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The Period of Decay of Radium B and Radium C

Published online by Cambridge University Press:  24 October 2008

P. Bracelin
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Extract

Measurements of the saturation currents produced between two parallel plates by a source of radium C of carefully tested purity have been performed by an accurate galvanometer method. From the results a transformation constant

has been assigned to radium C corresponding to a half-value period of 19·72±·04 minutes.

Similar measurements with radium active deposit have enabled a value to be estimated for the period of radium B between 26·7 and 26·8 minutes, which is the limit of accuracy of the experimental data.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 23 , Issue 2 , April 1926 , pp. 150 - 154
Copyright
Copyright © Cambridge Philosophical Society 1926

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References

* Lerch, F. v., Ann. der Phys. vol. 20, 2, pp. 345–54 (06, 1906).CrossRefGoogle Scholar

† Cf. Rutherford, , Radioactive Substances and their Radiations, p. 498.Google Scholar

* Lerch, F. v., loc. cit.Google Scholar

† Mme Curie, Radioactivité, vol. 2, p. 322 (1910).Google Scholar

* Lawson, and Hess, , Wien. Ber. 2 A, 127, pp. 626–7 (1918).Google Scholar