Thermoluminescence characterization of the Cu(Tb,Tm)-12CaO-7AL2O3 compounds obtained by combustion synthesis

• Characterization of the gamma sensor radiation Tb,Tm-Cu-C12A7.
• The majority of the sample can be a candidate for dosimetric application.
• Thermoluminescent results with excellent reproducibility at 240 °C and 320 °C.
• Linear response between 5 × 10−3 Gy and 10 Gy.
• Tm-Cu-C12A7 showed the best response for 5 mGy remaining linear near to 100 Gy.

The thermoluminescence (TL) properties of dode-calcium hepta-aluminate (Ca12Al14O33) enabled by 12CaO-7Al2O3 doped with rare earth and transitions metals ions have been studied and their suitability for radiation dosimetry applications is discussed. It was observed that this calcium aluminate phase doped with Tm-Cu at concentration of 0.1 mol% is a good candidate for dosimetric applications since it presents well-defined single peak observed at 240 °C and 320 °C and a linear response to gamma radiation dose from 5 × 10−3 Gy up to 100 Gy.