X-ray pump - X-ray probe diffraction signals from molecules

by Dr Jeremy Rouxel (Argonne, National Laboratory, IL, USA)

Thursday 6 Jun 2024, 16:00 → 17:00 Europe/Berlin

CFEL Seminar Room I-III (DESY Campus Building 99)

The availability of ultrashort X-ray pulses allows for conducting X-ray diffraction experiments with femtosecond temporal resolution. It was recognized early that ultrafast X-ray diffraction signals are more complex than their static counterparts due to contributions from populations and coherences of various electronic states.

A formulation based on the density matrix to describe ultrafast X-ray diffraction signals will be discussed first. Simulations will be presented on 1) azobenzene photoexcited by an optical pump pulse and 2) a Zn-Ni porphyrin dimer solvated in water with a stimulated Raman X-ray pump.

 

Zoom details:

https://xfel.zoom.us/j/94817560154?pwd=ejNSUnZTZzV4cXhvblpCWlZaQnVKQT09

 

Meeting ID: 948 1756 0154

Passcode: 339019