TY JOUR TI Analysis of the Bremsstrahlung Photons Flux and the Neutrons Beams during the Operation of the Medical Electron Accelerator KW radiation therapy KW bremstrahlung KW photonuclear reactions KW secondary neutrons KW activation method JO Medical Radiology and radiation safety AU Lykova, E.N. AU Zheltonozhskaya, M.V. AU Smirnov, F.Y. AU Rudnev, P.I. AU Chernyaev, A.P. AU Cheshigin, I.V. AU Yatsenko, V.N. PY 2019 IS 64 PB Federal Medical Biological Agency of Russia