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

Add time:09/09/2019    Source:sciencedirect.com

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 °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.

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