Berlin 2014 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 5: Posters 1: Electronic Spectroscopy, Photochemistry, Femtosecond Spectroscopy
MO 5.27: Poster
Montag, 17. März 2014, 16:30–18:30, Spree-Palais
Molecular frame electron diffraction imaging with ultrashort electron pulses — •Faruk Krecinic, Jean-Gabriel Brisset, Arnaud Rouzée, and Marc Vrakking — Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Berlin, Deutschland
Following ultrafast molecular dynamics in real time and space is a longstanding goal in ultrafast science. We are developing a new ultrashort pulsed electron source setup in order to follow such ultrafast structural dynamic of molecules in the gas phase. The electron source will generate pulses with a bunch duration down to 100 fs and with an energy of 100 keV. These electrons will then be used to ionize molecules that have been pre-aligned with ultrashort laser excitation, producing energetic secondary electrons. Our experiment will focus on following changes in the molecular structure by looking at the angular momentum distribution of the secondary electrons. This is predicted to display electron diffraction effects that can be linked to the structure of the molecule. Here we will show some first results of field-free alignment of the CF3I molecule and its ionization with the electron source.