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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...
Ultrahigh spectral brightness femtosecond XUV and X-ray sources like free electron lasers (FEL) and table-top high harmonics sources (HHG) offer fascinating experimental possibilities for analysis of transient states and ultrafast electron dynamics. For electron spectroscopy experiments using illumination from such sources, the ultrashort high-charge electron bunches experience strong space–charge...
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