Optical and scintillation properties of Ce.sup.3+./sup.-doped YGd.sub.2./sub.Al.sub.5-x./sub.Ga.sub.x./sub.O.sub.12./sub. (x=2,3,4) single crystal scintillators

0458432 - FZÚ 2017 RIV NL eng J - Journal Article
Chewpraditkul, Wa. - Brůža, P. - Pánek, D. - Pattanaboonmee, N. - Wantong, K. - Chewpraditkul, W. - Babin, Vladimir - Bartosiewicz, Karol - Kamada, K. - Yoshikawa, A. - Nikl, Martin
Optical and scintillation properties of Ce³⁺-doped YGd₂Al_5-xGa_xO₁₂ (x=2,3,4) single crystal scintillators.
Journal of Luminescence. Roč. 169, Jan (2016), s. 43-50. ISSN 0022-2313. E-ISSN 1872-7883
R&D Projects: GA ČR GAP204/12/0805; GA MŠMT(CZ) LH14266
EU Projects: European Commission(XE) 316906 - LUMINET
Institutional support: RVO:68378271
Keywords : YGd₂Al_5-xGa_xO₁₂:Ce * light yield * luminescence * scintillation
Subject RIV: BH - Optics, Masers, Lasers
Impact factor: 2.686, year: 2016

The optical and scintillation properties of Ce3+-doped YGd2Al5−xGaxO12 (x=2,3,4) single crystals were investigated. With increasing Ga content in the garnet host, the 5d1 absorption and emission bands shift toward higher energy due to the decrease in the crystal field splitting of the 5d levels. Temperature dependences of absorption and emission spectra and of photoluminescence decays of both prompt and delayed components were measured. Light yield (LY) and its dependence on an amplifier shaping time were measured under excitation with γ-rays. High LY value of 38,000 photons/MeV was obtained for a YGd2Al2Ga3O12:Ce sample. Scintillation decay was measured with an extended dynamical and temporal scale under the nanosecond-pulsed soft X-ray excitation. The relative content of the fastest component in the scintillation response increases with increasing Ga content.
Permanent Link: http://hdl.handle.net/11104/0258715