Effect of pre-readout annealing treatments on TL mechanism in tellurite glasses at therapeutic radiation doses level

► The higher sensitization for an annealing in the region 550–600°C for tellurite glasses have been measured. ► It is suggested that tellurite glass can be used at therapeutic radiation doses. ► Tellurite glasses in the form 80(TeO2)–5(TiO2)–(15 −x) (WO3)–(x) AnOm where AnOm = Nb2O5, Nd2O3, Er2O3 and x = 5 mol% have been irradiated. ► Tellurite glasses in the form 80(TeO2)–5(TiO2)–(15 −x) (WO3)–(x) AnOm where AnOm = Nb2O5, Nd2O3, Er2O3 and x = 5 mol% can be used at therapeutic radiation doses. The higher sensitization for thermal annealing on TL mechanism in the region 550–600°C for 80(TeO2)–5(TiO2)–(15−x) (WO3)–(x) AnOm where AnOm=Nb2O5, Nd2O3, Er2O3 and x=5mol% has been measured. The behavior of trap centers and luminescence centers has been investigated for tellurite glasses doped with rare earth oxides irradiated at 0.5 up to 2Gy and annealed at different temperatures in the range 350–700°C. The behavior of the three types of tellurite glasses is analyzed regarding to their kinetic parameters and luminescence emission which enhance the claim of tellurite glasses for use as TLD material at therapeutic radiation doses.