The applicability of the ISO slab phantom as calibration phantom for the new ICRU report 95 quantity personal dose should be legitimated by simulations and measurements of backscatter factors on the ISO slab phantom and, comparatively, on a human-like Alderson Rando phantom. An ionization chamber was used to determine backscatter factors for standardized X-ray spectra in the energy range of 16-250 keV and for gamma radiation of 137Cs (662 keV) and 60Co (1250 keV). For the validation of measurement results on the ISO slab, the results were compared with those obtained by means of Monte Carlo simulations using MCNP 6.2. Since the deviations of the backscatter factors on the ISO slab from those on the Alderson Rando were within ±5%, it could be concluded that it is not necessary to develop a new calibration phantom for the assessment of personal dose.
© The Author(s) 2023. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.