Abstract
Diamond irradiated with an intense femtosecond X-ray free-electron laser (XFEL) pulse is studied theoretically. The modeling is performed with the help of recently developed hybrid approach XTANT. The model includes processes of initial X-ray photon absorption resulting in photoelectron excitation, secondary electron cascades, Auger decays of K-shell holes, energy exchange between electron and atoms (electron-phonon coupling), nonthermal evolution of the atomic potential energy surface, atomic dynamics, and phase transitions. The results show that time-resolved graphitization of diamond irradiated with 24-keV photon energy pulses, as planned to be delivered at the European XFEL, takes slightly longer in comparison to the case of soft-X-ray irradiation.
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Acknowledgements
The author thanks Libor Juha, Zheng Li, Vladimir Lipp, Victor Tkachenko, and Beata Ziaja for valuable discussions. Partial financial support from the Czech Ministry of Education (Grants LTT17015 and LM2015083) is acknowledged.
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Medvedev, N. (2020). Modeling Diamond Irradiated with a European XFEL Pulse. In: Kozlová, M., Nejdl, J. (eds) X-Ray Lasers 2018. ICXRL 2018. Springer Proceedings in Physics, vol 241. Springer, Cham. https://doi.org/10.1007/978-3-030-35453-4_21
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DOI: https://doi.org/10.1007/978-3-030-35453-4_21
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