DEPENDENCE OF RATE OF 13N AND 15O RADIONUCLIDES PRODUCTION IN AIR FROM THE MAXIMAL ENERGY AND THE SPECTRUM OF BREMSSTRAHLUNG

While using electron beams in physical experiments, medicine and industry their converting in bremsstrahlung takes place which leads to air radiolysis practically in all accelerating chamber (ACH). Forbidden period of an entrance to ACH at energy of accelerated electrons above 30 MeV is determined by the concentration of N-13 and O-15 in ACH air. However, now in the literature and normative documentation there is no data for concentration calculation of radioactive gases in ACH in an operational mode of accelerating setup with bremsstrahlung. By means of GEANT 4 package spectra of bremsstrahlung and neutron radiations are calculated, which are formed at interaction of an electron beam with a thick target. Also the dependence of constant rate for N-13 and O-15 radionuclides production in air are estimated at the energy of accelerated electrons from 25 up to 100 MeV. Obtained results can be used for calculation of concentration of radioactive gases in ACH and in atmospheric emissions.