| 摘要 |
PROBLEM TO BE SOLVED: To provide an inorganic scintillator having high fluorescence output and high conversion efficiency of a photodiode and having peak wavelength of fluorescent intensity in wavelength area of 450-600 nm, and a radiation detector and PET apparatus using the inorganic scintillator. SOLUTION: The inorganic scintillator has a chemical composition represented by the formula Ce<SB>x</SB>Ln<SB>y</SB>Si<SB>z</SB>O<SB>u</SB>(Ln represents at least two kinds of elements selected from Y, Gd and Lu; 0.001≤x≤0.1; 1.9≤y≤2.1; 0.9≤z≤1.1; 4.9≤u≤5.1), and emits fluorescence by incidence of radiation and has≥450 nm and≤600 nm maximum peak wavelength in intensity spectrum of the fluorescence. COPYRIGHT: (C)2007,JPO&INPIT
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