LiF:Mg,Ti detectors show relative efficiency η for heavy charged particles significantly lower than one. It was for a long time not recognised that η varies also for electron energies and, as a consequence for photons. For LiF:Mg,Cu,P detectors measured photon energy response was named ‘anomalous’ because it differed significantly from the ratio of photon absorption coefficients. The decrease of η was explained as a microdosimetric effect due to local saturation of trapping centres around the electron track. For TLD-100 it was noticed by Horowitz that the measured photon energy response disagrees with the ratio of absorption coefficient by about 10%. It was demonstrated that a fraction of the TL signal in LiF:Mg,Ti is generated in the supralinear dose–response range, due to the high local doses generated by photon-induced tracks. Prediction of TL efficiency is particularly important in space dosimetry and in dosimetry of therapeutic beams like protons or carbon ions.

中文翻译：

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对热释光探测器的剂量响应和相对效率的微剂量理解


LiF:Mg,Ti 探测器显示重带电粒子的相对效率 η 明显低于 1。很长一段时间以来，人们都没有意识到 η 也会随着电子能量的变化而变化，从而导致光子的变化。对于 LiF:Mg,Cu,P 探测器，测量的光子能量响应被称为“异常”，因为它与光子吸收系数的比率显着不同。 η 的降低被解释为由于电子轨迹周围俘获中心的局部饱和而导致的微剂量效应。对于 TLD-100，Horowitz 注意到测量的光子能量响应与吸收系数的比率不一致约 10%。结果表明，由于光子诱导径迹产生的高局部剂量，LiF:Mg,Ti 中的一小部分 TL 信号是在超线性剂量响应范围内产生的。 TL 效率的预测在空间剂量测定和质子或碳离子等治疗束的剂量测定中尤为重要。