Phys. Rev. 135, B1071–B1075 (1964)Velocity of Gamma Rays from a Moving SourceReceived 17 July 1963; revised 1 June 1964; published in the issue dated August 1964 Serious difficulties from extinction are shown to exist in the interpretation of past experiments on γ rays from moving sources. We have measured the relative speed of the two γ rays emitted forward and backward by a π0 meson decaying in flight. The velocity of the neutral pions, which were produced in the reaction π-+p→π0+n, was v=0.2c. We have compared our results with what would have been expected, taking account of extinction, on the assumption that the initial photon velocities were c+v and c-v. The results were in complete disagreement with this assumption. © 1964 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRev.135.B1071
DOI:
10.1103/PhysRev.135.B1071
PACS:
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