Impact of titanium dopant concentration on structure, optical band gap and thermoluminescence (TL) properties of LiF:Mg,Ti

Abstract

In this study, lithium fluoride doped with magnesium and titanium (LiF:Mg,Ti) powders were synthesized chemically and where used as thermoluminescence dosimeter (TLD) applications. In order to improve thermoluminescence (TL) properties of powders, different percentages of titanium were used in the structures. Different methods were used to characterization of the synthesized powders, such as X-ray diffraction (XRD) method, SEM, FTIR and UV–Visible spectroscopy. Band gap energy of the powders was obtained about 5.4–5.7 eV. It was observed that by increasing the amount of titanium up to a certain amount, the number of electron traps and as a result, the intensity of TL light increases. With the further increase of titanium dopant, the radiation intensity decreases, which can be due to the saturation and destruction of the structure of traps by creating excess traps. Results of this study can be important in the engineering and design of TLDs with higher TL efficiency.