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Thermoluminescence response of Ge-doped SiO2 fibres to electrons, X- and gamma -radiation

机译:掺Ge的SiO2纤维对电子,X射线和γ射线的热致发光响应

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摘要

For doses from 10 cGy to 80 Gy, we investigate the thermoluminescence (TL) response of tailor-made Gedoped SiO2 fibres for accelerated electrons (6, 12 and 20 MeV), megavoltage X-rays (6, 10 MV) and 1.25 MeV gamma-rays, delivered by a linear accelerator (LINAC) and a Co-60 irradiator respectively. Fibres of various dimensions were fabricated, obtained with doping concentrations from 6% to 10% Ge. The fibres are observed to provide a linear response with radiation dose, an overall reproducibility of 1-5%, and inappreciable dependence on energy, field-size and angular variation. For fibres exposed to 6 MV X-rays, the response increases with core size, the 6% Ge-doped fibres providing the greatest TL yield. The fibres exhibit uniformity of response and provide the basis of a promising TL, system for radiotherapy applications, offering high spatial resolution and sensitivity. (C) 2016 Elsevier Ltd. All rights reserved.
机译:对于10 cGy至80 Gy的剂量,我们研究了量身定制的Gedoped SiO2纤维对加速电子(6、12和20 MeV),兆伏X射线(6、10 MV)和1.25 MeVγ的热致发光(TL)响应。射线,分别由线性加速器(LINAC)和Co-60辐照器传递。制备了各种尺寸的纤维,掺杂浓度为6%至10%Ge。观察到这些纤维在辐射剂量下具有线性响应,总重现性为1-5%,并且对能量,场大小和角度变化的依赖性不大。对于暴露于6 MV X射线的光纤,响应随纤芯尺寸的增加而增加,掺杂6%Ge的光纤可提供最大的TL产量。这些纤维表现出均匀的响应,并为放射疗法应用提供了有前途的TL系统的基础,并提供了高空间分辨率和灵敏度。 (C)2016 Elsevier Ltd.保留所有权利。

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