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Journal of Nanostructures، جلد ۹، شماره ۴، صفحات ۶۱۶-۶۲۲
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عنوان انگلیسی Synthesis and characterization of Gd2O2 S: Tb3+ phosphor powder for X-ray imaging detectors
چکیده انگلیسی مقاله Gadolinium oxysulfide phosphor doped with trivalent terbium have been synthesized using urea homogenous precipitation and followed by sulfurization at 800 °C under argon atmosphere. Structural and morphological of synthesized phosphor powder were characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectrometry (FT-IR). Hexagonal structure of Gd2O2S:Tb3+ phosphor was confirmed by XRD. Compositional analysis were carried out by energy dispersive x-ray (EDX) and particle induced x-ray emission (PIXE). Photoluminescence emission spectra was measured by fluorescent spectrometer. A sedimentation technique is used to deposit the phosphor powder directly on the glass substrate using poly vinyl alcohol as a paste. A number of phosphor layers have been synthesized with the layer thickness ranging from 150 to 268 µm. Measurement results of x-ray conversion efficiency for layers were investigated using 300 kVp X-ray tube in which the maximum light output and contrast were observed for layer with a thickness of 193 µm. Oxysulfide phosphor layer was analyzed by ion beam induced luminescence (IBIL). Emitting of green light from phosphor layer confirm its luminescence property.
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نویسندگان مقاله Maliheh Hasani |
Department of Physics, Payame noor University (PNU), Tehran, Iran

Parvin Sarabadani |
Nuclear Science and Technology Research Institute, Karaj, Iran

Ali Hashemizadeh Aghda |
Department of Physics, Payame noor University (PNU), Tehran, Iran

نشانی اینترنتی http://jns.kashanu.ac.ir/article_53619_65802dff17bddd5a0a62748868e47b73.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/497/article-497-2145472.pdf
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