Document Type : Research
Authors
Department of Physics, Payame Noor University, P.O.BOX: 19395-3697, Tehran, Iran
Abstract
In this study SrZrO3:xEu3+(x=0.1-0.5 mol%) nanophosphor was prepared by celf-combustion sol-gel method with citric acid as fuel at 350 °C. The results of X-ray diffraction (XRD) indicated the optimum temperature to form a single-phase of nanophosphors with perovskite crystal structure was 900 °C. Surface morphology of the sample were characterized by field-emission electron microscopy (FE-SEM). In order to evaluate the quantitative analysis of available elements of the energy dispersive X-ray analysis (EDXA) connected to the SEM device was used. In order to investigate the thermoluminescence (TL) properties, at first the samples were heated at 500 °C for one hour and then irradiated with X-ray for different content of Eu impurity. The maximum intensity of thermoluminescence was obtained for the SrZrO3:xEu3+ sample with x=0.3 mol%. The Sr0.097Eu0.003ZrO3 sample was irradiated with X-ray over a period of 30 s to 5 min. As the irradiation time increases, the number of charge carriers’ increases, which results in an increase in the intensity of thermoluminescence. Linearity and reproducibility were checked for this sample, which can be a suitable option for dosimetry due to the significant stability and linearity of the thermoluminescence response. Kinetic parameters such as; activation energy, frequency factor and kinetic order were also calculated for Sr0.097Eu0.003ZrO3 dosimeter.
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