X-RAY PHOSPHOR AND X-RAY SENSITIZED PAPER

PURPOSE:To obtain a phosphor having high X-ray absorption characteristic and being excellent in luminous efficiency and afterglow characteristic etc. and suited to an X-ray sensitized paper, by incorporating a divalent metal and an alkali metal within a specific range of quantity in a rate earth tan...

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Bibliographische Detailangaben
Hauptverfasser:	TAKETEI SATOSHI, SHINOMIYA MOTOICHI, TAKEDA MIZUYASU, NAKAJIMA SHIGEHARU
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES AUXILIARY PROCESSES IN PHOTOGRAPHY CHEMISTRY CINEMATOGRAPHY DYES ELECTROGRAPHY GAMMA RAY OR X-RAY MICROSCOPES HOLOGRAPHY IRRADIATION DEVICES MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NUCLEAR ENGINEERING NUCLEAR PHYSICS PAINTS PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES PHOTOGRAPHY PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES PHYSICS POLISHES TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOTOTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a phosphor having high X-ray absorption characteristic and being excellent in luminous efficiency and afterglow characteristic etc. and suited to an X-ray sensitized paper, by incorporating a divalent metal and an alkali metal within a specific range of quantity in a rate earth tantalate phosphor or a rare earth niobate phoshor. CONSTITUTION:An X-ray phosphor represented by the formula (wherein M'' represents a divalent metal such as Be, Mg, Ca, Sr, Ba, Zn, or Cd; M represents an alkali metal such as Li, Na, or K; Ln represents Y, Gd La, or Lu; D represents Ta or Nb; 0