Journal
JOURNAL OF CRYSTAL GROWTH
Volume 311, Issue 14, Pages 3692-3696Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2009.06.010
Keywords
Single crystal growth; Yttrium compounds; Scintillator materials
Funding
- National Natural Science Foundation of China [60607015, 60878041]
- Technical Innovation Project of Shanghai Institute of Ceramics
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In this work, Ce:YAG crystal with the size of phi 4 in was successfully grown by the TGT method. The optical and scintillation properties of as-grown Ce:YAG crystals were investigated. Three obvious absorption bands at 223, 340 and 460 nm and two weak color-center absorption bands at 296 and 370 nm are observed in as-grown Ce:YAG crystal. Fluorescence with an emission peak at 398 nm is observed due to the color centers, and absorption bands of the color centers can be eliminated by annealing in O-2 or H-2 atmosphere at 1673 K for 24 h. Yellow-green fluorescence centered at 530 nm is found when the crystal was excited at 460 nm and the 530 nm excitation spectrum shows two peaks at 340 and 460 nm. X-ray fluorescence spectrum of as-grown crystal shows three emission peaks at 300, 360 and 530 nm. An average light output of 1360 phe/MeV and a single exponential decay with the decay time constant of 62.97 ns are found in as-grown Ce:YAG crystal. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
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