Timing characteristics of the scintillation response of Gd3Al2Ga3O12:Ce and Gd3Al2.6Ga2.4O12:Ce single crystal scintillators
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Author list: Sakthong O., Chewpraditkul W., Kamada K., Yoshikawa A., Szczesniak T., Grodzicka M., Sibczynski P., Moszynski M.
Publisher: Elsevier
Publication year: 2016
Journal: Radiation Measurements (1350-4487)
Volume number: 87
Start page: 24
End page: 28
Number of pages: 5
ISSN: 1350-4487
eISSN: 1879-0925
Languages: English-Great Britain (EN-GB)
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Abstract
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. © 2016 Elsevier Ltd. All rights reserved.
Keywords
Gd3Al2.6Ga2.4O12:Ce, Scintillation decay
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