Scintillator, scintillator array, radiation detector, and radiation examination device

• Main Authors: Toyoshima, Masaki, Oyaizu, Eiji, Morimoto, Kazumitsu, Rokutanda, Takashi, Adachi, Yoshitaka, Saito, Akihisa
• Format: Patent
• Language: English
• Published: 20.11.2018
• Subjects: ADHESIVES; CHEMISTRY; DIAGNOSIS; DYES; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEASUREMENT OF NUCLEAR OR X-RADIATION; MEASURING; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PHYSICS; POLISHES; SURGERY; TESTING

To suppress a decrease in optical output of a scintillator. A scintillator includes a sintered body of 1 mm3 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 zero or more and five or less. Each of the oxide regions and the sulfide regions has a major axis of zero or more and 100 μm or less.