Berlin 2018 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 33: Poster Session III

CPP 33.4: Poster

Dienstag, 13. März 2018, 14:00–16:00, Poster C

Temperature evolution of the density disturbance in water on attosecond timescale — •Mirko Elbers¹, Nozomu Hiraoka², Yury Forov¹, Susanne Dogan¹, Christopher Weis¹, Christian Sternemann¹, and Metin Tolan¹ — ¹Fakultät Physik/DELTA, Technische Universität Dortmund, 44227 Dortmund, Germany — ²National Synchrotron Radiation Research Center, 30076 Hsinchu, Taiwan

Water is one of the key components of life on this planet. Its unique properties and anomalies make it highly relevant for many processes in physics, biology and chemistry. In order to investigate those processes, ultrafast techniques such as pump-probe experiments gained in importance during the last years, leading to a better understanding of e.g. the hydrogen bond dynamics in bulk water. We used a different approach, introduced by Abbamonte et al. (Phys. Rev. Lett. 92, 237401, 2004), to image the dynamics of the electron density disturbance in liquid water. This ultrafast imaging method utilizes inelastic x-ray scattering to map the electron density disturbance on an attosecond timescale with an atomic spatial resolution. This is achieved by inverting the energy loss function, accessible in the experiment for a wide range of momentum and energy transfers, into time and space. In this study we take a closer look on the electron dynamics in water at various thermodynamical conditions i.e. different temperatures and pressures, reaching a time resolution below 9 as. The experiments were performed at beamline BL12XU of SPring-8 (Koto, Japan).