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Efficiency of Luminescence of (Lu,Gd)2SiO5:Ce (LGSO:Ce) Crystal Sensory Material in the X-Ray Imaging Range

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Nuclear Radiation Nanosensors and Nanosensory Systems

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Abstract

The aim of the present study was to investigate the absolute luminescence efficiency (AE) of mixed oxyorthosilicate (Lu,Gd)2SiO5:Ce (LGSO:Ce) single crystals, under X-ray irradiation. Six (Lu,Gd)2SiO5:Ce crystal samples, with dimensions of 3 × 3 × 5, 3 × 3 × 6, 3 × 3 × 10, 3 × 3 × 15, 10 × 10 × 10 and 10 × 10 × 20 mm3 were examined. The light emitted by the crystals, was evaluated by performing measurements of the AE under X-ray exposure conditions, with tube voltages ranging from 50 to 130 kV. Results were compared with previously published data for GSO:Ce and LSO:Ce crystals. The spectral compatibility of the (Lu,Gd)2SiO5:Ce crystal, with various existing optical detectors, was investigated after emission spectra measurements. Absolute efficiency was found maximum at 130 kVp for the 3 × 3 × 15 mm3 (Lu,Gd)2SiO5:Ce crystal (25.40 E.U). AE of the 10 × 10 × 10 mm3 (Lu,Gd)2SiO5:Ce crystal was found higher than both GSO:Ce and LSO:Ce crystals, in the whole X-ray tube range. The emission spectrum of (Lu,Gd)2SiO5:Ce is excellent matched with the spectral sensitivities of photocathodes and silicon photomultipliers often employed in radiation detectors. Considering the high luminescence efficiency values and the spectral compatibility with the various photodetectors, (Lu,Gd)2SiO5:Ce crystal could be considered for use in combined medical imaging detectors i.e. integrated PET/CT detectors.

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Author information

Authors and Affiliations

  1. Radiation Physics, Materials Technology and Biomedical Imaging Laboratory, Department of Biomedical Engineering, Technological Educational Institute of Athens, 122 10, Egaleo, Athens, Greece

    C. Michail, I. Valais, S. David, N. Kalivas, G. Fountos & I. Kandarakis

  2. Department of Medical Radiologic Technology, Technological Educational Institute of Athens, 122 10, Athens, Greece

    A. Bakas

  3. Department of Electronic Computer Systems Engineering, Piraeus University of Applied Sciences, Petrou Ralli & Thivon 250, GR-122 44, Aigaleo, Greece

    Panayotis H. Yannakopoulos & D. Nikolopoulos

Authors
  1. C. Michail
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  2. I. Valais
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  3. S. David
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  4. A. Bakas
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  5. N. Kalivas
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  6. G. Fountos
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  7. I. Kandarakis
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  8. Panayotis H. Yannakopoulos
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  9. D. Nikolopoulos
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Correspondence to D. Nikolopoulos .

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Editors and Affiliations

  1. Georgian Technical University, Tbilisi, Georgia

    Paata J. Kervalishvili

  2. Computer Systems Engineering, Piraeus University of Applied Sciences, Aigaleo, Greece

    Panayotis H. Yannakopoulos

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Michail, C. et al. (2016). Efficiency of Luminescence of (Lu,Gd)2SiO5:Ce (LGSO:Ce) Crystal Sensory Material in the X-Ray Imaging Range. In: Kervalishvili, P., Yannakopoulos, P. (eds) Nuclear Radiation Nanosensors and Nanosensory Systems. NATO Science for Peace and Security Series B: Physics and Biophysics. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-7468-0_7

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