Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia.
College of Medicine, University of Imam Abdulrahman Bin Faisal, Dammam, Saudi Arabia.
PLoS One. 2020 Dec 30;15(12):e0241550. doi: 10.1371/journal.pone.0241550. eCollection 2020.
For x- and gamma- irradiations delivering entrance doses from 2- up to 1000 Gy to commercial 1.0 mm thick borosilicate glass microscope slides, study has been made of their thermoluminescence yield. With an effective atomic number of 10.6 (approximating bone equivalence), photon energy dependency is apparent in the low x-ray energy range, with interplay between the photoelectric effect and attenuation. As an example, over the examined dose range, at 120 kVp the photon sensitivity has been found to be some 5× that of 60Co gamma irradiations, also with repeatability to within ~1%. The glow-curves, taking the form of a single prominent broad peak, have been deconvolved yielding at best fit a total of five peaks, the associated activation energies and frequency factors also being obtained. The results indicate borosilicate glass slides to offer promising performance as a low-cost passive radiation dosimeter, with utility for both radiotherapy and industrial applications.
对商用 1.0 毫米厚硼硅酸盐显微镜载玻片进行了从 2 到 1000Gy 的 X 和伽马辐照，研究了它们的热释光产额。有效原子序数为 10.6（近似于骨等效），在低 X 射线能量范围内，光电效应和衰减之间存在明显的相互作用，表现出光子能量依赖性。例如，在所研究的剂量范围内，在 120kVp 时，光子灵敏度大约是 60Co 伽马辐照的 5 倍，并且重复性也在 1%左右。热释光曲线呈单一显著宽峰形式，通过反卷积可以得到最佳拟合，总共得到五个峰，还获得了相关的激活能和频率因子。结果表明，硼硅酸盐玻璃载玻片作为一种低成本的无源辐射剂量计具有很大的应用潜力，可用于放射治疗和工业应用。
