Synthesis and thermoluminescence study of Dy3+ doped ZnAl2O4 phosphor for high-dose dosimetry application
摘要
ZnAl2O4:Dy3+ sub-micron phosphor material was synthesized by co-precipitation method. Different characterization techniques, including XRD, FESEM, FTIR, TG–DTA, UV–visible spectroscopy, Photoluminescence (PL) and Thermoluminescence (TL) were used to investigate different properties of the material. Effects of doping concentration and heat treatments on the TL properties were investigated. It was observed that the ZnAl2O4:Dy3+ (0.2 M%) phosphor material exhibited its maximum TL intensity when annealed at 1600 °C. Kinetic parameters were determined by different methods, such as, Computerized Glow Curve Deconvolution (CGCD) method, Initial Rise (IR) method and Various Heating Rate (VHR) method. The phosphor showed excellent TL properties like good reusability, wide and sublinear dose response which makes it a suitable candidate for high-dose dosimetry application.