Resonant mjukröntgenspridning för studier av atomer och molekyler

Tidsperiod: 2018-12-01 till 2021-12-31

Projektledare: Jan-Erik Rubensson

Medarbetare: Joseph Nordgren, Joseph Ntaganira, Joseph Otieno, Marcus Agåker, Marcus Agåker Agåker

Finansiär: Vetenskapsrådet

Bidragstyp: Projektbidrag

Budget: 3 659 000 SEK

Resonant Inelastic Soft X-ray Scattering (RIXS) and related experiments are applied to atoms, molecules, liquids and molecular materials. The most important assets of the RIXS process include Ångström-scale site-specificity, access to the femtosecond time scale, and the symmetry selectivity imposed by the dipole approximation. Two new RIXS facilities are about to come into operation: First, the VERITAS endstation at the MAX IV laboratory uses the outstanding brilliance of the diffraction-limited 3-GeV storage ring to refine the RIXS technique, especially concerning energy resolution. Second, a 1D imaging spectrometer installed as a Swedish in-kind contribution the the European XFEL allows for non-linear and time-resolved X-ray spectroscopy. These facilities promise access to interactions that have hitherto been hidden to X-ray methodology: In this project we will use the new opportunities  information about the evolution of the molecular electronic-vibronic wavefunctions can be achieved and the role of spin-orbit coupling, electronic-vibronic coupling and decoherence during the development of wavefunctions far from equilibrium, close to barriers and conical intersections, can be addressed in a unique way. The dynamics will be influenced and controlled in femtosecond pump-probe experiments. The short intense XFEL pulses let us aim for techniques based on the stimulated RIXS process with the goal to establish coherent methods in the X-ray range.