In this overview, I will briefly explore some of the basic concepts and observable effects in X-
ray photoelectron spectroscopy, including references to some key first publications, as well …

One of the most significant developments in computational atomic and molecular physics in
recent years has been the introduction of B-spline basis sets in calculations of atomic and …

Autoionization is an important pathway for the relaxation of electronically excited states. In
weakly bonded matter, efficient autoionization channels have been found, in which not only …

Although valence electrons are clearly delocalized in molecular bonding frameworks,
chemists and physicists have long debated the question of whether the core vacancy …

Because of inversion symmetry and particle exchange, all constituents of homonuclear
diatomic molecules are in a quantum mechanically non-local coherent state; this includes …

Resonant inelastic x-ray scattering (RIXS) is a major method for investigation of electronic
structure and dynamics, with applications ranging from basic atomic physics to materials …

We have measured the angular distributions of 1 s photoelectrons excited by circularly and
linearly polarized light from fixed-in-space CO and N 2 molecules, in the vicinity of their …

The x-ray absorption spectrum of N 2+ in the K-edge region has been measured by
irradiation of ions stored in a cryogenic radio frequency ion trap with synchrotron radiation …

In molecular double-slit experiments, the interference between emitted core electrons of
diatomic molecules gives rise to oscillations in the observed electron intensity. Here, we …

Natural line widths are measurable fundamental quantities of quantum states that, in atoms
and molecules, characterize the lifetime of the electronic states and therefore carry …