Chronology of Milestone Events in Particle Physics - PERKINS 1947
Chronology of Milestone Events in Particle Physics


Perkins, D.H.;
Nuclear Disintegration by Meson Capture
Nature 159 (1947) 126;

Reprinted in
R. N. Cahn and G. Goldhaber, The Experimental Foundations of Particle Physics, Cambridge Univ. Press (1991) 39.

Recently, multiple nuclear disintegration "stars'', produced by cosmic radiation, have been investigated by the photographic emulsion technique. Plates coated with 50 Ilford B.1 emulsions, were exposed in aircraft for several hours at 30,000 ft. One of these disintegrations was of particular interest, for whereas all stars previously observed had been initiated by radiation not producing ionizing tracks in the emulsion, the one in question appears to be due to nuclear capture of a charged particle, presumably a slow meson. (Extracted from the introductory part of the paper.).

Accelerator COSM Detectors EMUL

Related references
See also
C. F. Powell, G. P. S. Occhialini, D. L. Liversey and L. V. Chilton, J. Sci. Instr. 23 (1946) 102;
Williams, Proc. Roy. Soc. A169 (1938) 531;

  nucleus nucleus 3H 2p cs

Particles studied
  ex, mass

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First indication of the existence of the .
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