Ultrafast X-ray probes of elementary molecular events

D Keefer, SM Cavaletto, JR Rouxel… - Annual Review of …, 2023‏ - annualreviews.org
Elementary events that determine photochemical outcomes and molecular functionalities
happen on the femtosecond and subfemtosecond timescales. Among the most ubiquitous …

Time-resolved experiments on gas-phase atoms and molecules with XUV and X-ray free-electron lasers

D Rolles - Advances in Physics: X, 2023‏ - Taylor & Francis
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 …

Step-by-step state-selective tracking of fragmentation dynamics of water dications by momentum imaging

T Severt, ZL Streeter, W Iskandar, KA Larsen… - Nature …, 2022‏ - nature.com
The double photoionization of a molecule by one photon ejects two electrons and typically
creates an unstable dication. Observing the subsequent fragmentation products in …

Filming enhanced ionization in an ultrafast triatomic slingshot

AJ Howard, M Britton, ZL Streeter, C Cheng… - Communications …, 2023‏ - nature.com
Filming atomic motion within molecules is an active pursuit of molecular physics and
quantum chemistry. A promising method is laser-induced Coulomb Explosion Imaging (CEI) …

Molecular photodissociation dynamics revealed by Coulomb explosion imaging

SW Crane, JWL Lee, MNR Ashfold… - Physical Chemistry …, 2023‏ - pubs.rsc.org
Coulomb explosion imaging (CEI) methods are finding ever-growing use as a means of
exploring and distinguishing the static stereo-configurations of small quantum systems …

[HTML][HTML] The beam transport system for the Small Quantum Systems instrument at the European XFEL: optical layout and first commissioning results

T Mazza, TM Baumann, R Boll, A De Fanis… - Synchrotron …, 2023‏ - journals.iucr.org
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 …

Alternative pathway to double-core-hole states

I Ismail, A Ferté, F Penent, R Guillemin, D Peng… - Physical review …, 2023‏ - APS
Excited double-core-hole states of isolated water molecules resulting from the sequential
absorption of two x-ray photons have been investigated. These states are formed through an …

The role of momentum partitioning in covariance ion imaging analysis

T Walmsley, JW McManus, Y Kumagai… - The Journal of …, 2024‏ - ACS Publications
We present results from a covariance ion imaging study, which employs extensive filtering,
on the relationship between fragment momenta to gain deeper insight into …

Sequential mechanism in H 3+ formation dynamics on the ethanol dication

K Gope, DM Bittner, D Strasser - Physical Chemistry Chemical Physics, 2023‏ - pubs.rsc.org
Two-and three-body Coulomb explosion dynamics of isolated ethanol dications are studied
via single-photon double-ionization with ultrafast extreme-ultraviolet pulses. The measured …

Machine-learning calibration of intense x-ray free-electron-laser pulses using Bayesian optimization

N Breckwoldt, SK Son, T Mazza, A Rörig, R Boll… - Physical review …, 2023‏ - APS
X-ray free-electron lasers (XFELs) have brought new ways to probe and manipulate atomic
and molecular dynamics with unprecedented spatial and temporal resolutions. A …