Heidelberg 2015 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 6: Posters
MS 6.7: Poster
Dienstag, 24. März 2015, 17:00–19:00, C/Foyer
Absolute mass measurement of oxygen-16 at THe-Trap — •Tom Segal1, Tommi Eronen1, 2, Martin Höcker1, Jochen Ketter1, Marc Schuh1, Sebastian Streubel1, Robert S. Van Dyck Jr.3, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg — 2Department of Physics, University of Jyväskylä, P.O. Box 35, FI-40014 University of Jyväskylä, Finland — 3Department of Physics, University of Washington, Seattle, WA 98195-1560
THe-Trap is a Penning-trap mass spectrometer that aims to measure the atomic mass ratio of tritium to helium-3 with a relative uncertainty of 1·10−11. To test the experiment’s accuracy and precision, we measured the mass ratio of carbon-12 to oxygen-16, which is one of the most precisely determined mass ratios [1].
In 2014 we reported a measurement of this mass ratio with a relative uncertainty of 6.3·10−11 [2], which was limited by systematic effects. Since then we upgraded the experiment, including the ion source, the vacuum system, and the amplifier for the detection of the induced image current. Due to the improved ion storage times we were able to characterize the amplitude dependent systematic shifts [3] and reach a significantly lower uncertainty that approaches the uncertainty of the literature value.
[1] R. S. Van Dyck Jr. et al., Int. J. Mass Spectrom. (2006) 251:231–242
[2] S. Streubel et al., Appl. Phys. B (2014) 114: 137–145
[3] J. Ketter et al., Int. J. Mass Spectrom. (2014) 358: 1–16