Abstract
THERE seems to exist a discrepancy between the measured value of the alpha-decay half-life of natural samarium (samarium-147) and the theoretical half-life calculated from its measured alpha energy1. This may be due to the fact that in most ion-chamber measurements of samarium-147, heavy natural alpha-emitters with much higher energies have been used as standards, which leads to great difficulties because of the non-linearity of the ionization process.
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References
Segré, E., “Experimental Nuclear Physics”, 3, 140 (John Wiley and Sons, 1959).
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For a detailed report on the apparatus, see Karras, M., “On the Natural Radioactivity of Samarium” (to be published).
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Waldron, E. C., Schultz, V. A., and Kohman, T. P., Phys. Rev., 93, 254 (1954).
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KARRAS, M., NURMIA, M. Natural Radioactivity of Samarium and Neodymium. Nature 185, 601 (1960). https://doi.org/10.1038/185601a0
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DOI: https://doi.org/10.1038/185601a0
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