Abstract
NEW experiments by Dr. C. D. Ellis and Mr. W. J. Henderson with radionitrogen (the first radioactive element prepared synthetically by M. and Mme. Joliot by the action of a-particles on boron) show that its half-life period is 11 minutes and not 14 minutes; it is thus identical with the half-life period of the radionitrogen obtained from carbon bombarded with protons. The difference previously believed to exist between the two types of radio-nitrogen has been adduced as proof of the existence of negatrons (negatively charged nuclei).
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Points from Foregoing Letters. Nature 135, 437 (1935). https://doi.org/10.1038/135437b0
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DOI: https://doi.org/10.1038/135437b0