The use of polymethylmethacrylate (PMMA)-based plastic optical fibre as an intrinsic real-time gamma dosimeter is investigated. The radiation-induced attenuation of the fibres is monitored in situ during the course of irradiation. The PMMA fibre exhibited a linear radiation- induced attenuation response at various wavelengths for a dose range of 50 Gy to 50 kGy. The sensitivity, ranging from 0.4 dBm−1 kGy−1 to 0.03 dBm−1 kGy−1, is wavelength dependent, with high sensitivity at the lower wavelengths.
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O’Keeffe et al. (2007) studied this question.
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