For the investigation granite samples of UCS Dneprovskiy deposit made in the shape of parallelepiped with the size mm and mass (2,82,9) g were chosen. The samples were irradiated in the field of bremsstrahlung of the electron accelerators at two stages: first – at the value of upper boundary of the photon energetic spectrum Eγmax=10 MeV up to the value of the absorbed dose (AD ...