In this study, we investigate thermoluminescence (TL) of calcium aluminate undoped and doped with three rare earth elements at five different concentrations, synthesized by the combustion method, which can be designed for relevant applications with suitable doping of activators. From the XRD data, we determine the phase, structure and particle size, using Scherrer's equation. Investigations on the morphology and functional groups of the prepared samples are carried out by using the techniques of field emission scanning electron microscope (FE-SEM) and Fourier transform infrared (FTIR) spectroscopy. The samples are exposed to γ-ray doses of 10 Gy to investigate their optimum concentrations, the effects of doping with different rare earth elements and kinetic parameters. The TL glow curves are deconvoluted using the TLanal program, and TL trapping parameters, viz. activation energy (E), frequency factor (s) and order of kinetics (b) of trapped charges, are obtained. We theoretically evaluate lifetimes (τ) of the charges in the traps present in these phosphors using kinetic parameters. The phosphor CaAl₂O₄:Sm³⁺ has the most intense stable TL peaks and the trap charge-lifetime in the range of years, which make it an eligible candidate for dosimetric applications. We also observe photoluminescence spectra of doped calcium aluminate at the optimum concentration exhibiting maximum TL intensity.

在这项研究中，我们研究了未掺杂和掺杂五种不同浓度的三种稀土元素的铝酸钙的热释光 (TL)，通过燃烧法合成，可以设计用于适当掺杂活化剂的相关应用。根据 XRD 数据，我们使用 Scherrer 方程确定相、结构和粒度。通过使用场发射扫描电子显微镜（FE-SEM）和傅里叶变换红外（FTIR）光谱技术对制备的样品的形貌和官能团进行研究。样品暴露于 10 Gy 的 γ 射线剂量，以研究它们的最佳浓度、掺杂不同稀土元素的影响和动力学参数。TL辉光曲线使用TLanal程序去卷积，和 TL 捕获参数，即。活化能 （E )、频率因子 ( s ) 和俘获电荷的动力学顺序 ( b ) 被获得。我们使用动力学参数从理论上评估了这些磷光体中存在的陷阱中电荷的寿命 ( τ )。磷光体 CaAl ₂ O ₄ :Sm ³⁺具有最强烈的稳定 TL 峰和数年范围内的陷阱电荷寿命，这使其成为剂量测定应用的合格候选者。我们还观察了显示最大 TL 强度的最佳浓度下掺杂铝酸钙的光致发光光谱。