Performance of BaFCl:Eu2+ scintillating composites for X-ray imaging screens

Technical Report · Thu Sep 12 00:00:00 EDT 2019

DOI:https://doi.org/10.2172/1565809· OSTI ID:1565809

Richards, Cameron Gregory ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

A cost-effective solution for improving X-ray imaging detectors is presented through the use of a translucent scintillating composite and pixelated screen structure. A large quantity of BaFCl:Eu²⁺ polycrystalline scintillator powder was synthesized via flux growth and its optical properties characterized through photoluminescence (PL) and absolute quantum yield (QY). UV-curable composites containing the BaFCl:Eu²⁺ material were fabricated with differing amounts of NOA1665 and NOA170 optical adhesives. It was determined that, when the two resins were combined, the translucency of the resulting composite could be enhanced. The BaFCl:Eu²⁺composite was also cast into a pixelated glass screen containing an array of 160 μm x 160 μm holes by two separate methods: composite paste application and powder-resin application. Based on visual inspection, using a composite paste to fill the apertures proved to be more effective in creating a uniform packing.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: 89233218CNA000001
• OSTI ID: 1565809
• Report Number(s): LA-UR-19-29163
• Country of Publication: United States
• Language: English