Abstract
The measurement of radium content by the gamma-ray method involves corrections for the absorption of the radiation in the wall of the container and in the radioactive material itself. Corrections for cylindrical containers constructed of platinumiridium, gold, a gold-silver alloy and monel metal have been determined experimentally for wall thicknesses up to 2 mm. and external diameters up to 8 mm., using radium cells and absorbing tubes to simulate radium containers. Measurements of the absorption in powdered materials are described and an empirical formula representing the absorption both for the powdered materials and the metal tubes is deduced. The results provide an experimental basis for the estimation of the absorption in radium salts, and examples of their application to practical cases are given.
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