Luminescent properties of perovskite type GdAlO₃: Dy³⁺ obtained by co-precipitation method

In the present work synthesis and luminescent properties of gadolinium aluminate doped with activator of trivalent ion Dy³⁺ was successful achieved through the coprecipitation method. Powder X-ray diffraction (XRD) technique was employed to identify phase purity on the crystallographic structure. The luminescent properties were investigated using photoluminescence (PL), and thermoluminescence (TL) measurements. Experimental PL measurements revealed that the intensity of luminescence emission was observed with respect to the energy transfer processes between the host and the Dy³⁺. The dependence of thermoluminescence intensity of dopant concentration was investigated with varied depending on the concentration of Dy³⁺ ions. TL measurements were conducted between room temperature (RT) and 350 °C at a heating rate of 10 °C/s. A significant TL glow curve was observed consisting with two peaks centered at 150 and 260 °C under different β-dose exposures. TL response of the powders displayed good linearity in the range of 0.5-44 Gy. Currently findings confirm that gadolinium aluminate as host is a promising candidate for beta radiation studies because exhibits adequate TL dose response with a good sensitivity and linearity for beta radiation application.