Defect interactions and TL behaviour in thoria

The phenomenon of thermoluminescence has been frequently employed to obtain information concerning the defects in ionic solids. Present paper reports the results of an investigation on thermoluminescence behaviour of sintered thoria samples with respect to bulk density, sintering atmosphere and the radiation dose.TL glow curves have peaks around 100°, 146°, 215° and 266°C with 215°C as the most intense one. Intensity as well as peak resolution improved with density. All the peaks are found to saturate at about the same γ-radiation dose. Emission centres are assigned to be associated with the variable valence transition metal impurities unintentionally incorporated in ThO2 lattice.

B. D. Sharma

Papers

Studies on Thermoluminescence Property of Thoria Ceramics