Hannover 2010 – scientific programme

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SYPS: Symposium Precision spectroscopy of highly ionized matter

SYPS 1: Precision spectroscopy of highly ionized matter I

SYPS 1.2: Invited Talk

Friday, March 12, 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 ν_c of a charged particle in a magnetic field B, increases linearly with the charge q according to ν_c=qB/(2 π m), leading to a potentially large gain in the relative precision δ ν_c / ν_c 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.