CERAMIC SCINTILLATOR, AND RADIATION DETECTOR AND RADIOGRAPHIC EXAMINATION APPARATUS USING SAME

• Main Authors: FUKUTA, YUKIHIRO, OOTA, HIROYASU, TAMATANI, MASAAKI
• Format: Patent
• Language: English; French; Japanese
• Published: 31.03.2005
• Edition: 7
• Subjects: ADHESIVES; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DYES; LIME, MAGNESIA; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEASUREMENT OF NUCLEAR OR X-RADIATION; MEASURING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PHYSICS; POLISHES; REFRACTORIES; SLAG; TESTING; TREATMENT OF NATURAL STONE

A ceramic scintillator comprises a sintered body of a lutetium oxysulfide phosphor containing at least one element selected from Pr, Tb and Eu as an activator. The sintered body of a lutetium oxysulfide phosphor contains 5-15 ppm of an alkali metal element and 5-40 ppm of phosphorus. Such a ceramic scintillator can sufficiently make use of the intrinsic characteristics of the lutetium oxysulfide phosphor and has good sensitivity in X-ray detection even when it is downsized. L'invention concerne un scintillateur en céramique comprenant un corps fritté en phosphore d'oxysulfure de lutécium contenant au moins un élément choisi parmi Pr, Tb et Eu en tant qu'activateur. Le corps fritté en phosphore d'oxysulfure de lutécium contient entre 5 et 15 ppm d'un élément métallique alcalin et entre 5 et 40 ppm de phosphore. Un tel scintillateur en céramique peut utiliser suffisamment de caractéristiques intrinsèques du phosphore d'oxysulfure de lutécium et possède une sensibilité élevée à la détection de rayons X, même lorsque sa taille est réduite.