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Time resolved core level photoemission (trXPS) allows real-time atom-specific investigation of ultrafast surface dynamics. Core levels contain information on the chemical state and the structure of the surface as well as the local charge distribution around specific atoms. Monitoring their evolution after optically exciting the surface, can give valuable information on the electronic (few picosecond...
We present density functional theory modeling of time-resolved optical pump/X-ray spectroscopic probe data of CO desorption from Ru(0001). The BEEF van der Waals functional predicts a weakly bound state as a precursor to desorption. The optical pump leads to a near-instantaneous (<100fs) increase of the electronic temperature to nearly 7000K. The temperature evolution and energy transfer between...
We report on an experimental system designed to probe chemical reactions on solid surfaces on a sub-picosecond timescale using soft X-ray emission spectroscopy at the Linac Coherent Light Source (LCLS) free electron laser (FEL) at the SLAC National Accelerator Laboratory. We analyzed the O 1s X-ray emission spectra recorded from atomic oxygen adsorbed on a Ru(0001) surface at a synchrotron beamline...
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