Speaker
Summary
Efficient chemical separation of 177Lu from enriched 176Yb targets is essential for producing high-purity radiopharmaceuticals. However, the chemical similarity of Yb and Lu complicates the process and increases operator exposure during hot-cell work. In this study, a compact CdZnTe (CZT) detector was applied for real-time γ-ray monitoring during extraction chromatography to optimize 177Lu recovery. An enriched 176Yb2O3 target (99.14%) was irradiated at 5 MW for 6 h in the Kyoto University Research Reactor and separated on an LN2-Resin column using 1.5 M HNO3. The elution profiles obtained with the CZT detector closely matched those measured with a high-resolution Ge detector, confirming successful separation of 175Yb and 177Lu. These results demonstrate that online CZT monitoring enables precise identification of 177Lu fractions, improves separation efficiency, and reduces radiation exposure in high-activity radiochemical operations.
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