Optical, scintillation and thermally stimulated luminescence properties of Ce-doped yttrium-aluminum-indium garnet

We have investigated the photoluminescence (PL), scintillation and thermally stimulated luminescence (TSL) properties of 1mol% Ce-doped Y-3(AlXIn1-X)(5)O-12 (X = 0-1; Ce: YAING). These samples showed strong and broad PL emission by Ce3+ ion appeared in the spectral range from 480 to 620 nm. The PL decay profiles can be represented by a first-order exponential function with the decay time ranging 39-62 ns. Furthermore, the scintillation spectra showed similar features with those observed in PL. The scintillation decay time profiles were approximated by second or third order exponential decay functions, and we observed 26-61 ns component due to Ce3+ emission. The X-ray induced afterglow levels of Ce :YAING were worse than that of Ce :Y3Al5O12. The pulse height spectra of Ce: Y-3(Al0.26In0.74) O-5(12) showed a clear photoabsorption peak, and that of the scintillation light yield was around 6,700 photons/MeV. In TSL glow curves, Ce: YAING show the glow peak at around 110 degrees C. (C) 2017 The Japan Society of Applied Physics.