Rare earth activated rare earth oxysulfide phosphor for direct X-ray detection

As a europium-activated rare earth oxysulfide phosphor with an enhanced X-ray absorption coefficient for direct-X-rays, a lutetium oxysulfide phosphor has been shown to be preferred, wherein said phosphor further prompt emits red light, which makes it particularly suitable for use as a scintillator material in a device for direct-radiography.