Patent Number: 
Section: claims

1. A fluorescent material having a composition formula represented as (Gd1-α-β-γLαCeβTbγ)3+a(Al1-u-vGauScv)5-bO12 (L is at least one element selected from Y and Lu), where a, b, α, β, γ, u and v satisfy the following ranges:wherein a, b, α, β, γ, u and v satisfy the following ranges:0<a≦0.07,0<b≦0.07,0<α≦0.15,0.0003≦β≦0.004,0.03≦γ≦0.15,0.35≦u≦0.70, and0≦v≦0.02. 2. The fluorescent material of claim 1, wherein β satisfies the following range:0.0005≦β≦0.003. 3. The fluorescent material of claim 1, wherein v satisfies the following range:0.003≦v≦0.02. 4. The fluorescent material of claim 1, wherein a=b. 5. The fluorescent material of claim 1, wherein the fluorescent material is a polycrystalline material, and an average crystal grain size of the sintered material is 0.05 μm or more and 5 μm or less. 6. The fluorescent material of claim 1, wherein the fluorescent material is in the form of a plurality of fibers, the average fiber diameter is 1 μm or more and 50 μm or less. 7. A scintillator including fluorescent material of claim 6 and having a plate shape, wherein the fluorescent materials are disposed in parallel to one another so that a longitudinal direction of a fibrous shape of the fluorescent materials is along a thickness direction of the plate shape. 8. A radiation image conversion panel comprising:a scintillator of claim 7; anda photoelectric converter for converting light into an electrical signal.