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

Abstract

We have investigated the photoluminescence (PL), scintillation and thermally stimulated luminescence (TSL) properties of 1 mol % Ce-doped Y3(Al X In1− X )5O12 (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:Y3(Al0.26In0.74)5O12 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 °C.

Characterizations of Ce-doped Y4Al2O9 Crystals for Scintillator Applications

“…The luminescence properties, including scintillation and storage-luminescence properties, of garnets and perovskites have been intensively studied with many different combinations of these constituent elements. (15)(16)(17)(18)(19)(20) Despite the similarities to the garnets and perovskites, fewer studies have been reported on the luminescence properties of the monoclinic crystals. As far as we are aware, the scintillation properties of Ce-doped YAM (Ce:YAM) have not been reported, and only a few groups have investigated some optical properties including photoluminescence.…”