Patent ID: 7692152

Claim:
A radiation detecting apparatus comprising: a sensor panel that has a substrate, and has a plurality of pixels each of which has a photoelectric conversion element for converting light into an electric signal, arranged on the substrate; and a scintillator layer arranged over the pixels, wherein the scintillator layer has a columnar crystal structure including a plurality of columnar crystals, and the scintillator layer contains cesium iodide as a main ingredient and thallium as an activator such that a concentration of the thallium in a peripheral area of the scintillator layer is higher than a concentration of the thallium in a central area of the scintillator layer, and such that the concentration of the thallium in the peripheral area of the scintillator layer is 1.0 mol % or more with respect to the concentration of cesium iodide, and the concentration of the thallium in a central part of the scintillator is 0.5 mol % or more but 1.5 mol % or less with respect to the concentration of cesium iodide; and a metal layer covering the scintillator layer.