Ghomeishi Mostafa, Mahdiraji G Amouzad, Adikan F R Mahamd, Ung N M, Bradley D A
Integrated Lightwave Research Group, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Clinical Oncology Unit, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Sci Rep. 2015 Aug 28;5:13309. doi: 10.1038/srep13309.
With interest in the potential of optical fibres as the basis of next-generation thermoluminescence dosimeters (TLDs), the development of suitable forms of material and their fabrication has become a fast-growing endeavour. Present study focuses on three types of Ge-doped optical fibres with different structural arrangements and/or shapes, namely conventional cylindrical fibre, capillary fibre, and flat fibre, all fabricated using the same optical fibre preform. For doses from 0.5 to 8 Gy, obtained at electron and photon energies, standard thermoluminescence (TL) characteristics of the optical fibres have been the subject of detailed investigation. The results show that in collapsing the capillary fibre into a flat shape, the TL yield is increased by a factor of 5.5, the yield being also some 3.2 times greater than that of the conventional cylindrical fibre fabricated from the same perform. This suggests a means of production of suitably sensitive TLD for in-vivo dosimeter applications. Addressing the associated defects generating luminescence from each of the optical fibres, the study encompasses analysis of the TL glow curves, with computerized glow curve deconvolution (CGCD) and 2(nd) order kinetics.
随着人们对光纤作为下一代热释光剂量计（TLD）基础的潜力产生兴趣，合适材料形式的开发及其制造已成为一项快速发展的工作。目前的研究集中在三种具有不同结构排列和/或形状的掺锗光纤上，即传统圆柱形光纤、毛细管光纤和平板光纤，所有这些光纤均使用相同的光纤预制棒制造。对于在电子和光子能量下获得的0.5至8 Gy的剂量，光纤的标准热释光（TL）特性一直是详细研究的主题。结果表明，将毛细管光纤折叠成扁平形状时，TL产额提高了5.5倍，该产额也比由相同预制棒制造的传统圆柱形光纤约高3.2倍。这为体内剂量计应用生产合适灵敏度的TLD提供了一种方法。针对每种光纤产生发光的相关缺陷，该研究包括通过计算机化发光曲线反卷积（CGCD）和二阶动力学对TL发光曲线进行分析。
