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OSL dosimetry with protective glasses of modern smartphones: A fiber-optic, non-destructive approach
Radiation Measurements ( IF 2 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.radmeas.2020.106382
Sergey Sholom , Stephen W.S. McKeever , Joshua R. Chandler

Abstract A non-destructive, optically stimulated luminescence (OSL) technique was tested on samples of back protective glasses from modern smartphones for possible application in post-exposure radiation triage following a radiological accident. Excitation light from a green-wavelength laser was directed to the samples using an optical fiber; the same optical fiber was used to direct the emission light from the sample to a photomultiplier tube. Excitation and emission beams were separated using a combination of a dichroic mirror, optical filters, and time resolution. It was found that all tested samples fell into two different categories. Category 1 included Gorilla Glass 3 (GG3) and Gorilla Glass 4 (GG4) samples, while Category 2 included samples from Gorilla Glass 5 (GG5) glass. The radiation sensitivity of samples from Category 1 was about one order of magnitude higher than that of Category 2 glass. Minimum detectable doses determined for the pulse OSL mode were about 1 Gy and 10 Gy for Categories 1 and 2, respectively, for samples measured immediately after irradiation. Fading of the OSL signal measured in the CW-OSL mode was ~75% and ~84% one day after irradiation and ~82% and ~88% over one week for Categories 1 and 2, respectively. It was concluded that the back glasses demonstrate a feasible line of future research for potential use as emergency OSL dosimeters, provided they were covered by an opaque cover both during and after an emergency exposure and are then analyzed within a few days following the incident.

中文翻译:

带现代智能手机防护眼镜的 OSL 剂量测定:一种光纤无损方法

摘要 在现代智能手机的背部防护眼镜样品上测试了一种非破坏性的光学受激发光 (OSL) 技术,以用于可能在发生放射性事故后的暴露后辐射分类中应用。使用光纤将来自绿色波长激光器的激发光引导至样品;使用相同的光纤将来自样品的发射光引导至光电倍增管。使用分色镜、滤光器和时间分辨率的组合来分离激发和发射光束。结果发现,所有测试样本都分为两个不同的类别。类别 1 包括大猩猩玻璃 3 (GG3) 和大猩猩玻璃 4 (GG4) 样品,而类别 2 包括来自大猩猩玻璃 5 (GG5) 玻璃的样品。1 类样品的辐射敏感性比 2 类玻璃高一个数量级。对于辐照后立即测量的样品,脉冲 OSL 模式确定的最小可检测剂量对于类别 1 和类别 2 分别约为 1 Gy 和 10 Gy。在 CW-OSL 模式下测量的 OSL 信号在辐照一天后的衰减为 ~75% 和 ~84%,对于类别 1 和 2,在一周内分别为 ~82% 和 ~88%。结论是后玻璃展示了未来研究的可行路线,可用作紧急 OSL 剂量计,前提是它们在紧急暴露期间和之后都被不透明的盖子覆盖,然后在事件发生后的几天内进行分析。对于辐照后立即测量的样品,脉冲 OSL 模式确定的最小可检测剂量对于类别 1 和类别 2 分别约为 1 Gy 和 10 Gy。在 CW-OSL 模式下测量的 OSL 信号在辐照一天后的衰减为 ~75% 和 ~84%,对于类别 1 和 2,在一周内分别为 ~82% 和 ~88%。结论是后玻璃展示了未来研究的可行路线,可用作紧急 OSL 剂量计,前提是它们在紧急暴露期间和之后都被不透明的盖子覆盖,然后在事件发生后的几天内进行分析。对于辐照后立即测量的样品,脉冲 OSL 模式确定的最小可检测剂量对于类别 1 和类别 2 分别约为 1 Gy 和 10 Gy。在 CW-OSL 模式下测量的 OSL 信号在辐照一天后的衰减为 ~75% 和 ~84%,对于类别 1 和 2,在一周内分别为 ~82% 和 ~88%。结论是后玻璃展示了未来研究的可行路线,可用作紧急 OSL 剂量计,前提是它们在紧急暴露期间和之后都被不透明的盖子覆盖,然后在事件发生后的几天内进行分析。在 CW-OSL 模式下测量的 OSL 信号在辐照一天后的衰减为 ~75% 和 ~84%,对于类别 1 和 2,在一周内分别为 ~82% 和 ~88%。结论是后玻璃展示了未来研究的可行路线,可用作紧急 OSL 剂量计,前提是它们在紧急暴露期间和之后都被不透明的盖子覆盖,然后在事件发生后的几天内进行分析。在 CW-OSL 模式下测量的 OSL 信号在辐照一天后的衰减为 ~75% 和 ~84%,对于类别 1 和 2,在一周内分别为 ~82% 和 ~88%。结论是后玻璃展示了未来研究的可行路线,可用作紧急 OSL 剂量计,前提是它们在紧急暴露期间和之后都被不透明的盖子覆盖,然后在事件发生后的几天内进行分析。
更新日期:2020-08-01
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