| abstract |
(57) [Summary] [Object] To provide a novel phosphor having high sensitivity to radiation such as X-rays and emitting light in the visible light region or the near-ultraviolet region. Composition: BiOX: yAc (where X is at least one halogen selected from the group consisting of F, Cl and Br; Ac is Eu, T b, Pr and Ce, which is at least one rare earth element selected from the group consisting of b, Pr and Ce; and x is a numerical value in the range of 0 <y ≦ 0.2), and a bismuth oxyhalide phosphor represented by The radiographic intensifying screen used. |