| 摘要 |
An aspect in accordance with the present invention provides, a fluorescent material with garnet structure containing Gd, Al, Ga, and O at least, containing Lu and/or Y, and also containing Ce as an activator, wherein said fluorescent material is expressed as (Gd<SUB>1-x-z</SUB>L<SUB>x</SUB>Ce<SUB>z</SUB>)<SUB>3+a</SUB>(Al<SUB>1-u</SUB>Ga<SUB>u</SUB>)<SUB>5-a</SUB>O<SUB>12</SUB>, wherein L is Lu and/or Y, wherein 0<a<=0.15, 0<x<1.0, 0.0003<=z<=0.0167 (here, x+z<1.0), and 0.2<=u<=0.6.
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