Phys. Rev. 59, 223–228 (1941)Variation of the Rate of Decay of Mesotrons with MomentumReceived 13 December 1940; published in the issue dated February 1941 In order to determine the dependence of the probability of decay on momentum, mesotrons with range between 196 and 311 g/cm2 of lead and mesotrons with range larger than 311 g/cm2 of lead were investigated separately. The softer group of mesotrons was found to disintegrate at a rate about three times faster than the more penetrating group, in agreement with the theoretical predictions based on the relativity change in rate of a moving clock. A new value of the proper lifetime of mesotrons of (2.4±0.3)×10-6 sec. is determined, based upon measurements with particles with momentum of approximately 5×108 ev/c. © 1941 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRev.59.223
DOI:
10.1103/PhysRev.59.223
PACS:
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