Hannover 2016 – scientific programme
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MO: Fachverband Molekülphysik
MO 20: Femtosecond Spectroscopy 4
MO 20.8: Talk
Friday, March 4, 2016, 12:45–13:00, f102
Imaging molecular dynamics in I2 by strong-field ionization — •Florian Bach, Felix Brauße, Faruk Krecinic, Arnaud Rouzee, Hans-Hermann Ritze, and Marc Vrakking — Max-Born-Institut, Berlin, Germany
We investigated the dissociating wave packet dynamics in I2 molecules following excitation by a 710 nm, 50 fs, pump laser pulse into the A state. The molecular motion was mapped into the photoelectron and photoion momentum distributions resulting from strong-field ionization by a 1300 nm probe laser pulse. Both momentum distributions were recorded with a velocity map imaging spectrometer (VMIS). The kinetic energy distribution of the I+ fragments shows a clear signature of the dissociating wave packet motion induced by the pump laser pulse. We observe as well a modification of the angular distribution of the high kinetic energy photoelectrons that result from laser induced electron rescattering with the time delay between the two pulses that we assign to the change of the internuclear distance of the molecule.