The present status and recent developments in the theory of light hydrogenic atoms,
electronic and muonic, are extensively reviewed. The discussion is based on the quantum …

The comparison between theory and experiment of the hyperfine structure splitting and the
electronic gj factor in heavy highly charged ions provides a unique testing ground for …

Intense laser-matter interactions are at the center of interest in research and technology
since the development of high-power lasers. They have been widely used for fundamental …

We have measured the absolute frequency of the hydrogen 1 S− 2 S two-photon resonance
with an accuracy of 3.4 parts in 10 13 by comparing it with the 28 th harmonic of a methane …

A consistent, up-to-date description of the extremely manifold and varied experimental
techniques which nowadays enable work with neutral particles. Th book lays the physical …

Muonic hydrogen (μH) is a unique tool to study the low-energy properties of the proton form
factors. The energy levels of μH are very sensitive to QED, recoil, and proton finite-size …

We have performed a pure optical frequency measurement of the 2 S− 8 S/D two-photon
transitions in atomic hydrogen and deuterium. These frequencies are directly compared to a …

Proton structure effects, including finite size, polarizability, and self-energy are considered
and their influence on energy levels of muonic hydrogen is recalculated. A theoretical …

Darwin-Foldy nuclear-size corrections in electronic atoms and nuclear radii are discussed
from the nuclear-physics perspective. The interpretation of precise isotope-shift …

We present a detailed description of several experiments which have been previously
reported in several letters: the determination of the 1S Lamb shift in hydrogen by a …