Heidelberg 2015 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 11: Posters 2: Novelties in Molecular Physics
MO 11.9: Poster
Dienstag, 24. März 2015, 17:00–19:00, C/Foyer
Molecular Frame Photoelectron Angular Distributions in CF3I Molecules — •Felix Brauße, Arnaud Rouzée, and Marc Vrakking — Max-Born-Institut für nichtlineare Optik, Berlin
Over the last decade, the emergence of X-ray free-electron lasers (FELs) and high-order harmonic generation (HHG) XUV-sources has enabled the development of diffractive methods for imaging time-resolved molecular dynamics. One of the main driving forces behind the development of the FEL is the possibility to perform x-ray diffractive imaging of larger molecules; alternatively, diffractive information can as well be encoded onto photoelectrons that are generated by the ionisation of the molecules with an ultrashort XUV or X-ray pulse. As the photoelectron is emitted, it scatters off the molecule’s multi-centre potential, leading to a diffraction pattern in the final electron momentum distribution.
Here, we present the first step towards the diffractive imaging of the dissociation dynamics of CF3I molecules, induced by a 266 nm pump excitation: we observed the photoelectron angular distributions (PADs) of field-free aligned CF3I molecules. They were ionised by a monochromatic XUV pulse that was obtained from HHG with a 400 nm driving field. Also, we compare the measured PADs to scattering simulations employing the Schwinger variational principle.