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(Gd₁-x-y TbxCey)₂(MoO₄)₃단결정의 육성과 형광특성
기문광,정중현,김중환 釜山水産大學校 1992 釜山水産大學 硏究報告 Vol.32 No.2
This paper studied the concentration effect and energy transfer process between ??ion and ?? ion in gadolinium molybdate crystal in order to inquire into the possibility for obtaining new laser material. Compound were prepared by the usual solid state reaction technique. All of these compounds have been grown as single crystal by Czochralski method. Absorption spectra of ?? in Gd�(MoO�)�were observed broad and strong. Extraordinally in different materials absorption band is shift to longer wavelength. Energy transfer efficiency from ?? to ?? is merely 17% for (x=0.001, y=0.001) crystal. But in the case of (x=0.1, y=0.001) crystal, intensity of emission spectra of ?? were a thousand times higher than that of former crystal due to a high degree of energy transfer efficiency.
Scintillation properties of the Gd3Al2Ga3O12 : Ce crystal
김혜림,김홍주,장은정,이원근,기문광,Heun-Duk Kim,전구식,Vladimir Kochurikhin 한양대학교 세라믹연구소 2015 Journal of Ceramic Processing Research Vol.16 No.1
We investigated luminescence and scintillation properties of the Gd3Al2Ga3O12 : Ce (GAGG) crystal grown in TPS(Total Polishing Solution) Co.. The GAGG crystal has the highest light yield among oxide crystal at room temperature and fast decay time for the detection of radioactivity and in nuclear and particle physics experiments and medical imaging. The scintillation properties of the GAGG crystal were studied by comparing the GAGG crystals grown by two companies. We measured an X-ray induced emission spectra, an energy resolution, an absolute light yield and a decay time. A pulse shape discrimination capability for a and g-ray was also demonstrated.