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Schlagwörter:
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MPINP:
Präzisionsexperimente - Abteilung Blaum
Zusammenfassung:
THe-Trap is a Penning-trap mass spectrometer at the Max-Planck-Institute for Nuclear
Physics in Heidelberg, Germany, that aims to measure the T3He mass ratio with a relative
uncertainty of 10-11. Improvements of the measurement technique, in particular the measurement
of systematic shifts, enabled measurements of mass ratios with relative uncertainties of
7 ・ 10-11, as demonstrated by a cyclotron frequency ratio determination on 12C4+16O5+. This
uncertainty was limited by the lineshape. An improved theoretical model based on a rotating
wave approximation can be used to describe dynamical interactions between the detection
system and the ion, in order to better understand the lineshape and to further reduce the
uncertainty.
The Florida State University trap is a Penning-trap mass spectrometer located in Tallahassee,
Florida (USA). In the context of this thesis, three mass ratios were measured, and further
20 mass ratio measurements analyzed, which resulted in the publication of the masses of 82,83Kr,
131,134Xe, 86-88Sr, and 170−174,176Yb with relative uncertainties between (0.9 − 1.3) ・ 10-10.
These masses serve as reference masses for other experiments and have applications in the
determination of the fine-structure constant α via the photon-recoil method.
