Abstract
THE discovery that the radioactivity of potassium is due to a minor isotopic constituent, suggests the idea that other common elements may also have radioactive isotopes present in small amounts. This line of thought induced us to investigate the properties of samarium and we found this element to be markedly radioactive.
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HEVESY, G., PAHL, M. Radioactivity of Samarium. Nature 130, 846–847 (1932). https://doi.org/10.1038/130846a0
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DOI: https://doi.org/10.1038/130846a0
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