Over the last 20 years, XUV and X-ray free-electron lasers have enabled a wide variety of
time-resolved experiments that have dramatically advanced our understanding of ultrafast …

The field of angle-resolved molecular photoelectron spectroscopy is reviewed, with
emphasis on foundations and most recent applications in different regimes of light–matter …

How long does it take to emit an electron from an atom? This question has intrigued
scientists for decades. As such emission times are in the attosecond regime, the advent of …

Inner-shell photoelectron spectroscopy provides an element-specific probe of molecular
structure, as core-electron binding energies are sensitive to the chemical environment. Short …

We report the development and performance of a cold target recoil ion momentum
spectrometer (COLTRIMS) setup at TIFR, which is built to study various atomic and …

The Small Quantum Systems instrument is one of the six operating instruments of the
European XFEL, dedicated to the atomic, molecular and cluster physics communities. The …

Double core-holes (DCHs) show remarkable and sensitive effects for understanding
electron correlations and coherence. With advanced modulation of x-ray free-electron laser …

Imaging ultrafast hydrogen migration with few-or sub-femtosecond time resolution is a
challenge for ultrafast spectroscopy due to the lightness and small scattering cross-section …

Imaging ultrafast atomic and molecular hydrogen motion with femtosecond time resolution is
a challenge for ultrafast spectroscopy due to the low mass and small scattering cross section …

A multichannel single center (MCSC) method for the theoretical description of the electron
continuum spectrum in molecules is reported. The method includes coupling between …