Recent developments in frequency metrology and optical clocks have been based on
electronic transitions in atoms and singly charged ions as references. The control over all …

Optical atomic clocks are the most accurate measurement devices ever constructed and
have found many applications in fundamental science and technology,–. The use of highly …

Nuclear ground state properties including mass, charge radii, spins and moments can be
determined by applying atomic physics techniques such as Penning-trap based mass …

Control over the motional degrees of freedom of atoms, ions, and molecules in a field-free
environment enables unrivalled measurement accuracies but has yet to be applied to highly …

Electron beam ion traps (EBITs) are ideal tools for both production and study of highly
charged ions (HCIs). In order to reduce their construction, maintenance, and operation costs …

We report on the successful demonstration of a novel scheme for detecting optical
transitions in highly charged ions. We applied it to determine the frequency of the dipole …

We demonstrate resonant fluorescence laser spectroscopy in highly charged ions (HCI)
stored in an electron beam ion trap by investigating the dipole-forbidden 1 s 2 2 s 2 2 p P 3/2 …

We present an experimental concept and setup for laser-microwave double-resonance
spectroscopy of highly charged ions in a Penning trap. Such spectroscopy allows a highly …

The relativistic recoil effect has been the object of experimental investigations using highly
charged ions at the Heidelberg electron beam ion trap. Its scaling with the nuclear charge Z …

We study various properties of the 2 p P 1/2 2− 2 p P 3/2 2 fine-structure splittings in the
boronlike S 11+, Cl 12+, Ar 13+, and K 14+ ions and the 4 p P 1/2 2− 4 p P 3/2 2 fine …