摘要
The results of a series of experiments on 3-photon annihilation of positrons and electrons, including the energy-angular correlation, angular distribution, energy spectrum and linear polarization of the annihilation photons, the method of measuring the intensities of 3-photon annihilation, and the upper limit of axion production in the triplet positronium decay, are reported.
The results of a series of experiments on 3-photon annihilation of positrons and electrons, including the energy-angular correlation, angular distribution, energy spectrum and linear polarization of the annihilation photons, the method of measuring the intensities of 3-photon annihilation, and the upper limit of axion production in the triplet positronium decay, are reported.
