Abstract
Pure silica optical flat fibers (FF) have been proposed as the basis for a novel radiation sensor by the measurement of the thermoluminescence (TL) produced. In this paper the TL performance of the FFs were studied. Using a linear accelerator (LINAC) delivering doses in the range 0.2–10.0Gy, the TL dosimetric glow curves of the FFs were studied with respect to 6MeV electron and 6MV photon beams. When exposed to 6MeV electron irradiation, the pure silica FFs displayed a supralinear response starting from 2Gy up to 10.0Gy. While for 6MV photon irradiation, the FFs shows linear characteristic (f(D)=1) nearly up to 2Gy. The TL intensity (Im) of the main peak of FFs is 1.5 times higher for 6MeV electron beams than for 6MV photon beams. The maximum peak temperature (Tm) it is not affected by the type of irradiation used at the same dose while the maximum TL intensity (Im) was found to be dependent on the type of radiation used. Overall results indicate that the pure silica FFs can be used as radiation sensors in the high-dose therapy dosimetry.
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