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Radiation Protection Dosimetry 28:127-129 (1989)
© 1989 Oxford University Press
How Should the Individual Dose Equivalent be Measured in High Energy Photon Fields?
In recent years radiation protection photon dosimetry in the energy range around 6 MeV has gained increasing importance. While for radiotherapy the principles of photon dosimetry in this energy range were elaborated long ago, some new aspects emerge in the case of radiation protection and in particular, of individual monitoring. In tissue-equivalent materials with a density of 1 g.cm-3, electrons with an energy of several MeV have a range substantially greater than the depth of 10 mm recommended as reference depth in the definitions of the operational quantities for penetrating radiation. This means that the recommended depth is located in the so-called build-up region, i.e. the value of H*(10) and H'(10) strongly depends on the number and energy of electrons travelling with the photon beam. Considering these problems, various concepts can be developed for radiation protection dosimetry.
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