Hydrothermal synthesis, structure and scintillation characterization of nanocrystalline Eu-doped Gd2O3 materials and its X-ray imaging applications |
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Authors: | Bo Kyung Cha P. MuralidharanSeung Jun Lee Do Kyung KimGyuseong Cho Sungchae JeonYoung Huh |
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Affiliation: | a Advanced Medical Device Research Center, Korea Electrotechnology Research Institute, Gyeonggi-do, Republic of Korea b Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejoen, Republic of Korea c Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejoen, Republic of Korea |
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Abstract: | Nanocrystalline Gd2O3:Eu scintillators were successfully synthesized using a hydrothermal method and subsequent calcination treatment in the electrical furnace as an X-ray to visible light conversion material for an indirect X-ray image sensor. In this work, various Gd2O3:Eu scintillators were prepared in accordance with different synthesis conditions such as doped-Eu concentration, different calcination temperatures of 600-1400 °C and calcination time of 1-10 h. The transition of morphology from nanorods to particles was observed as the calcination temperature of Gd2O3:Eu scintillator increased. And the phase transformation of the sample from cubic to monoclinic structure was discovered at 1300 °C calcination temperature. In addition, scintillation properties such as luminescent spectra and light intensity under 266 nm UV illumination were measured as a function of calcination condition of as-synthesized Gd2O3:Eu powder. The nanocrystalline Gd2O3:Eu scintillator with a strong red light emission at near 611 nm wavelength under photo- and X-ray excitation will be employed for its potential X-ray image sensor applications in the future. |
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Keywords: | Hydrothermal synthesis Nanocrystalline Gd2O3:Eu scintillator X-ray imaging detector |
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