MULTI-ELEMENT X-RAY RADIATION DETECTOR, RARE EARTH X-RAY LUMINOPHORE THEREFOR, AND METHOD FOR FORMING A MULTI-ELEMENT SCINTILLATOR AND DETECTOR AS A WHOLE

The invention relates to X-ray technology and medical diagnostics and can be used for carrying out gamma flaw detection on various articles and piping systems. The technical result is an increase in the contrast of the integrated image that is produced. A multi-element X-ray radiation detector consi...

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Hauptverfasser: SOSCHIN, NAUM PETROVICH, ULASYUK, VLADIMIR NIKOLAEVICH
Format: Patent
Sprache:eng ; fre ; rus
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Zusammenfassung:The invention relates to X-ray technology and medical diagnostics and can be used for carrying out gamma flaw detection on various articles and piping systems. The technical result is an increase in the contrast of the integrated image that is produced. A multi-element X-ray radiation detector consists of a flat multi-element scintillator in the form of a discrete set of hetero-phase luminescent elements which are arranged in the cells of a mesh made from a metal which absorbs X-ray radiation and reflects light, the increment size of which mesh corresponds to the increment size of the photo receiver matrix. The metallic mesh that forms the multi-element luminescent scintillator is made from elements having an atomic number of from N = 26 (iron) to N = 74 (tungsten), has silver-plated coils, and separates the scintillator elements optically from one another. The coils of the mesh have a diameter of from 0.06 mm to 0.16 mm, and the area of the effective cross section of the mesh is from 45% to 82%. The scintillator consists of an X-ray luminophore based on a multi-ligand oxysulphide of gadolinium-lutetium-europium with the addition of bismuth and rhenium, and also fluorine, chlorine, bromine and iodine. The process of synthesis is carried out in two stages. In the first stage, oxyhalides of the elements making up a cationic subgroup are formed by reacting the initial coprecipitated oxides of the rare earth elements, Bi and Re with ammonium halides. The resulting product is then subjected to repeated thermal treatment in an alkali chalcogenide melt. L'invention concerne les équipements radiologiques et la diagnostique médicale, la détection de défauts par rayons gamma dans divers articles et systèmes de tuyauterie. Le résultat technique est une augmentation du contraste de l'image intégrée obtenue. Un détecteur à éléments multiples à rayonnement X est constitué d'un scintillateur plat à éléments multiples se présentant comme un ensemble discret d'éléments luminescents à hétéro-phase disposés dans les cellules d'un réseau constitué d'un métal qui absorbe le rayonnement X et reflète la lumière, dont le pas correspond à celui de la matrice du récepteur photo. Le réseau métallique qui forme le scintillateur luminescent à éléments multiples est fabriqué à partir des éléments ayant un numéro atomique de N = 26 (fer) à N = 74 (tungstène), comporte des enroulements en métal argenté, et sépare optiquement les uns des autres les éléments du scintillateur. Les enrouleme