Scintillation properties of TGG and TSAG crystals for imaging applications

Optical and scintillation properties of TGG (Tb3Ga5O12) and TSAG (Tb3Sc2Al3O12) crystals were investigated, and capabilities to be used as a scintillator screen were demonstrated. In photoluminescence (PL) spectra, some emission lines due to Tb3+4f-4f transitions appeared from 500 to 700nm. PL quant...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2017-08, Vol.518, p.51-55
Main Authors: Yanagida, Takayuki, Okada, Go, Kojima, Takahiro, Hayashi, Takeshi, Ushizawa, Jisaburou, Kawano, Naoki, Kawaguchi, Noriaki
Format: Article
Language:English
Subjects:
Chemical elements
Crystals
Emission
Line spectra
Optical properties
Photoluminescence
Scintillation
Scintillator screen
Screens
Spectral emissivity
Studies
TGG
Transitions
TSAG
X-rays
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Summary:Optical and scintillation properties of TGG (Tb3Ga5O12) and TSAG (Tb3Sc2Al3O12) crystals were investigated, and capabilities to be used as a scintillator screen were demonstrated. In photoluminescence (PL) spectra, some emission lines due to Tb3+4f-4f transitions appeared from 500 to 700nm. PL quantum yields of TGG and TSAG were 6.5% and 50.9%, respectively. When irradiated by X-rays, these crystals showed intense scintillation, and the emission wavelengths were the same as those in PL spectra. The scintillation decay times of TGG and TSAG were 94 and 678μs, respectively. Further, we have demonstrated X-ray imaging using both TSGG and TSAG crystal plates and confirmed a capability as scintillator screens.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2017.05.029