Thermoluminescence studies on γ-irradiated Mn:Li_2B_4O_7 single crystals

摘要

Manganese doped Li_2B_4O_7 (LTB) crystals were grown by Czochralski technique and various kinetic parameter of thermoluminescence (TL) were measured. Crystals were irradiated with different y-dose using Co60 source. Thermoluminescence curves were recorded at various heating rates. Trap depth and frequency factor were calculated. Fading of Mn: Li_2B_4O_7 was found only ～5%-6% in 6 months. Thermoluminescence intensity of Mn: Li_2B_4O_7 was found highly sensitive to the mass of the material, and it varies abruptly with mass change of +/- 1 mg, irradiated with the same dose. Therefore, the accuracy in mass is important parameter for thermoluminescence dosimeter badge.