A major disadvantage of dose reconstruction by means of thermoluminescence (TL) is the fact that during readout of any TL material exposed to ionizing radiation (i.e., during measuring the glow curve), the radiation-induced signal gets lost. Application of the photo-transferred thermoluminescence phenomenon (PTTL) may offer a solution to this problem. In PTTL, the residual signal that is not destroyed by conventional TL readout (because it comes from deeper electron traps) can be readout through simultaneous stimulation by UV light and heating, allowing to obtain information about the absorbed dose in a second run. The present paper describes the application of PTTL for emergency dose assessment. For this, MTS-N thermoluminescent detectors (LiF: Mg, Ti) were exposed using a high-energy Clinac 2300 medical linear accelerator to doses of 100 mGy, 300 mGy, 500 mGy, 700 mGy and 1000 mGy. Irradiation with UV radiation allowed the determination of the optimal heating time of 3 h, while the optimal temperature was identified to be 70 °C. The results obtained demonstrated the usefulness of the PTTL method for emergency dose assessment. The efficiency of the PTTL method was determined as 19%. Finally it was found that the detector background after UV exposure should not be underestimated during routine dose measurements.

中文翻译：

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在紧急剂量评估的情况下发生光传递的热致发光现象。

通过热致发光（TL）重建剂量的主要缺点是以下事实：在读出暴露于电离辐射的任何TL材料期间（即，在测量辉光曲线期间），辐射诱导的信号会丢失。光传输热致发光现象（PTTL）的应用可以为该问题提供解决方案。在PTTL中，可以通过同时受到紫外线和加热的刺激来读出未被常规TL读数破坏的残留信号（因为它来自更深的电子陷阱），从而可以在第二轮中获得有关吸收剂量的信息。本文介绍了PTTL在紧急剂量评估中的应用。为此，使用高能Clinac 2300医用线性加速器将MTS-N热发光探测器（LiF：Mg，Ti）暴露于100 mGy的剂量下，300 mGy，500 mGy，700 mGy和1000 mGy。用紫外线辐射可以确定3 h的最佳加热时间，而确定的最佳温度为70°C。获得的结果证明了PTTL方法在紧急剂量评估中的有用性。PTTL方法的效率确定为19％。最终发现，在常规剂量测量期间，不应低估暴露于紫外线后的检测器背景。