Sang-Kil and Huijong's publications

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BibTeX file of [Budewig24a] [show it without abstract]

@article{Budewig24a, author={Laura Budewig and Sang-Kil Son and Robin Santra}, title={Electron-cloud alignment dynamics induced by an intense X-ray free-electron laser pulse: a case study on atomic argon}, journal={Commun. Phys.}, volume={7}, pages={363}, year={2024}, keywords={Ar; alignment; x-ray multiphoton ionization; state-resolved; ionization dynamics; XATOM; CFEL; DESY;}, note={special issue: Ultrafast X-ray Spectroscopy}, url={https://doi.org/10.1038/s42005-024-01852-x}, doi={10.1038/s42005-024-01852-x}, abstract={In an intense X-ray free-electron laser (XFEL) pulse, atoms are sequentially ionised by multiple X-ray photons. Photoionisation generally induces an alignment of the electron cloud of the produced atomic ion regarding its orbital-angular-momentum projections. However, how the alignment evolves during sequential X-ray multi-photon ionisation accompanied by decay processes has been unexplored. Here we present a theoretical prediction of the time evolution of the electron-cloud alignment of argon ions induced by XFEL pulses. To this end, we calculate state-resolved ionisation dynamics of atomic argon interacting with an intense linearly polarised X-ray pulse, which generates ions in a wide range of charge states with non-zero orbital- and spin-angular momenta. Employing time-resolved alignment parameters, we predict the existence of non-trivial alignment dynamics during intense XFEL pulses. This implies that even if initially the atomic electron cloud is perfectly spherically symmetric, X-ray multi-photon ionisation can lead to noticeable reshaping of the electron cloud.} }

Laura Budewig, Sang-Kil Son, and Robin Santra, Electron-cloud alignment dynamics induced by an intense X-ray free-electron laser pulse: a case study on atomic argon, Commun. Phys. 7, 363 (2024) [special issue: Ultrafast X-ray Spectroscopy]

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[abstract]

doi:10.1038/s42005-024-01852-x