The Electron Mass and Calcium Isotope Shifts

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

  • Florian Köhler-Langes

Part of the Springer Theses book series (Springer Theses)

Table of contents

  1. Front Matter
    Pages i-xiv
  2. Florian Köhler-Langes
    Pages 1-4
  3. Florian Köhler-Langes
    Pages 33-74
  4. Florian Köhler-Langes
    Pages 117-133
  5. Florian Köhler-Langes
    Pages 147-165
  6. Back Matter
    Pages 167-168

About this book


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

Authors and affiliations

  • Florian Köhler-Langes
    • 1
  1. 1.Department of Stored and Cooled IonsMax-Planck-Institut für Kernphysik HeidelbergGermany

Bibliographic information