Effect of Ag Doping on Crystallography and TL Emissions of $${{\text{Li}}}_{2}{\text{O}}{\,-\,{\text{B}}}_{2}{{\text{O}}}_{3}$$ System

Abstract

The present study aimed to investigate pure lithium tetraborate (LTB) and silver (0.2%) doped LTB obtained via the solid-state route. XRD results revealed that the pure sample consisted of LTB crystals, while doped samples comprised lithium tetraborate (Li₂B₄O₇), lithium triborate (LiB₃O₅), and Li₂B₄O₄, with an average crystallite size of about (40 ± 2) nm. TL (UV-VIS) analysis of LTB exhibited a peak at 125 °C, while doped samples supplied additional peaks at 205 °C, 315 °C, and 380 °C. LTB showed TL (UV) peaks at 120 °C and 210 °C, whereas doped samples exhibited peaks at 120 °C, 180 °C, and 295 °C. The TL response demonstrated a linear increase within the 0.081 to 5 Gy dose interval. Experimental TL glow curves could be fitted using a general order kinetics (GOK) model. TL emission spectra of LTB revealed bands at 330 nm and 580 nm, while LTB:Ag exhibited bands at 280 nm, 300 nm, and 584 nm. The presence of Ag substantially increased the TL intensity and introduced new peaks at high temperatures.