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A method for selecting three-photon positronium-annihilation events with a multidetector coincidence spectrometer |
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| Authors: | S. K. Andrukhovich N. Antovich A. V. Berestov P. Vukotich A. A. Gurinovich O. N. Metelitsa A. A. Khrushchinskii |
| Affiliation: | (1) Stepanov Institute of Physics, Belarussian Academy of Sciences, pr. Skoriny 68, 220072 Minsk, Belarus;(2) Nature-Mathematical Department, University of Montenegro, Stinski Put, 81000 Podgoritsa, Monteregro;(3) Institute of Nuclear Problems, Belarussian State University, ul. Bobruiskaya 11, 220050 Minsk, Belarus |
| Abstract: | A method for event selection takes into account all features of orthopositronium-atom annihilation. The spectral and angular distributions of positronium three-photon decay was investigated with the 4π-spectrometer ARGUS. The filtration program for the events corresponding to the three-photon positronium decay was developed, and positronium 3γ-annihilation was simulated by the Monte Carlo method. The measured spectra agree well with the simulation. The technique developed will be used to test the quantum electrodynamics of bound state. |
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