High-energy gamma quanta in primary cosmic rays

Scintillation and Cerenkov counters aboard the Proton-2 and Cosmos-208 satellites were used to measure the intensity of gamma rays of energies exceeding 30 MeV in primary cosmic rays. Data on the spectral shape of gamma rays at energies exceeding 10 to the 7th eV tends to disprove the hypothesis that the main contribution to gamma intensity is pi-meson decay. The supposition that the inverse Compton effect of relativistic electrons on background photons is the major determinant of gamma intensity accords better with experimental data.