Radiation resistance of structural radiation-protective composite material based on magnetite matrix

Abstract

The effect of fast electrons with energy of 0.5–6.2 MeV at a fluence of 10¹⁸ electrons/cm² and γ sources of ⁶⁰Со (Е = 1.25 МeV) at the absorbed dose of 0.1–25 MGy on the radiation-protective composites based on a magnetite matrix used for biological protection of nuclear reactors is calculated and studied experimentally. The depth of penetration of the electron beam and the nature of distribution of the absorbed dose of fast electrons on thickness of the protective composite are studied. The processes promoting change in the oxidation and coordination states of iron atoms and structural-phase and magnetic states in the composite under the influence of fast electrons and γ radiation are determined.