Investigation has been made of the radioluminescence dose response of Ge-doped silica flat and cylindrical fibers subjected to 6 and 10 MV photon beams. The fibers have been custom fabricated, obtaining Ge dopant concentrations of 6 and 10 mol%, subsequently cut into 20 mm lengths. Each sample has been exposed under a set of similar conditions, with use made of a fixed field size and source to surface distance (SSD). Investigation of dosimetric performance has involved radioluminescence linearity, dose-rate dependence, energy dependence, and reproducibility. Mass for mass, the 6 mol% Ge-doped samples provided the greater radioluminescence yield, with both flat and cylindrical fibers responding linearly to the absorbed dose. Further found has been that the cylindrical fibers provided a yield some 38% greater than that of the flat fibers. At 6 MV, the cylindrical fibers were also found to exhibit repeatability variation of <1%, superior to that of the flat fibers, offering strong potential for use in real-time dosimetry applications.

已经对经受 6 和 10 MV 光子束的掺锗二氧化硅扁平和圆柱形光纤的辐射发光剂量响应进行了研究。这些纤维是定制的，获得了 6 和 10 mol% 的 Ge 掺杂剂浓度，随后切成 20 毫米长。每个样品都在一组类似的条件下进行了曝光，使用了固定的视场大小和源到表面距离 (SSD)。剂量学性能的研究涉及辐射发光线性、剂量率依赖性、能量依赖性和再现性。质量对质量，6 mol% Ge 掺杂样品提供了更大的辐射发光产率，扁平和圆柱形光纤对吸收剂量呈线性响应。进一步发现，圆柱形纤维提供的产量比扁平纤维高约 38%。在 6 MV 时，