Luminescence and light yield of (Gd2Y)(Ga3Al2)O12:Pr3+ single crystal scintillators
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Author list: Lertloypanyachai P., Pathumrangsan N., Sreebunpeng K., Pattanaboonmee N., Chewpraditkul W., Yoshikawa A., Kamada K., Nikl M.
Publisher: Elsevier
Publication year: 2017
Journal: Journal of Crystal Growth (0022-0248)
Volume number: 468
Start page: 369
End page: 372
Number of pages: 4
ISSN: 0022-0248
eISSN: 1873-5002
Languages: English-Great Britain (EN-GB)
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Abstract
Praseodymium-doped (Gd2Y)(Ga3Al2)O12 (GYGAG: Pr) single crystals are grown by the micro-pulling down method with different Pr concentrations. The energy transfer process between Pr3+ and Gd3+ is investigated by photoluminescence excitation (PLE) and emission (PL) spectra measurements. Photoelectron yield measurements are carried out using photomultiplier. At 662 keV γ-rays, photoelectron yield of 2520 phe/MeV obtained for the GYGAG: Pr (0.01%) sample is larger than that of 1810 phe/MeV obtained for BGO crystal. Light yield degradation for the GYGAG: Pr scintillators is presumably due to the energy transfer from 5d state of Pr3+ to 4f state of Gd3+ together with the concentration quenching in the Gd3+-sublattice. © 2016 Elsevier B.V.
Keywords
A1.Photoelectron yield, A1.Scintillation, B1.(Gd2Y)(Ga3Al2)O12:Pr
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