Intense ultrashort light pulses comprising merely a few wave cycles became routinely
available by the turn of the millennium. The technologies underlying their production and …

Double ionization following the absorption of a single photon is one of the most fundamental
processes requiring interaction between electrons,,. Information about this interaction is …

Understanding the interaction of intense, femtosecond X-ray pulses with heavy atoms is
crucial for gaining insights into the structure and dynamics of matter. One key aspect of …

As opposed to purely molecular systems where electron dynamics proceed only through
intramolecular processes, weakly bound complexes such as He droplets offer an …

Ionization of atoms and molecules in intense low-frequency fields is a multielectron process
which may leave the ion in different excited states. Within the adiabatic perspective on …

The recent development of double photoemission (DPE) spectroscopy at surfaces using
laser-based high-order harmonic generation in combination with time-of-flight electron …

We demonstrate the use of cold target recoil ion momentum spectroscopy to perform state-
selective measurements of the dissociative channels following single-photon double …

We report on the photon energy dependence of the K-shell double photoionization (DPI) of
Mg, Al, and Si. The DPI cross sections were derived from high-resolution measurements of x …

We investigate the single-photon double ionization of helium at photon energies of 440 and
800 eV. We observe doubly charged ions with close to zero momentum corresponding to …

Double photoelectron momentum spectra of the helium atom are calculated ab initio at
extreme ultraviolet and near-infrared wavelengths. At short wavelengths two-photon double …