Speakers
Description
Along with the rapid development of the laser technology allowing for time-resolved studies, a remarkable progress in the synchrotron technology provides nowadays a wealth of information on the relaxation mechanisms of core-exited systems through high energy-resolution electron and X-ray spectroscopy and essentially complements the time-resolved studies [1]. We use X-ray emission spectroscopy and Auger electron spectroscopy for addressing ultrafast dynamic processes in deeply core-excited molecules in the tender X-ray range (photon energy of 1-12 keV).
In the first part, we will present an example demonstrating how the information on the dynamic response of molecules can be obtained using high-resolution Auger electron spectroscopy. Using hard X-ray photoelectron spectrometer HAXPES installed at the GALAXIES beamline of SOLEIL synchrotron we have demonstrated an evidence of ultrafast proton motion occurring in the double-core-hole states in gas-phase water molecules ionized with hard x-ray radiation [2].
In the second part, progress in the development of a novel spectrometer MOSARIX in the tender x-ray range will be presented [3]. The aim is to achieve a capability for high-resolution and high-efficiency measurements using multi-mosaic crystals in Von Hamos geometry. Furthermore, MOSARIX will be equipped with a time- and position-sensitive detection allowing extension towards time-resolved X-ray emission spectroscopy in coincidence with ion or electron spectroscopy at pulsed X-ray sources.
[1] M. N. Piancastelli et al., J. Phys. B: At. Mol Opt. Phys. 50, 042001 (2017)
[2] T. Marchenko et al., Phys. Rev. A 98, 063403 (2018)
[3] I. Ismail et al., submitted
