1. Photonic-crystals-based GAGG:Ce scintillator with high light output and fast decay time for soft X-ray detection.
- Author
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Yu, Huaina, Meng, Xiangyu, Yang, Shumin, Zhao, Jun, Zhen, Xiangjun, and Tai, Renzhong
- Subjects
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SCINTILLATORS , *SOFT X rays , *X-ray detection , *SYNCHROTRON radiation , *PHOTONIC crystals , *TITANIUM dioxide - Abstract
Gd 2 O 2 S:Tb (P43) powder was widely used in soft X-ray detection due to its high light yield. Compared with P43, GAGG:Ce scintillator has high light transmittance, fast decay time and strong radiation resistance. Photonic crystals (PhCs) can be used to enhance the light output of scintillator. In this paper, two-dimensional (2D) photonic crystals that consist of square arrays of air holes etched into TiO 2 layer were fabricated on the exit surface of GAGG:Ce scintillator to enhance its light output. The luminescence spectra and the light output of GAGG:Ce scintillator with/without PhCs were measured at the BL08U1A beamline of Shanghai Synchrotron Radiation Facility. The results showed that the light output of GAGG:Ce scintillator with PhCs can be enhanced by a factor of 1.43 times compared with the reference GAGG:Ce scintillator, 2.35 times compared with YAG:Ce scintillator, 1.24 times compared with Gd 2 O 2 S:Tb scintillation ceramic and 0.76 times compared with P43 powder layer with the mass thickness of about 1.3mg/cm 2 with optical grease coupling. No significant change was observed in luminescence decay time between GAGG:Ce scintillator with and without PhCs. It makes GAGG:Ce scintillator with PhCs a promising material instead of P43 powder and YAG:Ce scintillator in soft X-ray detector. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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