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Radiation Protection Dosimetry Advance Access originally published online on October 12, 2006
Radiation Protection Dosimetry 2007 125(1-4):213-216; doi:10.1093/rpd/ncl125
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Identification of static exposure of standard dosimetric badge with thermoluminescent detectors

M. Budzanowski1,*, P. Olko1, R. Kopec1, B. Obryk1, H. Dzikiewicz-Sapiecha2 and R. Siwicki2

1 Institute of Nuclear Physics Polish Academy of Sciences (IFJ), ul. Radzikowskiego 152 31-342 Kraków, Poland
2 Central Laboratory for Radiological Protection (CLOR) 03-194 Warszawa, Poland

*Corresponding author: maciej.budzanowski{at}ifj.edu.pl

There are three main methods used in individual monitoring: radiographic films, thermoluminescence (TL) and optically stimulated luminescence (OSL). Distinguishing between static (e.g. by leaving it accidentally or purposely in the radiation field) and dynamic exposures can be almost routinely performed for radiographic and OSL methods but is still unsolved for TL detectors. The main aim of this work is to develop a method for identifying static exposures of standard TL detectors at doses which are typical of radiation protection. For this purpose, a new TLD reader equipped with a CCD camera was developed to measure the two-dimensional signal map and not only the total light emitted (as is performed with standard photomultiplier-based TL readers). Standard MCP-N (LiF:Mg,Cu,P) TL pellets of 4.5 mm diameter and 0.9 mm thickness were installed in the standard Rados TL personal badges with special, non-uniform filters and exposed statically to 33 keV X-ray beams at three angles: 0°, 30° and 60°. The detectors were readout in the CCD camera reader and 2-D images were collected. The analysis of these CCD images allows the identification of the static exposure cases and partly the angle of incidence at a dose level of 20 mSv.


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