Patent Number: 
Section: abstract

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), satisfying the following ranges: 0≦a≦0.1, 0≦b≦0.1, 0≦α≦0.3, 0.0003≦β≦0.005, 0.02≦γ≦0.2, 0.27≦u≦0.75, and 0≦v≦0.02. Preferably, 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, and 0≦v≦0.02.