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Observation of the circular polarization correlation of the positron-electron annihilation quanta

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Zeitschrift für Physik

Abstract

The circular polarization-circular polarization angular correlation of annihilation quanta has been measured unambiguously by use of two backscattering Compton polarimeters in coincidence. The interpretation of the measurement required a quantum mechanical calculation of the circular polarization detection probability for coincident annihilation quanta. This calculation showed that the most favourable geometry for detecting a circular polarization correlation is the backscattering geometry because here, in contrast to forward scattering and transmission geometries, strong perturbations by the linear polarization correlation are not present. By using the polarization efficiencyη=4.7% for a single polarimeter, which was derived from a Monte Carlo calculation, the measured effect for the circular polarization-circular polarization correlation showed good agreement with theory.

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Authors and Affiliations

  1. Institut für Strahlen- und Kernphysik der UniversitÄt Bonn, Federal Republic of Germany

    G. Schmidt & L. M. Simons

Authors
  1. G. Schmidt
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  2. L. M. Simons
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Additional information

We wish to thank Prof. E. Bodenstedt for his constant interest and kind support and Prof. J. K. Bienlein who suggested this experiment. The calculations were performed on the computer of the GMD, Bonn. The experiment was financially supported by the Bundesminister für Forschung und Technologie.

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Schmidt, G., Simons, L.M. Observation of the circular polarization correlation of the positron-electron annihilation quanta. Z. Physik 263, 387–394 (1973). https://doi.org/10.1007/BF01391987

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  • DOI: https://doi.org/10.1007/BF01391987

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