Heidelberg 2015 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 8: Accelerator Mass Spectrometry and Applications 1
MS 8.2: Vortrag
Mittwoch, 25. März 2015, 15:00–15:15, PH/HS2
Isobar suppression of MgO− vs. AlO− by laser photodetachment — •Martin Martschini1, Pontus Andersson2, Oliver Forstner3, Dag Hanstorp4, Yuan Liu5, Tobias Moreau1, Johanna Pitters1, Alfred Priller1, Peter Steier1, and Robin Golser1 — 1VERA Laboratory, University of Vienna, Faculty of Physics, Austria — 2Earth and Space Sciences Department, Chalmers University of Technology, Gothenburg, Sweden — 3Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Jena, Germany — 4Department of Physics, University of Gothenburg, Sweden — 5ORNL Oak Ridge National Laboratory, Tennessee, USA
The Ion Laser Interaction Setup ILIAS at the VERA Laboratory of the University of Vienna is fully operational since November 2014. A gas-filled radio frequency quadrupole is used to decelerate negative ions from a cesium sputter source and to study isobar suppression by selective laser photodetachment for future AMS purpose.
With a 532nm laser, we recently achieved a suppression of MgO− ions by more than 4 orders of magnitude at only 15% reduction in AlO−. This may pave the way for the use of the much more intense oxide beams for Al injection during 26Al AMS, which currently suffers from the poor ion yield of Al−. Following the discussion of these experimental results, we will also present the layout of the new injector at VERA that will allow to couple the ion cooler to a state-of-the-art AMS facility.