Effect of Ag Doping on Thermoluminescence Properties and Radiation Dosimetry Performance of MgB₄O₇

This study investigates the thermoluminescence (TL) properties of silver (Ag)-doped magnesium tetraborate (MgB4O7, MBO) for radiation dosimetry applications. MBO, known for its tissue-equivalent properties, was synthesized via the solid-state reaction method with Ag doping concentrations of 0.1 wt%, 0.5 wt% and 1.0 wt%. Comprehensive TL experiments were conducted to evaluate key dosimetric properties such as dose response, reusability, fading and heating rate. Additionally, kinetic parameters were derived using the glow curve decomposition (CGCD) and variable heating rate (VHR) methods. The TL glow curves demonstrated that Ag doping significantly enhances the TL signal intensity, particularly at higher doping levels, indicating an impact on trap density and energy release mechanisms. The 1.0 wt% Ag-doped MBO sample exhibited high TL signal intensity and optimal trap stability, making it suitable for applications requiring high sensitivity. Dose-response experiments confirmed the linearity of the TL signal up to high radiation doses (4.6 kGy), while cycling tests validated the material's good reusability and thermal stability. Overall, these findings demonstrate that Ag doping, especially at 1.0 wt%, is an effective approach to enhance the dosimetric performance of MBO, strengthening its potential as a robust candidate for advanced radiation dosimetry systems.