Further Measurements of the Mesotron Lifetime

Phys. Rev. 61, 675 – Published 1 June 1942
Bruno Rossi, Kenneth Greisen, Joyce C. Stearns, Darol K. Froman, and Phillipp G. Koontz


The average ranges before decay of two monoenergetic mesotron groups have been measured. Within the statistical errors, the ranges are found to be in the same ratio as the average effective momenta, as theoretically predicted. From the two above measurements, and with a mesotron mass μ=108 ev/c2, one obtains the values τ0=(2.8±0.3)×10-6 and τ0=(2.9±0.7)×10-6 second for the proper lifetime of mesotrons, in excellent agreement with previous measurements by Rossi and Hall.

DOI: http://dx.doi.org/10.1103/PhysRev.61.675

  • Received 23 March 1942
  • Published in the issue dated June 1942

© 1942 The American Physical Society

Authors & Affiliations

Bruno Rossi and Kenneth Greisen

  • Cornell University, Ithaca, New York

Joyce C. Stearns and Darol K. Froman

  • University of Denver, Denver, Colorado

Phillipp G. Koontz

  • Colorado State College, Fort Collins, Colorado

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