Department of Geology, R.T.M. Nagpur University, Nagpur, India.
Central Region, Geological Survey of India, Nagpur, India.
Luminescence. 2021 Mar;36(2):460-471. doi: 10.1002/bio.3964. Epub 2020 Nov 20.
Dosimetry is a technique that quantitatively measures the ionizing radiation absorbed by matter. The present study was conducted on the barites from a mine at Dongargaon in Central India. Morphological and structural analysis of proposed sample was carried out using X-ray diffraction and standard error of the mean. Thermal analysis and chemical composition of the proposed sample were carried out using thermogravimetric analysis and differential thermal analysis, and electron probe microanalysis. Thermoluminescence (TL) studies on a natural barite sample were performed using a Nucleonix TL1009I TL reader following sample irradiation with γ-rays generated from a Co irradiation source. A broad TL glow curve was observed after TL study that was then deconvoluted using TLanal deconvolution software. Trapping parameters from the sample such as activation energy (E), order of kinetics (b), and frequency factor (s) were calculated using Chen's peak shape method, the initial rise method, and Ilich's method. The results indicated that the natural barite sample could be used in high-dose TL dosimetric applications in various fields.
剂量学是一种定量测量物质吸收电离辐射的技术。本研究针对来自印度中部 Dongargaon 矿区的重晶石进行了研究。使用 X 射线衍射和平均值标准误差对提出的样品进行了形态和结构分析。使用热重分析和差示热分析以及电子探针微分析对提出的样品进行了热分析和化学成分分析。使用 Nucleonix TL1009I TL 读取器对天然重晶石样品进行了热释光 (TL) 研究，该读取器对来自 Co 辐照源的 γ 射线进行了辐照。在 TL 研究后观察到宽的 TL 发光曲线，然后使用 TLanal 解卷积软件对其进行解卷积。使用 Chen 的峰形法、初始上升法和 Ilich 法从样品中计算了捕获参数，如激活能 (E)、动力学级数 (b) 和频率因子 (s)。结果表明，天然重晶石样品可用于各个领域的高剂量 TL 剂量测定应用。
