| 摘要 |
The present invention provides a fluorescent substance represented by the following general formula: (A<SUB>1-x</SUB>B<SUB>x</SUB>)<SUB>2</SUB>Si<SUB>2</SUB>O<SUB>7</SUB>, wherein A is at least one member selected from the group consisting of Gd, Y, Lu and La, B is at least one member selected from the group consisting of rare earth elements other than A and x is a numerical value specified by the formula: 0<x<=0.2 and which can emit light rays having a wavelength falling within the range of ultraviolet, visible and infrared regions in response to, for instance, optical stimuli, electron beam stimuli, electric field stimuli, stress stimuli and radiation stimuli; a fluorescent composition comprising such a fluorescent substance dispersed in a silica glass matrix; and a scintillator obtained using the foregoing substance or composition. These fluorescent substance, fluorescent composition, scintillator material and fluorescent material have high luminous outputs and are excellent in the processability.
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