LOW-ENERGY X-RAY RADIATION AFTER THE BIOLOGICAL SHIELDING OF ELECTRON ACCELERATORS

The bremsstrahlung of electrons from thick converters and its passage through concrete shielding of accelerators at different angles to the axis of the electron beam were calculated using GEANT4. Numerical estimates of the residual low-energy component of X-ray radiation after passing through the biological protection were carried out at an electron energy of up to 300 MeV. Additional reasons for the possible appearance of soft X-ray radiation after the shielding are considered. Experimental measurements of the spectral and dosimetric characteristics were performed by a silicon uncooled detector with the energy resolution of similar to 1 keV and spectral sensitivity in the range 5...150 keV. The comparison of the estimated dose (using the number of counts in Si detector) with indications of dosimeters was made.