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The applicability of the PTTL dose re-analysis method to the Harshaw LiF:Mg,Cu,P material
M Moscovitch1, L Benevides, A Romanyukha
1Department of Radiation Medicine, Georgetown University Medical Center, 3970 Reservoir Road NW, Washington, DC 20057, USA. moscovim@georgetown.edu
Abstract:
The phototransferred thermoluminescence (PTTL) technique is applied to the Harshaw LiF:Mg,Cu,P material. It is demonstrated that using 254-nm UV light, dose levels as low as 0.2 mGy can be re-estimated. The PTTL efficiency was found to be ∼ 6 % in the dose range of 0.2 mGy-1 Gy, and it appears to be dose-independent. This implies that a simple calibration factor could be applied to the PTTL data for the re-estimation of dose levels. It was demonstrated that with a proper choice of the TL readout parameters, and the UV-light irradiation conditions, dose levels that are relevant to personal or environmental dosimetry can be re-estimated.
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