Kavli Affiliate: Robert Rosner
| First 5 Authors: Robin Y. Engel, Robin Y. Engel, , ,

| Summary:
The pulse intensity from X-ray free-electron lasers (FELs) can create extreme excitation densities in solids, entering the regime of non-linear X-ray-matter interactions. We show L3-edge absorption spectra of metallic nickel thin films with fluences entering a regime where several X-ray photons are incident per absorption cross-section. Main features of the observed non-linear spectral changes are described with a predictive rate model for electron population dynamics during the pulse, utilizing a fixed density of states and tabulated ground-state properties.
| Search Query: arXiv Query: search_query=au:”Rosner Robert”&id_list=&start=0&max_results=3
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