SCINTILLATOR, SCINTILLATOR ARRAY, RADIATION DETECTOR AND RADIATION EXAMINATION DEVICE

• Main Authors: OYAIZU, Eiji, MORIMOTO, Kazumitsu, ADACHI, Yoshitaka, SAITO, Akihisa, TOYOSHIMA, Masaki, ROKUTANDA, Takashi
• Format: Patent
• Language: English; French; German
• Published: 23.10.2019
• Subjects: ADHESIVES; CHEMISTRY; DYES; GAMMA RAY OR X-RAY MICROSCOPES; IRRADIATION DEVICES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEASUREMENT OF NUCLEAR OR X-RADIATION; MEASURING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PAINTS; PHYSICS; POLISHES; TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOTOTHERWISE PROVIDED FOR; TESTING

To suppress a decrease in optical output of a scintillator. A scintillator includes a sintered body of 1 mm 3 or less that contains a rare earth oxysulfide. In a composition image obtained by observing a cross-section of the sintered body under a scanning electron microscope, the sum of the number of oxide regions that contain at least one of a rare earth oxide different from the rare earth oxysulfide and an impurity metal oxide and the number of sulfide regions that contain at least one of a rare earth sulfide different from the rare earth oxysulfide and an impurity metal sulfide, which exist in a unit area of 500 µm × 500 µm, is five or less (including zero). Each of the oxide regions and the sulfide regions has a major axis of 100 µm or less (including zero).