Berlin 2014 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 10: Accelerator Mass Spectrometry and Applications 3

MS 10.1: Hauptvortrag

Donnerstag, 20. März 2014, 16:30–17:00, DO24 1.205

Towards a compact multi isotope AMS system - status and applications — •Marcus Christl, Sascha Maxeiner, Johannes Lachner, Christof Vockenhuber, Arnold Müller, Nuria Casacuberta, and Hans-Arno Synal — Laboratory of Ion Beam Physics, ETH Zurich, Otto-Stern-Weg 5, 8093 Zurich, Switzerland

During recent years, significant progress has been made towards more efficient detection of light and heavy ions at low energies. The application of He gas in the stripping process, where negative ions are transformed into positive, provides high yields for comparably low charge states. Additionally, scattering losses of the ion beam are minimized due to the low nuclear charge of He. The combination of these effects generally allows the construction of a compact multi-isotope system operating at 300 kV that is capable of ultra-trace analyses of heavy ions. This presentation will give an overview about the status of all nuclides currently measured at the 0.5 MV ETH AMS system Tandy and discuss the potential of a compact multi-isotope AMS system operated by a conventional 300 kV power supply. Recent projects will be highlighted from different fields of applications including Pu samples from Fukushima, ¹²⁹I, ²³⁶U, and Pu isotopes in the North Atlantic Ocean, and the higher actinides in human urine samples.