A method of standardizing polonium sources by measurement of the number of γ-rays is described. The hard γ-radiation of 0.773 MeV. energy emitted in the decay of 210 Po has been found to have an intensity of 1.8±0.14 × 10 -5 quanta per α-particle The internal conversion of this line to the extent of 6.7±1.7% gives rise to K X-radiation of lead. No other soft radiation was detected. The decay scheme of polonium is discussed.
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Grace et al. (1951) studied this question.
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