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Radiation Protection Dosimetry 28:63-67 (1989)
© 1989 Oxford University Press

The Calibration of Photon Personal Dosemeters

D.T. Bartlett, T.M. Francis and P.J. Dimbylow

Calculations have been performed of the dose equivalent distributions inside, and the energy and angle spectral distributions of the backscattered radiation field at and near the surface, of some phantoms of interest for the calibration of personal dosemeters for the measurement of incident photon radiation. The phantoms were of ICRU 4-element tissue as 30 cm cube, 20, 30 and 50 cm diameter sphere; of polymethylmethacrylate (PMMA) as 30 cm cube; of MS20 as 30 cm cube and 30 cm diameter sphere. The backscatter field calculations were made for normally incident photons only in the case of cube phantoms, but for angles of incidence up to 95 oC for sphere phantoms. The results which were obtained for incident photon energies of 15, 25, 50, 75, 100, 150 and 662 keV, have been interpolated to some values of the ISO Narrow Series of reference fluorescence X radiation and folded with calculated spectra to obtain values for the ISO Narrow Series of reference filtered X radiation.


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