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Published December 15, 1957 | public
Journal Article Open

Positron polarization in a mirror transition


The positron polarization in the mirror transition N13, a predominantly Fermi transition, has been measured by detecting the circular polarization of the annihilation-in-flight quanta. The results indicate complete polarization of the positrons parallel to their momentum, showing that Fermi coupling contributes significantly to the positron polarization in the same sense as the Gamow-Teller coupling.

Additional Information

©1957 The American Physical Society. Received 29 August 1957. The authors are much indebted to Mr. D. Kohler for assistance with the source preparation, and to Professor J. W. M. DuMond, Professor W. A. Fowler, Professor M. Gell-Mann, Professor C. C. Lauristan, and Dr. A. H. Wapstra for their advice and interest in this work. One of us (B. S.) wishes to thank the Deutsche Forschungsgemeinschaft for a grant.


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August 21, 2023
October 13, 2023