Velocity of Gamma Rays from a Moving Source
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-+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.
- Publication:
-
Physical Review
- Pub Date:
- August 1964
- DOI:
- 10.1103/PhysRev.135.B1071
- Bibcode:
- 1964PhRv..135.1071F