Aspects of this topic are discussed in the following places at Britannica.
...through matter for a distance equal to the Earth’s diameter, reacts with a proton or a neutron. Finally, in 1956 a team of American physicists led by Frederick Reines reported the discovery of the electron-antineutrino. In their experiments antineutrinos emitted in a nuclear reactor were allowed to react with protons to produce neutrons and positrons. The unique (and rare) energy signatures of...
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