Oughton, DFifield, L KeithDay, J PCresswell, Richarddi Tada, M.Salbu, BritStrand, PerDrozcho, EugenyMokrov, Yuri2015-12-130013-936Xhttp://hdl.handle.net/1885/90083Accelerator mass spectrometry (AMS) has been used to measure Pu activities and 240Pu/239Pu isotope ratios in samples contaminated by releases from the Mayak nuclear installation. Determination of Pu isotopes in high-level samples indicated that the ratioKeywords: Contamination; Discharge (fluid mechanics); Mass spectrometry; Nuclear energy; Radioactive wastes; Radioactivity measurement; Radioisotopes; Rivers; Water pollution; Accelerator mass spectrometry; Waste discharges; Plutonium; plutonium 240; article; envir200010.1021/es990847z2015-12-12