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Radiation Protection Dosimetry 101:187-190 (2002)
© 2002 Oxford University Press

Influence of Background Exposure on Detection and Determination Limits for a TL Dosimetry System Based on LiF:Mg,Cu,P (GR-200A)

K. Y. Tang, B. X. Liu, H. Y. Zhu, Y. C. Wang and W. X. Shen

Thermoluminescence dosemeters are widely used to monitor personal doses. For these low dose range applications, it is important to determine the detection limit LD and the determination limit LQ of the dosimetric system. The influence of background exposure on these limits for LiF:Mg,Cu,P (GR-200A) based TL dosimetry was investigated. Both the conventional analysis and the glow curve analysis methods were used to determinate these limits. The detection limit LD was compared with the recording level and the investigation level. A systematic error can occur in the occupational dose evaluation when the detection limit LD is more than the recording level. It was found that the LD of the dosimetric system-based LiF:Mg,Cu,P (GR-200A) was less than the recording level for exposure time t (10 days considering an annual dose limit of 1 mSv for public recommended in ICRP Publication 60.


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