Improved thermoluminescence and kinetic parameters of new strontium/copper co-doped lithium borate glass system

摘要

We report the modified thermoluminescence (TL) response of a new melt-quench synthesized strontium (Sr) doped lithium borate (LBSr) glass system co-doped with copper (Cu). Both Sr (0.5-2.5 mol%) and Cu (0.005-0.1 mol%) concentrations are varied to determine the optimum TL, properties by exposing them to 6 and 10 MeV electrons irradiations. A single broad TL peak with the maximum peak temperature around 180-220 degrees C is evidenced. Glass sample with 2 mol% of Sr and 0.01 mol% of Cu content revealed the optimum TL response in addition to superior linearity in the dose range of 0.5-4 Gy. The dose dependent minimum detectable dose, fading, and reproducibility are determined. Samples displayed higher sensitivity to 10 MeV electron irradiations than to 6 MeV. Furthermore, this new composition showed easy annealing, excellent reproducibility, minimal fading and obeyed second order kinetics. These attractive features make the achieved glass system prospective for radiation dosimeter fabrication.