Abstract
The investigations deal with the search for a passive dosemeter applicable to patient dosimetry in diagnostic radiology, which meets particularly the requirements of a low detection limit and an adequate energy response, as well as sufficiently high precision and reliability A thermoluminescence dosimetry (TLD) technology is reported that fits these requirements. The detector material consists of lithium fluoride co-doped with copper (LiF:Mg.Cu.P) The detectors, originating from China, are shown to exhibit high radiation sensitivity exceeding that of conventional lithium fluoride. LiF:Mg,Ti (TLD- 100), by far. Based on the new technology a detection threshold of 0. 1 μGy, precision as low as ≤1 % (1σ rel ) and strict linearity of the TL signal-dose relationship were found, for dose up to at least 1 mGy.
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