Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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The luminescence properties of Eu3+ or Tb 3+ doped Lu2Gd1Ga2Al3O12 phosphors for X-ray imaging

  • M.J. Oh (Department of of Radiology, Daegu Health College) ;
  • Sudipta Saha (Institute of Nuclear Science and Technology Space Science Institute) ;
  • H.J. Kim (Department of Physics, Kyungpook National University)
  • Received : 2023.04.26
  • Accepted : 2023.08.01
  • Published : 2023.12.25
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Abstract

The Tb3+ or Eu3+-doped Lu2Gd1Ga2Al3O12 phosphor were fabricated by funace at 1500 ℃ for 12 h using a solid state reaction. The XRD (X-ray diffraction_Panalytical X'Pert Pro) and FE-SEM (field emission scanning electron microscope) are measured to confirm the crystalline structure and surface morphology of the phosphor. The Tb3+-doped Lu2Gd1Ga2Al3O12 phosphor emits the lights in 470~650 nm wavelength range due to transitions from 5D4 to 7Fj. Therefore, it shows the green region in the CIE chromaticity diagram under both UV and X-rays excitations. The Eu3+-doped Lu2Gd1Ga2Al3O12 phosphor emits the lights in 550~750 nm wavelength range because of 5Di to 7Fj. The emission is confirmed to be in the red region using the CIE chromaticity diagram. The Tb3+ or Eu3+-doped Lu2Gd1Ga2Al3O12 phosphor shows the characteristic f-f transition with a long decay time, which is about several milliseconds. They have the high efficiency of light emission for X-ray because of their high effective Z number (Zeff = 58.5) and density. Therefore, they are very much promising phosphors for X-ray imaging application in medical fields.

Keywords

Acknowledgement

These investigations were supported by the National Research Foundation of Korea, funded by the Ministry of Science and Technology, funded by the Ministry of Science and ICT, Korea under projects NRF No-2021R1A2B5B03002006, NRF No-2018R1A6A1A06024970.

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