Mainz 2017 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 5: Clusters I (with A)
MO 5.4: Vortrag
Dienstag, 7. März 2017, 11:45–12:00, N 6
Disentangling water cluster beams — •Helen Bieker1,2, Daniel Horke1,2, Daniel Gusa1, Boris Sartakov3, Andrey Yachmenev1, and Jochen Küpper1,2,4 — 1Center for Free-Electron Laser Science, DESY — 2The Hamburg Center for Ultrafast Imaging, University of Hamburg — 3General Physics Institute, Russian Academy of Sciences — 4Department of Physics, University of Hamburg
To unravel the microscopic details of intermolecular interactions in water, we prepare controlled samples of size- and isomer-selected water clusters. Inhomogeneous electric fields allow us to create pure samples of individual structural isomers or of size-selected molecular clusters and to disperse molecules in a beam according to their quantum states [1].
Here, we aim to develop an understanding of the structures of water clusters containing a few monomer units. We present our first results on the production of size-selected samples using supersonic expansions, subsequent dispersion of the various clusters in strong electric fields, extending previous studies [2]. We introduce a simple theoretical description of water dimer in an electric field. Future experiments aim at utilizing x-ray and electron diffractive imaging to study the structures and ultrafast dissociation dynamics of these polymolecular systems.
[1] Y.P. Chang, D. A. Horke, S. Trippel and J. Küpper, Int. Rev. Phys Chem. 34, 557-590 (2015)
[2] R. Moro, R. Rabinovitch, C. Xia, and V.V. Kresin, Phys. Rev. Lett. 97, 123401 (2006)