학술논문
Electron Dynamics at High-Energy Densities in Nickel from Non-linear Resonant X-ray Absorption Spectra
Document Type
Working Paper
Author
Engel, Robin Y.; Alexander, Oliver; Atak, Kaan; Bovensiepen, Uwe; Buck, Jens; Carley, Robert; Cascella, Michele; Chardonnet, Valentin; Chiuzbaian, Gheorghe Sorin; David, Christian; Döring, Florian; Eschenlohr, Andrea; Gerasimova, Natalia; de Groot, Frank; Guyader, Loïc Le; Humphries, Oliver S.; Izquierdo, Manuel; Jal, Emmanuelle; Kubec, Adam; Laarmann, Tim; Lambert, Charles-Henri; Lüning, Jan; Marangos, Jonathan P.; Mercadier, Laurent; Mercurio, Giuseppe; Miedema, Piter S.; Ollefs, Katharina; Pfau, Bastian; Rösner, Benedikt; Rossnagel, Kai; Rothenbach, Nico; Scherz, Andreas; Schlappa, Justine; Scholz, Markus; Schunck, Jan O.; Setoodehnia, Kiana; Stamm, Christian; Techert, Simone; Vinko, Sam M.; Wende, Heiko; Yaroslavtsev, Alexander A.; Yin, Zhong; Beye, Martin
Source
Subject
Language
Abstract
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.
Comment: The main text contains 5 pages and 4 figures, the total length including supplement is 14 pages, 7 figures and one table. See also the simultaneously submitted paper about the rate model
Comment: The main text contains 5 pages and 4 figures, the total length including supplement is 14 pages, 7 figures and one table. See also the simultaneously submitted paper about the rate model