Heidelberg 2015 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 18: Biomolecules
MO 18.7: Vortrag
Donnerstag, 26. März 2015, 12:45–13:00, PH/SR106
Valence-Shell-Photoelectron Imaging of Controlled Biomolecules — •Joss Wiese1, Sebastian Trippel1, and Jochen Küpper1,2,3 — 1Center for Free-Electron Laser Science, DESY, Hamburg — 2The Hamburg Center for Ultrafast Imaging — 3Department of Physics, University of Hamburg
A molecule's chemical behaviour is governed by its electronic properties. Thus, a view at the evolution of the involved molecular orbitals during a reaction lures with insight into the fundamentals of chemistry.
In our experiments molecules are investigated by means of photoelectron imaging. State-selected molecular ensembles are laser aligned or mixed-field oriented inside a velocity map imaging spectrometer. The resulting velocity maps display the projected three dimensional distributions of both, the photoelectrons' kinetic energy and their release angle, in the molecular frame (MFPADs). MFPADs of various molecules will be discussed in terms of the molecular orbitals which are involved in the ionization process. Three dimensional MFPADs will be presented, which were obtained through tomographic reconstruction of the projected 2D images.