Budzanowski M, Olko P, Kopeć R, Obryk B, Dzikiewicz-Sapiecha H, Siwicki R
Institute of Nuclear Physics Polish Academy of Sciences (IFJ), ul. Radzikowskiego 152, 31-342 Kraków, Poland.
Radiat Prot Dosimetry. 2007;125(1-4):213-6. doi: 10.1093/rpd/ncl125. Epub 2006 Oct 12.
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 degrees, 30 degrees and 60 degrees. 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.
放射成像胶片、热释光（TL）和光激发光（OSL）。对于放射成像和OSL方法，区分静态照射（例如意外或故意留在辐射场中）和动态照射几乎可以常规进行，但对于热释光探测器来说仍然没有解决。这项工作的主要目的是开发一种方法，用于识别标准热释光探测器在辐射防护典型剂量下的静态照射。为此，开发了一种配备电荷耦合器件（CCD）相机的新型热释光剂量仪，以测量二维信号图，而不仅仅是测量发射的总光量（标准的基于光电倍增管的热释光剂量仪就是这样做的）。将直径4.5毫米、厚度0.9毫米的标准MCP-N（LiF:Mg,Cu,P）热释光片安装在带有特殊非均匀滤光片的标准拉多斯热释光个人剂量计中，并以0度、30度和60度三个角度静态暴露于33keV X射线束下。在CCD相机读数器中读取探测器，并收集二维图像。对这些CCD图像的分析能够识别静态照射情况，并在一定程度上识别20毫希弗剂量水平下的入射角。
