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• W2321248129 abstract "Abstract Rhenium-186g ( T 1/2 = 89.2 h) is a β − emitter suitable for therapeutic applications. Current production methods rely on reactor production via 185 Re( n , γ ) which results in low specific activities, thereby limiting its use. Production by p , d activation of enriched 186 W results in a 186g Re product with a higher specific activity, allowing it to be used for targeted therapy with limited receptors. A test target consisting of pressed, sintered nat WO 3 was proton irradiated at Los Alamos (LANL-IPF) to evaluate product yield and impurities, irradiation parameters and wet chemical Re recovery for proof-of-concept for bulk production of 186g Re. We demonstrated isolation of 186g Re in 97% yield from irradiated nat WO 3 targets within 12 h of end of bombardment (EOB) via an alkaline dissolution followed by anion exchange. The recovery process has potential for automation, and WO 3 can be easily recycled for recurrent irradiations. A 186g Re batch yield of 42.7 ± 2.2 μCi/μAh or 439 ± 23 MBq/C was obtained after 24 h in an 18.5 μA proton beam. The target entrance energy was determined to be 15.6 MeV. The specific activity of 186g Re at EOB was measured to be 1.9 kCi (70.3 TBq) mmol −1 , which agrees well with the result of a previous 185,186m Re co-production EMPIRE and TALYS modeling study assuming similar conditions. Utilizing enriched 186 WO 3 , we anticipate that a proton beam of 250 μA for 24 h will provide batch yields of 256 mCi (9.5 GBq) of 186g Re at EOB with specific activities even higher than 1.9 kCi (70.3 TBq) mmol −1 , suitable for therapy applications." @default.
• W2321248129 created "2016-06-24" @default.
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• W2321248129 date "2013-03-19" @default.
• W2321248129 modified "2023-10-05" @default.
• W2321248129 title "Proton irradiation parameters and chemical separation procedure for the bulk production of high-specific-activity ^186gRe using WO₃ targets" @default.
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• W2321248129 doi "https://doi.org/10.1524/ract.2013.2031" @default.
• W2321248129 hasPublicationYear "2013" @default.
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