DESIGNING COMPOSITE MATERIALS BASED ON FINELY DISPERSED IRON-CONTAINING SUBSTANCES FOR SCREENING IONIZING RADIATION
DOI:
https://doi.org/10.26906/SUNZ.2020.2.110Keywords:
ionizing radiation, composite material, iron ore concentrate, shielding efficiencyAbstract
Based on an analysis of the scattering mechanisms of ionizing electromagnetic radiation and the dependence of radiation attenuation on the index number of the element and its density, it is concluded that it can be shielded by materials containing iron. The foundations of designing a composite metal-polymer material are proposed for reducing the intensity of x-ray and gamma radiation. It is shown that a change in the ionizing radiation absorption with a change in the radiation wavelength occurs nonmonotonically. Therefore, for the design of the material, it is necessary to find out the preferred wavelengths (frequencies) of radiation that require shielding. It has been established that for effective screening of radiation there is a critical concentration of metal particles in the polymer matrix. This occurs at the threshold of the flow of electric current when the content of the shielding substance is 11-12% (by weight). This is consistent with the electrodynamic ratios of continuous media. When designing a material using iron ore concentrate, its various properties should be taken into account, depending on the manufacturer. The design of the protective material should be preceded by laboratory studies to determine the overwhelming fraction of iron ore particles by the size and content of iron and its compounds in the feedstock.Downloads
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