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Optical and scintillation properties of Dy3+:Y3Al5O12 and undoped Y3Al5O12 crystals grown in reduction atmosphere.
- Source :
- Physica Status Solidi (C); Dec2012, Vol. 9 Issue 12, p2255-2258, 4p
- Publication Year :
- 2012
-
Abstract
- Optical and scintillation properties of a 1.0-mol% Dy-doped yttrium aluminium garnet (YAG) grown under N<subscript>2</subscript> atmosphere and undoped YAG crystals were investigated. Both crystals were grown by the Czochralski process. The one of the undoped YAG crystal was grown in an Ar + H<subscript>2</subscript> (97:3) reducing atmosphere. Absorption peaks at 352 nm and 366 nm observed in 1.0-mol% Dy-doped YAG originated from 4f-4f transition of Dy<superscript>3+</superscript>. In addition, the crystal showed sharp emission lines at near 482 nm and 584 nm under 352 nm UV and alpha-ray excitation. The light output of Dy-doped YAG was estimated to be approximately 20,000 photons/(5.5-MeV alpha ray, <superscript>241</superscript>Am). The scintillation decay time constants for Dy-doped YAG crystal was around 400 ns and 40 ns. Undoped YAG crystals grown under Ar + H<subscript>2</subscript>(97:3) atmosphere showed absorption and excitation peak at 370 nm. A 400-nm emission peak was observed under 370-nm excitation. The light output of the crystal was also estimated to be 50,000 photons/(5.5-MeV alpha ray). The scintillation decay time constants of the crystal were around 370 ns and 50 ns. (© 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18626351
- Volume :
- 9
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Physica Status Solidi (C)
- Publication Type :
- Academic Journal
- Accession number :
- 84362671
- Full Text :
- https://doi.org/10.1002/pssc.201200325