Abstract
IN their first communication on induced radioactivity, Curie and Joliot1 reported that a radioactive isotope of nitrogen was formed from boron by bombardment with -rays according to the scheme: The period was about 14 minutes and they carried out chemical tests which helped to identify the radioactive body. We2 also investigated this reaction and found a period of about 14 minutes. It was shown by Cockcroft, Gilbert and Walton3 that this isotope of nitrogen could be formed from carbon by bombardment with either protons or deutons, but that the period in this case was about 11 minutes. This latter result has been confirmed by several observers. If this difference in the periods could be maintained, it would suggest a number of interesting possibilities. It has, for example, been used as an argument in favour of the existence of the negative proton.
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References
NATURE, 133, 201; 1934.
NATURE, 133, 530; 1934.
NATURE, 133, 328; 1934.
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ELLIS, C., HENDERSON, W. The Period of Radionitrogen. Nature 135, 429 (1935). https://doi.org/10.1038/135429a0
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DOI: https://doi.org/10.1038/135429a0
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