| 摘要 |
The inorganic scintillator of the invention is an inorganic scintillator capable of producing scintillation by radiation, which is a crystal comprising a metal oxide containing Lu, Gd, Ce and Si and belonging to space group C2/c monoclinic crystals, and which satisfies the condition specified by the following inequality (1A), wherein A<SUB>Lu </SUB>represents the number of Lu atoms in the crystal and A<SUB>Gd </SUB>represents the number of Gd atoms in the crystal. <?in-line-formulae description="In-line Formulae" end="lead"?>{A<SUB>Lu</SUB>/(A<SUB>Lu</SUB>+A<SUB>Gd</SUB>)}<0.50 (1A) <?in-line-formulae description="In-line Formulae" end="tail"?>
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