Abstract
Abstract Conventional personal dosemeters designed for measurement of H p (10) of photon exposure can approximate effective dose E (quantity of interest in radiation protection) only for situations when irradiation occurs from the front of a human body. It is known that for rear irradiation with lower energies dosemeter readout may significantly underestimate E . The aim of this study was to determine angular and energy dependences of E and estimate respective conversion coefficient from photon dosemeter readout to E for given (left chest) location of a dosemeter and based on such dependences theoretically elaborate a design of a dosemeter with uniform response in terms of E . Monte Carlo simulation was performed for different energies (50, 80, 100, 150 and 200 keV) and incidence angles (with 30° increments both for polar and azimuth angles) for a number of plausible dosemeter designs. It was demonstrated that properly designed copper filter reduces variation of conversion coefficient by a factor of four, thus allowing more certain evaluation of effective dose of occupational exposure than dosemeters of conventional design may do.
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