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Ag-doped phosphate glass with high weathering resistance for RPL dosimeter
Radiation Measurements ( IF 2 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.radmeas.2020.106492
Masaru Iwao , Hironori Takase , Daiki Shiratori , Daisuke Nakauchi , Takumi Kato , Noriaki Kawaguchi , Takayuki Yanagida

Abstract Ag-doped phosphate glass employed in the commercial dosimeter named FD-7 is used globally as one of the most reliable dosimeter materials. The luminescence phenomenon is well known as radiophotoluminescence (RPL). In this work, a new RPL glass material was developed for dosimeters that are used under high humidity conditions. The glass material that contains Ag2O as an activation center was produced by the melt-quenching method. The radiation properties and the optimal amount of Ag2O concentration required for achieving the best performance of the glass were evaluated using the RPL read-out system employing the photon counting method. On exposure to UV laser light radiation, the new RPL glass developed in this work emitted light of an approximate wavelength of 650 nm after radiation exposure, and the RPL intensity was proportional to the exposed dose. In addition, the glass material exhibited high reusability owing to the repeated operation of irradiation and reset. On conducting the weathering resistance test for a long duration, it was found that the new RPL glass exhibited the same RPL intensity and appearance as its initial values.

中文翻译:

RPL剂量计用高耐候性掺银磷酸盐玻璃

摘要 FD-7 商用剂量计采用的掺银磷酸盐玻璃是全球最可靠的剂量计材料之一。这种发光现象被称为放射光致发光 (RPL)。在这项工作中,为在高湿度条件下使用的剂量计开发了一种新的 RPL 玻璃材料。以Ag2O为活化中心的玻璃材料是通过熔融淬火法生产的。使用采用光子计数方法的 RPL 读出系统评估辐射特性和实现玻璃最佳性能所需的最佳 Ag2O 浓度。在暴露于紫外线激光辐射时,这项工作中开发的新型 RPL 玻璃在辐射暴露后发出大约 650 nm 波长的光,RPL 强度与暴露剂量成正比。此外,由于辐照和复位的重复操作,玻璃材料表现出很高的可重复使用性。经过长时间的耐候性测试,发现新的RPL玻璃表现出与其初始值相同的RPL强度和外观。
更新日期:2021-01-01
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