Synthesis and thermoluminescence studies of Sr₄Al₁₄O₂₅:Eu²⁺ phosphor

Abstract

Trapping parameter, the activation energy (<i style="">E</i>), the order of kinetics (<i style="">b</i>) and the frequency factor (<i style="">s</i>), are determined for the solution combustion synthesized Sr₄Al₁₄O₂₅: Eu²⁺ phosphor using ⁶⁰Co irradiation source. The glow curve is a double peak structure with prominent peak at 487 K with shoulder at 423 K. Non-shifting <i style="">T</i>_m property is utilized for the trap parameter determination. Glow curve deconvolution (GCD) is carried out on recorded glow curves after gamma radiations. The trap depths calculated ranges between 0.5-1.36 eV. The linearity characteristic of the present phosphor and the fading experiments suggests the aptness of present phosphor towards dosimetric applications.