Stuttgart 2012 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 12: Interaction with strong or short laser pulses III
A 12.7: Vortrag
Dienstag, 13. März 2012, 12:15–12:30, V47.03
Molecular dynamics studied with XUV pump–probe experiments — Yuhai Jiang1, •Arne Senftleben1, Moritz Kurka1, Artem Rudenko2, Kirsten Schnorr1, Georg Schmid1, Kristina Meyer1, Thomas Pfeifer1, Lutz Foucar2, Oliver Herrwerth3, Matthias Kübel3, Matthias Kling3, Joachim Ullrich1, Claus-Dieter Schröter1, and Robert Moshammer1 — 1Max-Planck-Insitut f. Kernphysik, Heidelberg — 2Max-Planck Advanced Study Group, Hamburh — 3Max-Planck-Institut f. Quantenoptik, Garching
Present free-electron lasers deliver pulses of extreme ultra-violet (XUV) radiation as short tens of femtoseconds. This enables to study molecular dynamics in real time using the pump–probe technique: Here, one pulse ionizes the molecule and initiates changes to its structure, while a time-delayed second pulsed induced Coulomb explosion. By measuring the momenta of the resulting fragment ions with a reaction microscope, we can reconstruct the molecular structure at the time of the second pulse. Through variation of the time-delay from shot to shot, a “molecular movie” is taken. We will show results from our recent investigations of dissociating diatomic molecules (D2, N2, I2) and isomerization reactions in acetylene and ethylene.