Abstract
RUTHERFORD AND SODDY (Phil. Mag., 1902, p. 582; 1903, p. 453 and 579) pointed out that the almost invariable presence of helium in minerals containing uranium indicated that that gas might be one of the ultimate products of the disintegration of the radio-elements. Rutherford, moreover, determined the mass of the projected particle which constitutes the “α-ray” of radium (Phil. Mag., 1903, p. 177) to be approximately twice as great as that of the hydrogen atom, an observation which points in the same direction. These α-particles are readily absorbed by solids and should accumulate in the solid salts of radium and in the radio-active minerals.
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RAMSAY, W., SODDY, F. Gases Occluded by Radium Bromide. Nature 68, 246 (1903). https://doi.org/10.1038/068246d0
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DOI: https://doi.org/10.1038/068246d0
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