Gadolinium oxysulfide sintered body, and scintillator, scintillator array, radiation detector, and radiation inspection apparatus containing gadolinium oxysulfide sintered body

摘要

The present invention provides a gadolinium oxysulfide sintered body having a high light output. The problem is that the ratio (T410 / T512) of the light transmittance T410 at 410 nm to the light transmittance T512 at 512 nm is 0.31 or more and 0.61 or less, or in the XRD diffraction pattern, 2θ = 20-29 ° (Iy / Ix) of the diffraction peak intensity Iy of the phase different from the gadolinium oxysulfide appearing at 2θ to the diffraction peak intensity Ix of (102) or (011) of the gadolinium oxysulfide appearing at 2θ = 30 ° ± 1 °. Is 0.1 or less, and is solved by a gadolinium oxysulfide sintered body containing at least one activator selected from the group consisting of praseodymium, terbium, and cerium.