Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 36: Highly Charged Ions and their Applications II
A 36.3: Talk
Friday, March 15, 2024, 11:45–12:00, HS 1010
Metastable state detection with Penning-trap mass spectrometry — •Kathrin Kromer1, Menno Door1, Pavel Filianin1, Zoltán Harman1, Jost Herkenhoff1, Paul Indelicato2, Christoph H. Keitel1, Daniel Lange1, Chunhai Lyu1, Yuri N. Novikov1, Christoph Schweiger1, Sergey Eliseev1, and Klaus Blaum1 — 1Max-Planck-Institut für Kernphysik, 69117 Heidelberg, — 2Laboratoire Kastler Brossel, Sorbonne Université, CNRS, Paris, France
The construction of clocks in the XUV has recently become possible due to the extension of the frequency comb method to this frequency range. In combination with the vast landscape of transitions in highly charged ions (HCIs) a next generation of ultra precise clocks has come within reach. However, the search for suitable clock transitions, e.g. involving long-lived metastable electronic states, usually relies heavily on complicated atomic structure calculations.
With the Penning-trap mass spectrometer Pentatrap, we can discover long-lived metastable states and measure their energies without actively driving the transition and therefore being independent of theoretical predictions. With this method we have measured a metastable state energy in Pb as a mass difference of just 31.2(0.8) eV on top of the mass of the lead nuclei of ≈194 GeV, making it one of the most precise mass determination to date with a relative uncertainty of 4× 10−12 [K. Kromer et al., Phys. Rev. Lett., in print (2023)]. It is thereby possible to benchmark atomic structure calculations in open-shell HCI.
Keywords: Mass spectrometry; Penning trap