Abstract
The current status of sample preparation activities and AMS determination of 129II ratios are described. Determination of 129II ratios is being performed routinely at the precision of 3% (at 10−11 level). A system background of 20−80 × 10−15 of 129II ratio has been achieved without a time-of-flight (TOF) detector and without a low-energy electrostatic deflector. An intercomparison of 129II ratios for AgI samples obtained from other AMS facilities and for the round robin exercise by the International Atomic Energy Agency (IAEA) show an excellent agreement. Potential applications of 129I for tracing groundwater and ocean water are discussed.
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