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Electrical characteristics of hybrid detector based Gd2O2S:Tb-Selenium for digital radiation imaging

Authors
Journal
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
0168-9002
Publisher
Elsevier
Publication Date
Volume
546
Identifiers
DOI: 10.1016/j.nima.2005.03.027
Keywords
  • Digital X-Ray Detector
  • Gd2O2S:Tb
  • Amorphous Selenium
  • X-Ray Sensitivity

Abstract

Abstract Fine Gd 2O 2S:Tb powders were synthesized by using a solution-combustion method for a high-resolution digital X-ray imaging detector. The PL spectrum showed that the phosphor was fully crystallized and that the Tb 3+ ions substituted well for the Gd 3+ sites. To investigate the X-ray response of the phosphor, a uniform Gd 2O 2S:Tb film was grown using a screen-printing method. The X-ray sensitivities of the 100 μm-Gd 2O 2S:Tb/30 μm -Se and 200 μm -Se detector were 470 and 420 pC/cm 2/mR, respectively, at an electric field of 10 V/μm. The results of the study suggest that the hybrid detector has a significant potential in the application of digital radiography and fluoroscopy systems.

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