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The Radioactive Isotope of Potassium

1937; American Institute of Physics; Volume: 51; Issue: 3 Linguagem: Inglês

10.1103/physrev.51.178

1536-6065

W. R. Smythe, A. Hemmendinger,

Nuclear physics research studies

By means of a high intensity mass spectrometer we have separated the three isotopes of potassium. Measurements of the radioactivity of the isotopic samples indicate that ${\mathrm{K}}^{40}$ is radioactive. Comparison of the beta-particle emission from the isotopic samples and from KCl shows that ${\mathrm{K}}^{40}$ is responsible for both of the known beta-ray bands.