Kazakis Nikolaos A, Tsirliganis Nestor C
Laboratory of Archaeometry and Physicochemical Measurements, R.C. 'Athena', P.O. Box 159, Kimmeria University Campus, 67100, Xanthi, Greece.
Appl Radiat Isot. 2019 Dec;154:108899. doi: 10.1016/j.apradiso.2019.108899. Epub 2019 Sep 20.
The present work explores the luminescence behavior of animal bones and more specifically, chicken bones, using OSL in order to investigate whether they can be used for the dose assessment in the case of an accident or as dosimeters at the post-sterilization dosimetry of foods. Results indicate that the OSL sensitivity is rather low and the lower detection limit is ~18 Gy eliminating the possibility of using bones as emergency dosimeter. However, the OSL dose response is linear for doses up to ~1.0 kGy, while response over the entire dose range, up to several kGy, can be fitted with an exponential saturation curve. When bones are kept in dark, half of the initial OSL signal is lost seven days after irradiation, with no further loss for longer time periods up to two months post-irradiation. Since bones are heat-sensitive and exhibit sensitization, a dose recovery test was also conducted using the SARHS protocol in order to investigate if the protocol is capable of calculating the sterilization/accidental dose of irradiated chicken/poultry. The "unknown" doses were successfully recovered even when fading was considered. Considering the fact that bones are not directly exposed to light (protected by the skin and the flesh) or to high temperatures, it seems that they could be used at retrospective dosimetry and the identification of irradiated food products containing bone (food post-sterilization dosimetry).
本研究利用光释光（OSL）技术探索动物骨骼，尤其是鸡骨的发光行为，以调查在事故情况下它们是否可用于剂量评估，或作为食品辐照后剂量测定的剂量计。结果表明，OSL灵敏度相当低，检测下限约为18 Gy，排除了将骨骼用作应急剂量计的可能性。然而，对于高达约1.0 kGy的剂量，OSL剂量响应呈线性，而在高达数kGy的整个剂量范围内的响应可用指数饱和曲线拟合。当骨骼保存在黑暗中时，辐照后7天初始OSL信号损失一半，在长达辐照后两个月的更长时间段内没有进一步损失。由于骨骼对热敏感且表现出敏化现象，还使用SARHS方案进行了剂量恢复试验，以研究该方案是否能够计算辐照鸡/家禽的杀菌/事故剂量。即使考虑到信号衰减，“未知”剂量也能成功恢复。鉴于骨骼不会直接暴露于光（受皮肤和肌肉保护）或高温下，似乎它们可用于回顾性剂量测定以及识别含骨辐照食品（食品辐照后剂量测定）。
