TY - JOUR
T1 - Luminescence properties and scintillation response in Ce3+-doped Y2Gd1Al5-xGaxO12 (x = 2, 3, 4) single crystals
AU - Chewpraditkul, Warut
AU - Pánek, Dalibor
AU - Brůža, Petr
AU - Chewpraditkul, Weerapong
AU - Wanarak, Chalerm
AU - Pattanaboonmee, Nakarin
AU - Babin, Vladimir
AU - Bartosiewicz, Karol
AU - Kamada, Kei
AU - Yoshikawa, Akira
AU - Nikl, Martin
PY - 2014/8/28
Y1 - 2014/8/28
N2 - The compositional dependence of luminescence properties and scintillation response were investigated in Ce3+-doped Y2Gd 1Al5-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 ∼38000ph/MeV was obtained for a Y 2Gd1Al3Ga2O12: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.
AB - The compositional dependence of luminescence properties and scintillation response were investigated in Ce3+-doped Y2Gd 1Al5-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 ∼38000ph/MeV was obtained for a Y 2Gd1Al3Ga2O12: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.
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U2 - 10.1063/1.4893675
DO - 10.1063/1.4893675
M3 - Article
AN - SCOPUS:84906861599
SN - 0021-8979
VL - 116
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 8
M1 - 083505
ER -