 of uranium plus deuterons was determined. This gave a half-life of about 2 days for the new 93. This activity is probably to be assigned to 93~, 93~', or 93~5 formed in the reaction U~(tg, 2g)93sls, Uss5(g, g)93&s, or U&&(J 2~)935 respectively.
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Seaborg et al. (1946) studied this question.