Over the past decade or so, the state-of-the-art in the field of chemical reaction dynamics has
progressed from studies of few-atom systems to wide-ranging investigations into a variety of …

The free-electron laser in Hamburg, FLASH, is the first extreme ultra-violet and soft X-ray
free-electron laser (FEL) user facility and has been continuously upgraded since its start in …

Naphthalene and azulene are isomeric polycyclic aromatic hydrocarbons (PAHs) and are
topical in the context of astrochemistry due to the recent discovery of substituted …

We have studied soft-x-ray absorption in coronene and in singly hydrogenated coronene
cations. Hydrogenation on the one hand closes the singly occupied molecular orbital of the …

We report on the use of extreme ultraviolet (XUV, 30.3 nm) radiation from the Free-electron
LASer in Hamburg (FLASH) and visible (Vis, 405 nm) photons from an optical laser to …

We describe astra (attosecond transitions), a close-coupling approach to molecular
ionization that uses many-body transition-density matrices between ionic states with …

The primary and secondary fragmentation dynamics of iodobenzene following its ionization
at 120 eV were determined using three-dimensional velocity map imaging and covariance …

We present the first experimental application of coherent Raman spectroscopy (CRS) on the
ro-vibrational ν2 mode spectrum of methane (CH4). Ultrabroadband femtosecond …

Ultrafast pump–probe spectroscopic studies allow for deep insights into the mechanisms
and timescales of photophysical and photochemical processes. Extracting valuable …

Following ionization by an extreme ultraviolet (XUV) attosecond pulse train, a polyatomic
molecule can be promoted to more-than-one excited states of the residual ion. The ensuing …