Detailed information about atomic excitation and decay processes are urgently required in many research fields in physics, science and elsewhere, from astro physics to (atomic) spectroscopy and metrology, to the development of light sources, and up to material science, to recall just a few of them [1]. More often than not, this information need to be obtained from atomic computations that are...
The electronic structure of liquid water and aqueous solutions is directly accessible by liquid-jet photoelectron spectroscopy (LJ-PES). Energies of photoelectron spectral features have so far typically been referenced to the vacuum-energy level, i.e., in relation to the gas phase, which per definition disregards explicit surface properties such as the work function of aqueous solutions. We...
When two electrons are excited far away from the nucleus, their motion results from the subtle balance between electronic repulsion and the Coulomb attraction of the residual ion. The strong electron correlations give rise to complex and fascinating two-electron dynamics that range from chaotic motion to quasi-stable orbits associated with sharp resonances. We report the experimental and...
Recent astronomical observations [1,2] have shown that chloronium (H$_2$Cl$^+$) is an important intermediate in Cl-chemistry of the interstellar medium (ISM) due to its specific thermodynamic properties. For a proper interpretation of the astronomical observations, radiative transfer modelling is required that takes into account the non-local thermodynamic equilibrium (non-LTE) effects of...
