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• W2604545277 abstract "Scandium-44 g (half-life 3.97 h) shows promise for application in positron emission tomography (PET), due to favorable decay parameters. One of the sources of 44gSc is the 44Ti/44gSc generator, which can conveniently provide this radioisotope on a daily basis at a diagnostic facility. Titanium-44 (half-life 60.0 a), in turn, can be obtained via proton irradiation of scandium metal targets. A substantial 44Ti product batch, however, requires high beam currents, long irradiation times and an elaborate chemical procedure for 44Ti isolation and purification. This study describes the production of a combined 175 MBq (4.7 mCi) batch yield of 44Ti in week long proton irradiations at the Los Alamos Isotope Production Facility (LANL-IPF) and the Brookhaven Linac Isotope Producer (BNL-BLIP). A two-step ion exchange chromatography based chemical separation method is introduced: first, a coarse separation of 44Ti via anion exchange sorption in concentrated HCl results in a 44Tc/Sc separation factor of 102–103. A second, cation exchange based step in HCl media is then applied for 44Ti fine purification from residual Sc mass. In summary, this method yields a 90–97% 44Ti recovery with an overall Ti/Sc separation factor of ≥106." @default.
• W2604545277 created "2017-04-14" @default.
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• W2604545277 date "2017-07-01" @default.
• W2604545277 modified "2023-10-03" @default.
• W2604545277 title "Proton-induced production and radiochemical isolation of 44Ti from scandium metal targets for 44Ti/44Sc generator development" @default.
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• W2604545277 doi "https://doi.org/10.1016/j.nucmedbio.2017.03.006" @default.
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