Stuttgart 2012 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 6: Poster
MS 6.3: Poster
Dienstag, 13. März 2012, 16:30–19:00, Poster.IV
Mass measurements of 82,83Kr — •Martin Höcker1,2, Klaus Blaum1, and Edmund G. Myers2 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2Department of Physics, Florida State University, Tallahassee, 32306-4350, USA
In 2005, The Florida State University Precision Penning Trap group made mass measurements of 84,86Kr and 129,132Xe, which revealed a three sigma deviation to the previously adopted value of the mass of 84Kr [1,2]. Because noble gases can serve as readily available reference masses for a wide range of mass spectrometers, the group concurred to measure two more krypton isotopes, 82,83Kr, to cross-check whether similiar deviations are present in these isotopes as well, and to provide state-of-the-art reference mass values for all major krypton isotopes.
The measurements were carried out in the FSU/MIT-trap, which currently provides the most accurate mass ratios for stable, low-charged atomic and molecular ions. The measurement technique uses two single ions in the trap simultaneously, with the ions alternately being parked on a large cyclotron orbit and measured in the center of the trap with the pulse-and-phase technique.
The new measurements are presented and an overview of the statistical and systematic limitations is given.
This work was supported by the U.S. National Science Foundation.
[1] W. Shi et al., Physical Review A 72 022510 (2005)
[2] M. Redshaw et al., Physical Review A 74 012506 (2009)