The Neutrino

  title={The Neutrino},
  author={Frederick Reines and Clyde L. Cowan},
In the 1920s, physicists were confused: the phenomenon of β decay (in which an electron is emitted from the atomic nucleus) seemed to violate conservation laws. The energy spectrum of the electrons, or β-rays, is continuous: if energy is conserved, another, variable, amount of energy must somehow leave the system. In 1927, Ellis and Wooster [Nature119, 563–564 (1927)] tried — and failed — to capture and measure that missing energy. By 1933, Pauli had devised an explanation in terms of another… 
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