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MO: Fachverband Molekülphysik
MO 27: Poster 3: Collisions, Electronic Spectroscopy, Energy Transfer, Quantum Chemistry, Molecular Dynamics, Photochemistry, Spectroscopy in He-Droplets
MO 27.17: Poster
Donnerstag, 21. März 2013, 16:00–18:30, Empore Lichthof
Towards electron-impact ionization dynamics of biologically relevant molecules in a reaction microscope — •Thomas Pflüger1, Xueguang Ren2, Marvin Weyland1, Woonyong Baek1, Alexander Dorn2, and Hans Rabus1 — 1Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig — 2Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg
After decades of investigation of the ionization dynamics of simple atoms and molecules in electron collision experiments, in recent years significant progress was being made in the study of more complex and finally biologically relevant targets (e.g. [1]). Our aim is to provide high-differential ionization cross sections and insight into fragmentation dynamics. Experimentally this is accessible by using an advanced reaction microscope (REMI) which was modified for electron impact experiments. In a REMI, all charged particles which emerge from a reaction are detected and their momentum vectors are reconstructed. Hence, it is possible to extract electronic information in form of e.g. triple-differential cross sections as well as fragmentation informations like kinetic energy release and molecular orientations. First results are presented for simple molecules as test candidates (e.g. CH4) and tetrahydrofuran.
[1] M. Dampc et al., J. Phys. B 44 (2011), 055206