Radiations from High-Energy Positrons Incident on a Beryllium Target
- 1 February 1961
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 121 (3) , 866-870
- https://doi.org/10.1103/physrev.121.866
Abstract
The energy spread and yields of nearly monoenergetic photons of various energies produced by the annihilation in flight of relativistic positrons have been experimentally determined using a 6-in.-long by 5-in.-diam NaI (Tl) crystal spectrometer. Photon lines with an energy spread of a few percent are reported. Yields of positrons and monoenergetic photons in the energy range from 2 Mev to 14 Mev have been measured. The bremsstrahlung spectra from 8.5-Mev positrons and electrons were compared and the yields and spectral distributions were found to agree within the experimental error.Keywords
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