V. V. Baranov, A. V. Berestov, B. A. Martsynkevich, E. A. Rudak, A. S. Talat
Laboratory of Nuclear Spectroscopy, Institute of Physics, Academy of Sciences of Belarus, F. Scoriny Ave., 70, Minsk, 220072, Belarus
Using a high-efficiency spectrometer of delayed coincidences, a number of experiments on determination of oscillation periods at positronium annihilation in different magnetic fields have been performed. Magnetic filed H < 1 kG was produced by a special electromagnetic system, the magnetic field in homogeneity within the target of fine-dispersion oxide SiO2 D B/B did not exceed 0.5%. The energy of superfine interaction of positronium determined by means of time spectra processing is in agreement with accurate measurements of this quantity in other experiments. The possibilities for improving the PsSR method for measuring the frequency of superfine splitting to an accuracy of ~10-6 are discussed.