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. 2021 Jul 1;49(1):279–289. doi: 10.1007/s00259-021-05460-7

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© The Author(s) 2021

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Fig. 5 — Gamma spectrum for various ²²⁵Ac samples: (a) ²²⁵Ac product (initial separation) after 4 days from the end of bombardment (EOB), (b) ²²⁵Ac product (secondary separation) after 20 days from EOB, and (c) commercially available authentic ²²⁵Ac (generator-made)