Mainz 2017 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 7: Poster
MS 7.2: Poster
Wednesday, March 8, 2017, 17:00–19:00, P OG1
An experiment for high-precision mass measurements of the proton and the neutron — •Sascha Rau1, Fabian Heisse1,2, Sven Junck3, Florian Köhler-Langes1, 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 Initiative Research Unit, Saitama 351-0198, Japan
Protons and neutrons are the central building blocks of all nuclei. Measuring their properties, among others their atomic masses, is of continued interest for metrology and offers possibilities for precision tests.
We are presently setting up a new experiment consisting of a cryogenic Penning-trap system, which aims to measure mp and mn in atomic mass units with a relative uncertainty of δ m / m = 10−11 or better. This precision is achieved by comparing the simultaneously measured cyclotron frequencies of a proton or a deuteron, respectively, with a 12C6+-ion utilizing a phase-sensitve measurement technique, thus cancelling magnetic field fluctuations. The current status of the experiment, experimental methods, as well as first results will be presented.