Abstract
The existence of multiple disintegration produced by cosmic rays in photographic emulsion has been recorded by Perkins11 and by Occhialini and Powell2. These multiple disintegrations, recorded at high altitudes, were attributed to slow mesons and resulted in the emission of protons and α-particles. This phenomenon of multiple disintegration by the capture of a slow meson was also noted at sea-level by Evans and Griffiths3.
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