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Thermoluminescence in MgB4O7:Pr, Dy dosimetry powder synthesized by solution combustion synthesis method
Journal of Luminescence ( IF 3.6 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.jlumin.2020.117761
A. Ozdemir , V. Guckan , V. Altunal , K. Kurt , Z. Yegingil

Abstract This study aimed to investigate the dosimetric properties of magnesium tetraborate (MgB4O7) doped with praseodymium (Pr3+) and dysprosium (Dy3+) using the thermoluminescence (TL) technique. In this study, the dopant concentrations of Pr0.01-2% wt and Dy0.01-20% wt were induced into MgB4O7 with Solution Combustion Synthesis (SCS) method. Their effect was enhanced insensitivity of TL when used with the optimal dopant concentrations Pr0.5% wt and Dy5% wt incorporated in the lattice. The structural characterizations of MgB4O7:Pr0.5%wt,Dy5% wt phosphor was studied using X-ray Diffraction (XRD), Scanning Electron Microscope (SEM) analysis techniques. X-ray Luminescence (XL) spectra of several of these phosphors with various dopants as used here, were also determined. The TL glow curve of the MgB4O7:Pr0.5% wt, Dy 5% wt phosphor consists of four TL peaks at ∼ 85, ∼180, ∼265, ∼320 °C when recorded with a heating rate of 2 °C/s without preheating. Some dosimetric properties of the MgB4O7:Pr, Dy phosphor, such as dose-response, reusability and fading in dark were studied under 90Sr/90Y beta-ray radiation. The TL output was found as linear with dose from 0.1 to 100 Gy. The good reusability, by 2% standard deviation, was up to 20 experimental cycles. After 24 h, the maximum heights of TL glow peaks at 180 and 320 °C were about 7 and 4% less than that of the readouts at half an hour later the irradiation. The kinetic parameters using various heating rates (VHR), Tm-Tstop assisted extended initial rise method (IRM) and computerized glow curve deconvolution (CGCD) techniques were obtained and compared. Experimental results suggest that Pr3+ and Dy3+ doped MgB4O7:Pr0.5% wt,Dy5% wt shows suitable dosimetric properties for TL dosimetry.

中文翻译:

溶液燃烧合成法合成的MgB4O7:Pr、Dy剂量学粉末中的热释光

摘要 本研究旨在使用热释光 (TL) 技术研究掺杂镨 (Pr3+) 和镝 (Dy3+) 的四硼酸镁 (MgB4O7) 的剂量学特性。在本研究中,使用溶液燃烧合成 (SCS) 方法将 Pr0.01-2% wt 和 Dy0.01-20% wt 的掺杂剂浓度诱导到 MgB4O7 中。当与晶格中掺入的最佳掺杂剂浓度 Pr0.5% wt 和 Dy5% wt 一起使用时,它们的效果是增强了 TL 的不敏感性。使用 X 射线衍射 (XRD)、扫描电子显微镜 (SEM) 分析技术研究了 MgB4O7:Pr0.5%wt,Dy5%wt 磷光体的结构表征。还测定了此处使用的具有各种掺杂剂的几种这些磷光体的 X 射线发光 (XL) 光谱。MgB4O7:Pr0.5% wt 的 TL 辉光曲线,Dy 5% wt 磷光体由四个 TL 峰组成,分别位于~85、~180、~265、~320°C,当在没有预热的情况下以 2°C/s 的加热速率记录时。在 90Sr/90Y β 射线辐射下研究了 MgB4O7:Pr、Dy 荧光粉的一些剂量学特性,例如剂量响应、可重复使用性和黑暗中的褪色。发现 TL 输出与 0.1 至 100 Gy 的剂量呈线性关系。良好的可重用性,标准偏差为 2%,最多可达 20 个实验周期。24 小时后,180 和 320 °C 的 TL 辉光峰的最大高度比照射半小时后的读数低约 7% 和 4%。获得并比较了使用各种加热速率 (VHR)、Tm-Tstop 辅助扩展初始上升方法 (IRM) 和计算机辉光曲线解卷积 (CGCD) 技术的动力学参数。
更新日期:2021-02-01
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