Wahib Norfadira, Zulkepely Nurul Najua, Mat Nawi Siti Nurasiah, Amin Yusoff Mohd, Ling Yap Seong, Abdul Sani Siti Fairus, Maah Mohd Jamil, Bradley D A
Department of Physics, Faculty of Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Department of Physics, Faculty of Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Appl Radiat Isot. 2015 Nov;105:158-162. doi: 10.1016/j.apradiso.2015.08.025. Epub 2015 Aug 19.
Over the past decade and more, considerable interest has been shown in the thermoluminescence (TL) properties of silica-based single-mode optical fibres, in particular investigating potential ionising radiation dosimetry applications. Herein, study has been made of TL glow curve, dose response, reproducibility and fading of 6mol% Ge-doped silica, fabricated in-house and produced in the form of cylindrical fibres. Three different pairings of doped-core and silica cladding diameters were produced: (40, 241)µm, (80, 483)µm and (100, 604)µm. The TL results were compared against that of TLD-100, one of the most sensitive commercially available LiF-based TL media. For all three pairings of diameters, closely similar TL glow curve were obtained, formed of a single peaked structure with a maximum TL yield located between the temperatures 250 and 310°C. The TL yield of the fibres were linear over the range of doses investigated, from 1Gy up to 10Gy, their dose response exceeding that of TLD-100, the samples also being found to be reusable, without evidence of degradation.
在过去十多年里，人们对基于二氧化硅的单模光纤的热释光（TL）特性表现出了浓厚兴趣，特别是在研究潜在的电离辐射剂量测定应用方面。在此，对内部制造的、呈圆柱形光纤形式的6mol%锗掺杂二氧化硅的热释光发光曲线、剂量响应、再现性和衰退进行了研究。制作了三种不同的掺杂芯和二氧化硅包层直径组合：(40, 241)µm、(80, 483)µm和(100, 604)µm。将热释光结果与TLD - 100（一种最灵敏的市售基于LiF的热释光介质）的结果进行了比较。对于所有三种直径组合，都获得了非常相似的热释光发光曲线，其由一个单峰结构组成，最大热释光产额位于250至310°C之间的温度范围内。在研究的剂量范围（从1Gy到10Gy）内，光纤的热释光产额呈线性，其剂量响应超过了TLD - 100，还发现这些样品可重复使用，且没有降解迹象。
