Erlangen 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MS: Fachverband Massenspektrometrie
MS 10: Poster 2
MS 10.3: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Orangerie
An improved value of the proton’s atomic mass — •Fabian Heiße1,2, Florian Köhler-Langes1, Sascha Rau1, Jiamin Hou1, Sven Junck3, Anke Kracke1, Andreas Mooser4, Wolfgang Quint2, Stefan Ulmer4, Günter Werth3, Klaus Blaum1, and Sven Sturm1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany — 3Institut für Physik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany — 4RIKEN, Ulmer Fundamental Symmetries Laboratory, Wako, Saitama 351-0198, Japan
The proton is a central building block of the visible universe. The precise knowledge of its properties is of great interest for tests of fundamental physics and metrology.
To measure the proton’s mass in natural units, a new cryogenic five-fold Penning-trap setup was constructed. The measurement principle is based on a phase-sensitive comparison of the proton’s cyclotron frequency to that of a bare carbon nucleus (12C6+) in a highly harmonic and purpose-built Penning trap.
The setup as well as the proton’s atomic mass will be presented. The result improves the current literature value by a factor of 3 and reveals a disagreement of about 3 standard deviations to it [1].
F. Heiße et al., Phys. Rev. Lett. 119, 033001 (2017)