Abstract
SOME experiments have recently been made to test whether the radio-activity of radium is influenced by the continuous bombardment to which it is subjected by its own radiations. In an article in this Journal on radium (April 30, 1903) Prof. J. J. Thomson suggested that the radio-activity of radium may possibly depend upon its degree of concentration, and that a given quantity of radium, diffused throughout a mass of pitchblende, may be less than when concentrated in a small mass. In order to test this point, measurements of the radio-activity of radium bromide were made when in the solid state and when diffused throughout the mass of a solution more than a thousand times the volume occupied by the radium compound.
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RUTHERFORD, E. Does the Radio-activity of Radium depend upon its Concentration?. Nature 69, 222 (1904). https://doi.org/10.1038/069222c0
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DOI: https://doi.org/10.1038/069222c0
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