Abstract

LiF:Mg,Cu,P is emerging as a very interesting TL material with significant advantages over the most widely accepted material, LiF:Mg,Ti. This study aims to demonstrate that some of its characteristics such as the lack of supralinearity make it useful for radiation therapy dosimetry. It has been verified that the residual signal is lower than 1.5% after an initial dose of 1 Gy and that the energy response for several high energy photon and electron beams used in radiotherapy is within ±2.5% with respect to 60Co. A wide range of dose linearity from 0 to 10 Gy has been found for the beams considered. The influence of temperature (22(C, 45(C) during irradiation and storage is also analysed. Finally the performance of LiF:Mg,Cu,P is compared to LiF:Mg,Ti. It is shown that commercially available LiF:Mg,Cu,P is suitable for clinical applications and that some of the drawbacks reported in previous work can be overcome.

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