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Behaviour of Y203:Eu3+ Scintillator under Radiation used in Medical Applications

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Published: Dec 5, 2019
DOI: https://doi.org/10.12681/hnps.2425
I. Kandarakis
Dept. of Medical Instrumentation Technology, Technological Educational Institution of Athens
D. Cavouras
Dept. of Medical Instrumentation Technology, Technological Educational Institution of Athens
G. S. Panayiotakis
Dept. of Medical Physics, Medical School, University of Patras
D. Koutsogiorgis
Applied Physics Lab., University of Ioannina
D. Triantis
Dept. of Electronics, Technological Educational Institution of Athens
C. D. Nomicos
Dept. of Electronics, Technological Educational Institution of Athens
Abstract

The Y2 O3:Eu3+ scintillator was studied for use in radiation detectors of medical imaging systems. Y2 O3 :Eu3+ was used in the form of laboratory prepared test screens. The x-ray luminescence efficiency of the screens was measured for tube voltages up 250 kVp. The intrinsic x-ray to light conversion efficiency (nc) and other optical parameters of the Y2 03:Eu3+ scintillator related to optical scattering, absorption, and reflection were determined. The light emission spectrum of Y2 03:Eu3+ was measured (λ=613 rim). The x-ray luminescence efficiency peaked at 180 mg/cm2 screen coating weight. The intrinsic x-ray to light conversion efficiency was found to be nc =0.095. Results indicated that Y2 03:Eu3+ is a medium to high overall performance material that could be used in medical imaging systems.

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