Mainz 2017 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 6: Accelerator Mass Spectrometry and Applications I

MS 6.7: Vortrag

Mittwoch, 8. März 2017, 16:15–16:30, RW 2

Quasi simultaneous measurements of ²³⁶U/²³⁸U ratios on the compact ETH Zurich Tandy AMS system — •Marcus Christl, Christof Vockenhuber, Sascha Maxeiner, Núria Casacuberta, Jürg Thut, and Hans-Arno Synal — Laboratory of Ion Beam Physics, ETH Zurich, Switzerland

Measurements of actinides with the compact 0.5 MV AMS system Tandy at ETH Zurich have become routine over the past years. With more than 200 samples analyzed per year (2012-2016), ²³⁶U currently represents the most important actinide nuclide measured at ETHZ. Very recently new, small Faraday Cups (FC) with an opening of 8x12 mm² have been developed and installed at the HE side of the Tandy AMS system. With the new FCs it is now possible to perform quasi simultaneous measurements of ²³⁶U/²³⁸U ratios using the standard fast pulsing system. In this presentation the design of the FCs, the concept of the new AMS setup for ²³⁶U/²³⁸U and ²³⁶U/²³³U measurements, as well as the performance of the new FCs is presented. In addition to the technical part, new data from the ongoing oceanographic mapping program of ²³⁶U (and ¹²⁹I) as well as the status of an intercalibration effort for ²³⁶U will be presented.