Hannover 2010 – wissenschaftliches Programm
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SYPS: Symposium Precision spectroscopy of highly ionized matter
SYPS 1: Precision spectroscopy of highly ionized matter I
SYPS 1.2: Hauptvortrag
Freitag, 12. März 2010, 11:30–12:00, A 001
Penning trap mass spectrometry with highly charged ions — •Szilard Nagy — Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany — GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
The application of ions with multiple charges in high-precision Penning trap mass spectrometry has a major benefit. The measurable quantity, i.e. the cyclotron frequency νc of a charged particle in a magnetic field B, increases linearly with the charge q according to νc=qB/(2 π m), leading to a potentially large gain in the relative precision δ νc / νc of the measurement. Results from the SMILETRAP Penning trap mass spectrometer for highly charged ions will be reviewed with emphasis on fundamental physics questions. Among the highlights are: a newly evaluated 76Ge double beta-decay Q-value relevant for the search of neutrinoless double beta-decay; the most precise tritium beta-decay Q-value, which is of importance in the search for a finite rest mass of the electron anti-neutrino; the masses of the lithium-like and hydrogen-like 40Ca ions, which are indispensable input values for the evaluation of g-factor measurements of the bound electron in these ions, and bound state QED tests. New Penning trap facilities dedicated to highly charged ions will be discussed, such as HITRAP at GSI Darmstadt or the PENTA-TRAP high-precision Penning trap mass spectrometer at the Max Planck Institute for Nuclear Physics in Heidelberg.