Cloud-Chamber Observations of the New Unstable Cosmic-Ray Particles

Phys. Rev. 78, 290 – Published 1 May 1950
A. J. Seriff, R. B. Leighton, C. Hsiao, E. W. Cowan, and C. D. Anderson

Abstract

Thirty-four "forked tracks" similar to two previously reported by Rochester and Butler have been observed in 11,000 cloud-chamber photographs of cosmic-ray penetrating showers, confirming their conclusion that new unstable neutral and charged particles exist. The lifetime of the neutral particles is found to be about 3×10-10 sec., and some information as to the nature of the decay products is given.

DOI: http://dx.doi.org/10.1103/PhysRev.78.290

  • Received 6 March 1950
  • Published in the issue dated May 1950

© 1950 The American Physical Society

Authors & Affiliations

A. J. Seriff, R. B. Leighton, C. Hsiao, E. W. Cowan, and C. D. Anderson

  • California Institute of Technology, Pasadena, California

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