Phosphor and radiation image storage panel employing the same.

摘要

A divalent europium activated barium fluorohalide phosphor having the formula (I):
(Ba1-a,M11a)FX·bNaX'·c{Si}·d{Aℓ}:xEu2+ (1)
in which M" is at least one alkaline earth metal selected from the group consisting of Ca and Sr; each of X and X' is at least one halogen selected from the group consisting of Cℓ, Br and I; {Si} and {Aℓ} are respectively Si component and Aℓ component; a, b and x are numbers satisfying the conditions of 0≦a≦5×10-2, 0<b≦2.0 and 0 <x s 0.2, respectively; and c and dare numbers satisfying the conditions of 10-5 ≦ c + d ≦ 0.5 and 0 < c/(c + d) < 1.0. A radiation image storage panel employing said phosphor is also disclosed.