Hunter College of the City University of New York, New York, 10065, USA; Graduate Center of the City University of New York, New York, 10016, USA.
Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA; Facility for Rare Isotope Beams, Michigan State University, East Lansing, MI, 48824, USA.
Appl Radiat Isot. 2022 Nov;189:110414. doi: 10.1016/j.apradiso.2022.110414. Epub 2022 Aug 19.
During routine operation of the Facility for Rare Isotope Beams (FRIB), radionuclides will accumulate in both the aqueous beam dump and along the beamline in the process of beam purification. These byproduct radionuclides, many of which are far from stability, can be collected and purified for use in other scientific applications in a process called isotope harvesting. In this work, the viability of Zr harvesting from solid components was investigated at the National Superconducting Cyclotron Laboratory. A secondary Zr beam was stopped in a series of collectors comprised of Al, Cu, W, and Au foils. This work details irradiation of the collector foils and the subsequent radiochemical processing to isolate the deposited Zr (and its daughter Y) from them. Total average recovery from the Al, Cu, and Au collector foils was (91.3 ± 8.9) % for Zr and (95.0 ± 5.8) % for Y, respectively, which is over three times higher recovery than in a previous aqueous-phase harvesting experiment. The utility of solid-phase isotope harvesting to access elements such as Zr that readily hydrolyze in near-neutral pH aqueous conditions has been demonstrated for application to harvesting from solid components at FRIB.
在乏同位素束流设施（FRIB）的常规运行过程中，放射性核素将在水射流靶和束流净化过程中沿着束流线积累。这些副产物放射性核素，其中许多远离稳定性，可以收集和纯化，用于其他科学应用，这个过程称为同位素收获。在这项工作中，国家超导回旋加速器实验室研究了从固体成分中收获锆的可行性。二次锆束流被一系列由铝、铜、钨和金箔组成的收集器停止。这项工作详细描述了对收集箔的辐照以及随后的放射化学处理，以将沉积的锆（及其子体钇）从它们中分离出来。从铝、铜和金收集箔中获得的锆的总平均回收率分别为（91.3±8.9）%和（95.0±5.8）%，分别比以前的水相收获实验高三倍以上。固相同位素收获的实用性已被证明，可用于在近中性 pH 水相条件下容易水解的元素，如锆，也可用于 FRIB 从固体成分中收获。
