Thermostimulated luminescence of Ca(Al$_{x}$Ga$_{1-x}$)$_{2}$S$_{4}$:Eu$^{2+}$ crystals

Thermoluminescence of Ca(Al$_{x}$Ga$_{1-x}$)$_{2}$S$_{4}$:Eu$^{2+}$ ($x$ = 0.1–0.3) solid solutions upon UV irradiation has been studied in the course of linear heating. It is established that the observed thermostimulated emission bands are complex, consisting of several strongly overlapped partial maxima. The activation energies, capture cross sections, frequency factors, and concentrations of trap levels responsible for these peaks are determined. The emission intensity and number of components increase with growing aluminum content $x$.