Meson Decay
FEB 01, 1950
DOI: 10.1063/1.3066802
The instability of the meson that constitutes a large fraction of the cosmic radiation at sea level has been experimentally established for ten years, and the light charged decay particle that was observed provided a means of directly measuring the mean lifetime—2.2 microseconds—for the process.
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© 1950 American Institute of Physics
