Velocity of Gamma Rays from a Moving Source

T. A. Filippas and J. G. Fox
Phys. Rev. 135, B1071 – Published 24 August 1964
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Abstract

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+pπ0+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 cv. The results were in complete disagreement with this assumption.

  • Received 17 July 1963

DOI:https://doi.org/10.1103/PhysRev.135.B1071

©1964 American Physical Society

Authors & Affiliations

T. A. Filippas and J. G. Fox

  • Carnegie Institute of Technology, Pittsburgh, Pennsylvania

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Issue

Vol. 135, Iss. 4B — August 1964

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