TY - JOUR
T1 - Timing characteristics of the scintillation response of Gd3Al2Ga3O12:Ce and Gd3Al2.6Ga2.4O12:Ce single crystal scintillators
AU - Sakthong, Ongsa
AU - Chewpraditkul, Weerapong
AU - Kamada, Kei
AU - Yoshikawa, Akira
AU - Szczesniak, Tomasz
AU - Grodzicka, Martyna
AU - Sibczynski, Pawel
AU - Moszynski, Marek
N1 - Funding Information:
This work is partially supported by the National Research Council of Thailand (NRCT project no. 2559A30602099 ) and King Mongkut's University of Technology Thonburi . The funding program for next generation world-leading researchers JSPS is also gratefully acknowledged. M. Nikl is acknowledged for useful discussions.
Publisher Copyright:
© 2016 Elsevier Ltd. All rights reserved.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - The timing characteristics of scintillation response of Czochralski-grown Gd3Al2Ga3O12:Ce and Gd3Al2.6Ga2.4O12:Ce single crystals were compared. The photoelectron yield, scintillation decay times, and coincidence time resolution were measured. At 662 keV γ-rays, the photoelectron yield of 6200 phe MeV-1 obtained for Gd3Al2Ga3O12:Ce is higher than that of 4970 phe MeV-1 obtained for Gd3Al2.6Ga2.4O12:Ce, while an inferior energy resolution of the former (7.2% vs. 5.6%) is observed. Scintillation decays are approximated by sum of exponentials with the dominant fast component decay time and its relative intensity of 89 ns (73%) for Gd3Al2Ga3O12:Ce and 136 ns (69%) for Gd3Al2.6Ga2.4O12:Ce. The coincidence time resolution obtained for Gd3Al2Ga3O12:Ce is superior than that of Gd3Al2.6Ga2.4O12:Ce. The normalized time resolution was also discussed in terms of a number of photoelectrons and decay characteristics of the light pulse.
AB - The timing characteristics of scintillation response of Czochralski-grown Gd3Al2Ga3O12:Ce and Gd3Al2.6Ga2.4O12:Ce single crystals were compared. The photoelectron yield, scintillation decay times, and coincidence time resolution were measured. At 662 keV γ-rays, the photoelectron yield of 6200 phe MeV-1 obtained for Gd3Al2Ga3O12:Ce is higher than that of 4970 phe MeV-1 obtained for Gd3Al2.6Ga2.4O12:Ce, while an inferior energy resolution of the former (7.2% vs. 5.6%) is observed. Scintillation decays are approximated by sum of exponentials with the dominant fast component decay time and its relative intensity of 89 ns (73%) for Gd3Al2Ga3O12:Ce and 136 ns (69%) for Gd3Al2.6Ga2.4O12:Ce. The coincidence time resolution obtained for Gd3Al2Ga3O12:Ce is superior than that of Gd3Al2.6Ga2.4O12:Ce. The normalized time resolution was also discussed in terms of a number of photoelectrons and decay characteristics of the light pulse.
KW - Coincidence time resolution
KW - Energy resolution
KW - GdAlGaO:Ce
KW - GdAlGaO:Ce
KW - Scintillation decay
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U2 - 10.1016/j.radmeas.2016.02.018
DO - 10.1016/j.radmeas.2016.02.018
M3 - Article
AN - SCOPUS:84958818740
SN - 1350-4487
VL - 87
SP - 24
EP - 28
JO - Radiation Measurements
JF - Radiation Measurements
ER -