SAMOP 2023 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 4: Heavy and Superheavy Elements

MS 4.6: Vortrag

Donnerstag, 9. März 2023, 12:45–13:00, F128

Relativistic calculation of binding energies of highly charged ions for precision mass spectroscopy — •Zoltán Harman, Chunhai Lyu, Vincent Debierre, and Christoph H. Keitel — Max Planck Institute for Nuclear Physics, Heidelberg

Penning-trap mass spectrometry has recently enabled a novel determination of electron binding energies through the comparison of ionic masses. The collaboration of experiment and our multiconfiguration Dirac-Hartree-Fock theory has enabled the discovery of ultra-narrow ionic transitions, suitable for constructing future atomic clocks: in the Re 29+ ion, a long-lived electronic state with an excitation energy of 202 eV was observed via the mass difference of excited and ground-state ions [1]. A further application of such investigations is the determination of the Q value of the beta decay of various atomic isotopes, relevant for the determination of the neutrino mass [2]: experimentally, the masses of Re and Os ions could be determined to high precision, and our calculations have delivered the accurate binding energies of the electrons missing from the neutral atoms. Finally, mass spectrometry has largely contributed to a comparison of the magnetic moments of two isotopically different neon ions, allowing to set upper bounds on the coupling strength of new scalar bosons that might mediate a hypothetical interaction between electrons and nucleons [3]. -- [1] R. X. Schüssler, et al., Nature 581, 42 (2020); [2] P. E. Filianin, et al., Phys. Rev. Lett. 127, 072502 (2021); [3] T. Sailer et al., Nature 606, 479 (2022).