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Ultrafast x-ray scattering: chemical dynamics and beyond

Date Mo, 09.07.2018 - Mo, 09.07.2018
Time 16:45
Speaker Prof. Adam Kirrander, School of Chemistry, University of Edinburg, UK
Location ETH Hönggerberg, HPF G6
Program Abstract:
Ultrafast scattering using X-ray Free-Electron Lasers (XFELs) is an exciting development in AMO physics and chemical reaction dynamics [1]. The elastic component of the scattering provides a direct probe of structural dynamics, as demonstrated in recent experiments [2,3] (Fig. 1a). The experiments are supported by ab initio electronic structure calculations and quantum molecular dynamics simulations.

From a theoretical point of view, the standard expressions for X-ray scattering are modified by the quantum superposition inherent in ultrafast experiments [4]. I will demonstrate how the wavepacket limits the spatial resolution attainable in diffraction experiments [5] (see Fig. 1b), and discuss how interference effects might make it possible to characterize electronic coherences during the dynamics.

References
[1] R. S. Minns, A. Kirrander, Faraday Disc. 194, 11 (2016)
[2] M. P. Minitti et al., Phys. Rev. Lett. 114 255501 (2015)
[3] B. Stankus et al., Faraday Disc. 194 525 (2016)
[4] A. Kirrander et al., J. Chem. Theory Comput. 12, 957 (2016)
[5] A. Kirrander, P. M. Weber, Applied Science 7, 534 (2017)

Host: Jeremy Richardson, Laboratory of Physical Chemistry, D-CHAB
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