Scintillation properties of Dy-doped TeO2Al2O3BaO glasses

Abstract

We investigated photoluminescence (PL) and scintillation properties of Dy-doped tellurite glasses [80TeO25Al2O3(15 1 x)BaOxDy2O3 (x = 0.10.5)]. The Dy-doped tellurite glasses were prepared by the conventional melt-quenching method. In PL, all the Dy-doped tellurite glasses showed sharp emission peaks at approximately 575, 660 and 755 nm originated from the 4f4f transition of Dy3+. The 0.5 and 1.0 % Dy-doped tellurite glasses exhibited high PL intensities under 450 nm excitation light. In scintillation, the Dy-doped tellurite glasses showed emissions peaking at approximately 485, 585 and 665 nm due to the 4f4f transitions of Dy3+, and the 1.0 % Dy-doped tellurite glass exhibited the highest scintillation intensity. Furthermore, the PL and scintillation decay time constants of the Dy-doped tellurite glasses were about 12.6367 and 30.2248 ¯s, respectively. Theses decay time constants were typical values for the 4f4f transition of Dy3+. In addition, the Dy-doped tellurite glasses showed moderate afterglow levels of about 289751 ppm, and the afterglow level of the 1.0 % Dy-doped tellurite glass (289 ppm) was almost comparable to that of a commonly used inorganic scintillator Tl-doped CsI.