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Berlin 2001 – scientific programme

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MS: Massenspektrometrie

MS I: HV I

MS I.1: Invited Talk

Monday, April 2, 2001, 15:45–16:15, EB 202

Advances in Accelerator Mass Spectrometry at sub-MeV Energies — •Martin Suter1, Max Döbeli2, Stefan Jacob1, Jürgen Scheer1, and Hans-Arno Synal21Institute of Particle Physics, ETH-Hönggerberg, CH-8093 Zürich — 2Paul Scherrer Institute, c/o ETH-Hönggerberg, CH-8093 Zürich

In recent years, significant progress has been made in the development of small and compact facilities for accelerator mass spectrometrie(AMS). These instruments are based on tandem accelerators operating at terminal voltages below 1 MV. Ions in charge state 1+ or 2+ are selected for the final analysis. In these low charge states, interfering molecules can have bound states. This background can be eliminated by destroying the molecules in ion-atom collision in the stripping process. This new method has first been developed and tested for radiocarbon. Meanwhile commericial instruments are available for 14C dating. Recent experiments indicate that this method is also applicable for the analysis of other radionuclides such as 26Al, 41Ca and 129I. A review of this new technique is given and the limitations are discussed.

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