Optical and scintillation properties of Tm-doped Ca3TaGa3Si2O14 single crystals
摘要
Undoped and Tm-doped Ca3TaGa3Si2O14 (CTGS) single crystals were synthesized by the floating-zone method, and their photoluminescence (PL) and scintillation properties were investigated. The Tm-doped samples showed PL and scintillation due to 4f–4f transitions of Tm3+. The PL quantum yields of the 0.1, 0.5, 1, and 2% Tm-doped CTGS samples were, respectively, 4.2, 28.2, 27.6, and 8.3% when excited at 360 nm. The afterglow levels at 20 ms after X-ray irradiation of all the samples were 10–83 ppm. The 0.1, 0.5, and 1% Tm-doped CTGS samples, respectively, showed the light yields of 1300, 1800, and 1500 photons/MeV under γ-ray irradiation.