Hannover 2016 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 2: Precision Mass Spectrometry and Fundamental Applications II
MS 2.2: Vortrag
Montag, 29. Februar 2016, 15:00–15:15, f128
A high-precision experiment for the determination of the proton mass — •Fabian Heisse1,2, Jiamin Hou1, Florian Köhler-Langes1, Andreas Mooser3, Wolfgang Quint2, Günter Werth4, Klaus Blaum1, Stefan Ulmer3, and Sven Sturm1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany — 2GSI-Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany — 3RIKEN Ulmer Initiative Research Unit, Hirosawa, Wako, Saitama 351-0198, Japan — 4Institut für Physik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany
The proton, together with the electron and the neutron, form the central building blocks of the visible universe. The precise knowledge of its properties, among others its atomic mass, is of great interest for high-precision tests as well as for metrology.
Therefore, a new experiment consisting of a cryogenic fivefold Penning-trap setup is built up in our group for the determination of the proton mass with improved accuracy. The measurement principle is based on a simultaneous phase-sensitive comparison of the proton’s cyclotron frequency to that of a bare carbon (12C6+) nucleus. With this new setup it is planned to pin down the atomic mass of the proton with a relative uncertainty as low as 10−11 or better. The status of the experiment and the experimental setup will be presented.