Possible Existence of a Neutron
@article{Chadwick1932PossibleEO,
title={Possible Existence of a Neutron},
author={J. Chadwick},
journal={Nature},
year={1932},
volume={129},
pages={312-312}
}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… Expand