Possible Existence of a Neutron

  title={Possible Existence of a Neutron},
  author={J. Chadwick},
  • J. Chadwick
  • Published 1932
  • Chemistry
  • Nature
  • IT has been shown by Bothe and others that beryllium when bombarded by α-particles of polonium emits a radiation of great penetrating power, which has an absorption coefficient in lead of about 0.3 (cm.)−1. Recently Mme. Curie-Joliot and M. Joliot found, when measuring the ionisation produced by this beryllium radiation in a vessel with a thin window, that the ionisation increased when matter containing hydrogen was placed in front of the window. The effect appeared to be due to the ejection of… CONTINUE READING
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