Luminescence properties and scintillation response in Ce.sup.3+./sup.-doped Y.sub.2./sub.Gd.sub.1./sub.Al.sub.5-x./sub.Ga.sub.x./sub.O.sub.12./sub. (x = 2, 3, 4) single crystals

0432853 - FZÚ 2015 RIV US eng J - Journal Article
Chewpraditkul, Wa. - Pánek, D. - Brůža, P. - Chewpraditkul, W. - Wanarak, C. - Pattanaboonmee, N. - Babin, Vladimir - Bartosiewicz, Karol - Kamada, K. - Yoshikawa, A. - Nikl, Martin
Luminescence properties and scintillation response in Ce³⁺-doped Y₂Gd₁Al_5-xGa_xO₁₂ (x = 2, 3, 4) single crystals.
Journal of Applied Physics. Roč. 116, č. 8 (2014), "083505-1"-"083505-7". ISSN 0021-8979. E-ISSN 1089-7550
R&D Projects: GA MŠMT(CZ) LH14266
EU Projects: European Commission(XE) 316906 - F-CHROMA
Institutional support: RVO:68378271
Keywords : luminescence * scintillation * photoluminescence
Subject RIV: BH - Optics, Masers, Lasers
Impact factor: 2.183, year: 2014

The compositional dependence of luminescence properties and scintillation response were investigated in Ce3+-doped Y2Gd1Al5-xGaxO12 (x = 2, 3, 4) single crystals. The Gd3+ → Ce3+ energy transfer was evidenced by photoluminescence excitation spectra of Ce3+ emission. With increasing Ga content in the garnet host, the Ce3+ luminescence from the lowest 5d level (5d1) is shifted toward higher energy due to the decrease in the crystal field splitting of the 5d levels. Light yield (LY) and its dependence on the amplifier shaping time were measured under excitation with γ-rays. High LY value of 38 000 ph/MeV was obtained for a Y2Gd1Al3Ga2O12:Ce sample. Scintillation decay was measured with an extended dynamical and temporal scale under the nanosecond pulse soft X-ray excitation. The decrease of both LY value and relative contribution of slower decay component in the scintillation response was observed with increasing Ga content in the garnet host.
Permanent Link: http://hdl.handle.net/11104/0237206