Abstract
Dynamic spatial hole localization and symmetry breaking phenomena are examined. Absorption of X-ray synchrotron and free-electron–laser radiation in matter is accompanied by strong dynamic corehole localization and temporary trap of the electron ejected from a deep level within the finite size potential barrier. As a result the symmetry of core excited states is reduced in comparison with ground state as the inversion symmetry is being broken. This is a very general property of coreexcited polyatomic compounds with equivalent atoms as their equivalence implies their equal probability of excitation averaged over large timescale but not simultaneous core excitation. Different approaches to rationalizing the symmetry breaking phenomena are presented and discussed with the emphasis on the quasiatomic dynamic corehole localization model. By examining the experimental ultrafast probe of photoabsorption processes we demonstrate an important role of spatio-temporal (nanometric-femtosecond) dynamically localized coreexcited moieties in molecule, clusters and solids. The photoelectron angular distributions from N and O 1s levels in fixed-in-space N2 and CO2 molecules, the photoelectron induced rotational heating of N2, the Auger decay spectra of N2 and the near S 1s edge X-ray absorption fine structure of free SF6 molecules are discussed in more detail.
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Translated from Sovremennaya Matematika. Fundamental’nye Napravleniya (Contemporary Mathematics. Fundamental Directions), Vol. 48, Proceedings of the Sixth International Conference on Differential and Functional Differential Equations and International Workshop “Spatio-Temporal Dynamical Systems” (Moscow, Russia, 14–21 August, 2011). Part 4, 2013.
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Klyushina, E.S., Krivosenko, Y.S. & Pavlychev, A. Spatio-Temporal Dynamical Systems in Inner-Shell Photoionization in Free Molecules, Clusters, and Solids. J Math Sci 202, 835–848 (2014). https://doi.org/10.1007/s10958-014-2080-z
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DOI: https://doi.org/10.1007/s10958-014-2080-z