# The Electron Mass and Calcium Isotope Shifts

## High-Precision Measurements of Bound-Electron g-Factors of Highly Charged Ions

Part of the Springer Theses book series (Springer Theses)

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Part of the Springer Theses book series (Springer Theses)

This thesis presents the first isotope-shift measurement of bound-electron g-factors of highly charged ions and determines the most precise value of the electron mass in atomic mass units, which exceeds the value in the literature by a factor of 13. As the lightest fundamental massive particle, the electron is one of nature’s few central building blocks. A precise knowledge of its intrinsic properties, such as its mass, is mandatory for the most accurate tests in physics - the Quantum Electrodynamics tests that describe one of the four established fundamental interactions in the universe. The underlying measurement principle combines a high-precision measurement of the Larmor-to-cyclotron frequency ratio on a single hydrogen-like carbon ion studied in a Penning trap with very accurate calculations of the so-called bound-electron g-factor. Here, the g-factors of the valence electrons of two lithium-like calcium isotopes have been measured with relative uncertainties of a few 10^{-10}, constituting an as yet unrivaled level of precision for lithium-like ions. These calcium isotopes provide a unique system across the entire nuclear chart to test the pure relativistic nuclear recoil effect.

Precision Atomic Physics Electron Mass Precision Measurement Isotope Shift Precision Measurement Bound-electron G-factor Penning Trap Hydrogen-like Carbon Lithium-like Calcium Isotopes

- DOI https://doi.org/10.1007/978-3-319-50877-1
- Copyright Information Springer International Publishing AG 2017
- Publisher Name Springer, Cham
- eBook Packages Physics and Astronomy
- Print ISBN 978-3-319-50876-4
- Online ISBN 978-3-319-50877-1
- Series Print ISSN 2190-5053
- Series Online ISSN 2190-5061
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