Szintillator und Verfahren zu seiner Herstellung, sowie Röntgendetektor und Röntgen-Computertomographie-Scanner

摘要

A scintillator is disclosed that comprises a ceramic of a rare-earth oxysulfide activated with Pr, such as Gd2O2S:Pr, having: (1) a ratio of a peak value at about 270 K to that at about 140 K in a glow curve of about 0.01 or less, when the thermoluminescence intensity of the scintillator is measured at a rate of temperature increase of 15+/-5 K/min after 20 minutes irradiation with ultraviolet rays having a wavelength of 254 nm and a power of 1 W/m2 at liquid nitrogen temperature, and (2) a ratio of a peak value at about 630 nm to that at about 512 nm of a thermoluminescence of about 410 K with about 2 nm resolution of about 1 or less.