Abstract
In this paper, we investigated the imaging characteristic of Eu3+-doped Gd2O3 nano phosphor for high resolution digital x-ray imaging system. The Gd2O3:Eu3+ nano particles were synthesized using a low temperature solution-combustion method and then sintered at 900 °C. From the XRD and FE-SEM analysis, the x-ray peaks corresponding to the cubic phase of , , , with monoclinic phase and the average diameter of the particle was determined to be about 10~40 nm. The PL spectrum measurement shows the fabricated Gd2O3:Eu3+ nano particles, the emission peaks correspond to transition from the excited 5D0 level to 7FJ (J=0,1,2,3) level of the 4F6 configuration of the Eu3+ ion and a commercial bulk phosphor’s and the strong peak exhibits at 611 nm. The evaluation of the imaging performance was performed by determining the Modulation Transfer Function (MTF), Noise Power Spectrum (NPS) and Detective Quantum Efficiency (DQE). Determined MTF was 70 % at 3 lp/mm and DQE (0) was 37 %. These results means that Gd2O3:Eu3+ nano phosphor may be appropriate for low-dose and high resolution digital x-ray imaging system.
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