Influence of background exposure on detection and determination limits for a TL dosimetry system based on LiF:Mg,Cu,P(GR-200A).
Thermoluminescence dosemeters are widely used to monitor personal doses. For these low dose range applications, it is important to determine the detection limit L(D) and the determination limit L(Q) 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 L(D) was compared with the recording level and the investigation level. A systematic error can occur in the occupational dose evaluation when the detection limit L(D) is more than the recording level. It was found that the L(D) of the dosimetric system-based LiF:Mg,Cu,P(GR-200A) was less than the recording level for exposure time tau > or = 10 days considering an annual dose limit of 1 mSv for the public recommended in ICRP Publication 60.
Tang
K Y
KY
Solid Dosimetric Detector and Method Laboratory, Beijing, PR China. Tang@chinaDML.com
Liu
B X
BX
Zhu
H Y
HY
Wang
Y C
YC
Shen
W X
WX
D000388:Air / Q000032:analysis; D003300:Copper; D005459:Fluorides; D018020:Lithium Compounds; D008274:Magnesium; D010758:Phosphorus; D011834:Radiation Monitoring / Q000379:methods*; D012680:Sensitivity and Specificity; D013819:Thermoluminescent Dosimetry / Q000379:methods*
D018020:Lithium Compounds; C027651:lithium fluoride; D010758:Phosphorus; D003300:Copper; D008274:Magnesium; D005459:Fluorides