Darmstadt 2008 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

SYWS: Fundamentale Wechselwirkungen und ihre Symmetrien

SYWS 2: Fundamental Interactions and their Symmetries II

SYWS 2.3: Invited Talk

Wednesday, March 12, 2008, 17:00–17:30, 1A/B/C

Highly-charged ions for high-precision Penning trap mass spectrometry — •Szilard Nagy — Institut für Physik, Johannes Gutenberg-Universität, 55099 Mainz, Germany

This contribution will give a detailed insight into the field of high-precision mass spectrometry employing a Penning Trap Mass Spectrometer (PTMS), where the main observable is the cyclotron frequency ν_c=qeB/(2π m) of an ion with charge-to-mass ratio q/m trapped in a homogeneous magnetic field B. The application of ions with multiple charges in high-precision mass spectrometry yields a distinct benefit due to an increased resolution ν_c/Δ ν_c.

Recent results will be presented mostly from the Penning trap mass spectrometer SMILETRAP with emphasis on results relevant for fundamental physics questions. Among the highlights are the most precise tritium beta decay Q-value [1], which is of importance in the search for a finite rest mass of the electron anti-neutrino; a newly evaluated ⁷⁶Ge double beta-decay Q-value [2] relevant in the search for neutrinoless double beta-decay (0ν β β); the masses of the lithium-like and hydrogen-like ⁴⁰Ca ions [3], which are indispensable input values when evaluating g-factor measurements of the bound electron in these ions.

Other Penning trap facilities dedicated to highly-charged ions will be discussed such as HITRAP at GSI Darmstadt.

References

[1] Sz. Nagy et al., Europhys. Lett. 74, 404 (2006)

[2] M. Suhonen et al., JINST 2, P06003 (2007)

[3] Sz. Nagy et al., Eur. Phys. J. D 39, 1 (2006)