Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published January 15, 1958 | public
Journal Article Open

Beta-gamma circular polarization correlation experiments


A circular polarization analyzer for γ rays is described. Measurements on circular polarization of bremsstrahlung due to β particles from P32 and Tm170 agree with previous and concurrent measurements and, together with Co60 circular polarization correlation studies, establish a check on the calculated calibration curve of the analyzer. We have studied the β-γ circular polarization correlation in the following allowed j-j transitions: Na24, Sc44, Sc46, V48, and Co58. The result for Sc46 indicates the presence of a strong interference between Gamow-Teller and Fermi couplings. The β interaction, therefore, should contain a combination of S and T, or (and) V and A, interactions with small or no phase difference between the interaction constants. If one assumes maximum interference, our experiments give information on the ratio of Gamow-Teller to Fermi interaction. The once-forbidden transition Au198 gives the maximum possible asymmetry. All results are in agreement with the 2-component neutrino theory and the assumption of V, A or alternatively S, T, P interaction.

Additional Information

©1958 The American Physical Society. Received 25 September 1957. The authors are very much indebted to Dr. B. Stech for many helpful discussions. They are also indebted to Professor R. P. Feynman, Professor M. Gell-Mann, Professor J. W. M. DuMond, Dr. K. Alder, Dr. T. B. Novey, and Dr. A. Winther for their continuous interest in this work. The contribution of Mr. H. Henrikson in designing the analyzer magnet is greatly appreciated.


Files (961.4 kB)
Name Size Download all
961.4 kB Preview Download

Additional details

August 21, 2023
October 13, 2023