Berlin 2014 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 2: Precision Mass Spectrometry 1/ RIMS

MS 2.6: Vortrag

Montag, 17. März 2014, 15:30–15:45, DO24 1.205

Status of the ILIAS project for selective isobar suppression by Laser photodetachment — •Oliver Forstner1,2, Pontus Andersson3, Robin Golser1, Dag Hanstorp4, Johannes Lahner1, Martin Martschini1, Alfred Priller1, and Peter Steier11VERA Laboratory, Faculty of Physics, University of Vienna, Austria — 2Stefan-Meyer-Institut, Austrian Academy of Sciences, Vienna, Austria — 3Department of Earth and Space Sciences, Chalmers University of Technology, Sweden — 4Department of Physics, University of Gothenburg, Sweden

The ILIAS setup (Ion Laser InterAction Setup) at the University of Vienna provides mass separated beams of negative ions with energies up to 30~keV. It was constructed to study Laser photodetachment of negative ions and evaluate its applicability for selective isobar suppression in mass spectrometry. The negative ions are produced in a Middleton type cesium sputter ion source, mass selected and stopped in a gas-filled radio frequency quadrupole cooler where they can be overlapped with a strong continuous wave Laser beam. By careful selection of the photon energy only unwanted isobars are neutralized while the isobar of interest remain as ions.

After a description of the setup first photodetachment experiments of atomic and molecular ions with the RFQ cooler are presented. Furthermore, a possible scheme for application of this new method to a 3~MV AMS facility will be described.

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