Abstract
ACCORDING to Fermi's theory1 for the emission of -particles, and its modification by Konopinski and Uhlenbeck2, a nucleus can, instead of emitting a positron, absorb an electron from the K-shell, thus giving rise to the emission of the K-irradiation from the element formed by the transformation. The ratio of the probabilities F for the emission of a positron and FK for the absorption of a K-electron has been calculated by Møller3 and by Mercier4; for scandium (Z = 21), the value for FK/F varies from 0.1 to 5 according to the assumptions made in the theory.
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References
Fermi, Z. Phys., 88, 161 (1934).
Konopinski and Uhlenbeck, Phys. Rev., 48, 7 (1935).
Møller, Phys. Rev., 51, 84 (1937).
Mercier, C.R. Acad. Sci., 207, 1117 (1937).
Williams and Nuttall, Phil. Mag., 2, 1109 (1926).
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JACOBSEN, J. Positrons from Radio-Scandium. Nature 139, 879–880 (1937). https://doi.org/10.1038/139879a0
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DOI: https://doi.org/10.1038/139879a0
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