1. Natural and enriched Cr target development for production of Manganese-52.
- Author
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Pyles JM, Omweri JM, and Lapi SE
- Subjects
- Oxides, Chromium, Manganese, Radioisotopes
- Abstract
52 Mn is a promising PET radiometal with a half-life of 5.6 days and an average positron energy of 242 keV. Typically, chromium of natural isotope abundance is used as a target material to produce this isotope through thenat/52 Cr(p,n)52 Mn reaction. While natural Cr is a suitable target material, higher purity52 Mn could be produced by transitioning to enriched52 Cr targets to prevent the co-production of long-lived54 Mn (t1/2 = 312 day). Unfortunately,52 Cr targets are not cost-effective without recycling processes in place, therefore, this work aims to explore routes to prepare Cr targets that could be recycled. Natural Cr foils, metal powder pellets, enriched chromium-52 oxide and Cr(III) electroplated targets were investigated in this work. Each of these cyclotron targets were irradiated, and the produced52 Mn was purified, when possible, using a semi-automated system. An improved purification by solid-phase anion exchange from ethanol-HCl mixtures resulted in recoveries of 94.5 ± 2.2% of52 Mn. The most promising target configuration to produce a recyclable target was electroplated Cr(III). This work presents several pathways to optimize enriched Cr targets for the production of high purity52 Mn., (© 2023. The Author(s).)- Published
- 2023
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