Lu 2 O 3 :Eu(C Eu :5mol%) powder scintillators with nanocrystalline structures were successfully synthesized via a precipitation method and subsequent calcination treatment as a conversion material for X-ray imaging detectors. In this work, a homogeneous precipitation process was carried out using DEA(diethanolamine) as a precipitant to prepare nanocrystalline Eu-doped Gd 2 O 3 powders. The microstructures, crystal structure and scintillation properties such as luminescent spectra, decay time and light intensity were measured as a function of calcination temperature in heat-treatment of the synthesized powder. The sample prepared at 1200 ˚C calcination temperature showed the highest light intensity. And the scintillator showed a strong red emission light at near 611nm under photo-and X-ray luminescence for its potential X-ray imaging detector applications. KEYWORDS: X-ray detectors; Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators); Scintillators and scintillating fibres and light guides; X-ray radiography and digital radiography (DR)
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