Radiation image converting panel

A method of fabricating a radiation image converting panel, comprising the steps of:

• preparing a supporting body having a first main surface, in which a film forming region including at least a gravity center position of said first main surface exists, and a second main surface opposing said first main surface;
• preparing a first evaporation source holding a first metal material comprised of at least a base material for forming a radiation converting film and a second evaporation source holding a second metal material comprised of at least an activator material containing Eu;
• placing said support body on a surface of a holder rotatable about a predetermined axis orthogonal to said surface of said holder while the gravity center position of said first main surface is positioned on the predetermined axis;
• allocating said first and second evaporation sources such that a radiation converting film, to be formed on said film forming region of said first main surface, has a positive or negative Eu concentration gradient in a middle area sandwiched by a central area and a peripheral area, said central area being around the gravity center position whose radius equals 5% or less of a minimum distance from the gravity center position to the edge of said film forming region, said peripheral area being sandwiched by an edge of the film forming region and a circumference of a reference circle centering the gravity center position whose radius equals 40% or more but 80% or less of the minimum distance from the gravity center position to the edge of the film forming region;
• and
• forming said radiation converting firm, which is comprised of columnar crystals which are coincident or tilted at a predetermined angle with respect to a normal direction of said first main surface, on said film forming region of said first main surface, by individually introducing the metal vapor from said first evaporation source and the metal vapor from said second evaporation source onto said film forming region of said first main surface while rotating said support body about the predetermined axis.