The present study aims to develop a thermoluminescence (TL) material for dosimeter that might potentially surpass the performance of passive dosimeters that are currently available. The study focuses on the essential TL characteristics of biochar that is rich in carbon. The main thermoluminescence (TL) dosimetric properties of commercially available biochar under exposure to X-ray photon beams from Linac at doses ranging from 2 Gy to 20 Gy have been examined. These properties include dose response, sensitivity, TL glow curve, energy dependency, and fading. It has been demonstrated that the biochar provides an excellent linear response in the dose range under study and sensitive at lower dose. The biochar sample demonstrated great reproducibility, with a standard variation of less than 3%. Furthermore, a fading study was conducted and a minimum rate of fading for ambient light and dark room circumstances was discovered. The dose-dependent microstructural degradation of biochar is confirmed by SEM/EDX analysis. The structural changes caused by the radiation doses are being monitored using Raman spectra and X-ray diffraction (XRD). The kinetic parameters analysis also confirms the structural alteration brought by photon irradiation. As a result, biochar demonstrates the significant potential to be used in dosimetric applications.

中文翻译：

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用于剂量学应用的 2-20 Gy 光子剂量中生物炭的热释光和结构表征


本研究旨在开发一种用于剂量计的热释光 （TL） 材料，该材料的性能可能会超过目前可用的被动剂量计。该研究侧重于富含碳的生物炭的基本 TL 特性。已经检查了市售生物炭在暴露于来自直线加速器的 X 射线光子束（剂量范围为 2 Gy）至 20 Gy 下的主要热释光 （TL） 剂量学特性。这些特性包括剂量反应、敏感性、TL 辉光曲线、能量依赖性和衰落。已经证明，生物炭在所研究的剂量范围内提供出色的线性响应，并且在较低剂量下敏感。生物炭样品表现出很好的重现性，标准品差异小于 3%。此外，进行了一项衰落研究，发现了环境光和暗室环境的最小衰落率。通过 SEM/EDX 分析证实了生物炭的剂量依赖性微观结构降解。使用拉曼光谱和 X 射线衍射 （XRD） 监测由辐射剂量引起的结构变化。动力学参数分析也证实了光子照射带来的结构变化。因此，生物炭显示出在剂量学应用中的巨大潜力。