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Operations Research, Systems Engineering and Industrial Engineering Commons

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Nuclear Engineering

University of Pennsylvania

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Novel Technique For Ultra-Sensitive Determination Of Trace Elements In Organic Scintillators, Zelimir Djurcic, D. Glasgow, Lin-Wen Hu, R.D. Mckeown, Andreas Piepke, Robert Swinney, B. Tipton Jul 2003

Novel Technique For Ultra-Sensitive Determination Of Trace Elements In Organic Scintillators, Zelimir Djurcic, D. Glasgow, Lin-Wen Hu, R.D. Mckeown, Andreas Piepke, Robert Swinney, B. Tipton

Operations, Information and Decisions Papers

A technique based on neutron activation has been developed for an extremely high sensitivity analysis of trace elements in organic materials. Organic materials are sealed in plastic or high-purity quartz and irradiated at the HFIR and MITR. The most volatile materials such as liquid scintillator (LS) are first preconcentrated by clean vacuum evaporation. Activities of interest are separated from side activities by acid digestion and ion exchange. The technique has been applied to study the liquid scintillator used in the KamLAND neutrino experiment. Detection limits of <2.4×10−15 g 40K/g LS, <5.5×10−15 g Th/g LS, and <8×10−15 g ...