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Lennart Aufleger

As seen in: Royal Society of Chemistry, Physical Review B
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Articles by Lennart Aufleger

Resolving vibrations in a polyatomic molecule with femtometer precision via x-ray spectroscopy

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By Patrick Rupprecht, Max-Planck-Institut für Kernphysik, Lennart Aufleger, Simon Heinze
| Physical Review B
We measure molecular vibrations with femtometer precision via resonance energy shifts using time-resolved x-ray absorption spectroscopy. For a demonstration, a Raman process excites the A1g mode in gas-phase SF6 molecules with an amplitude of approximately 50fm, which is probed by a time-delayed soft-x-ray pulse at the sulfur L2,3 edge.
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Laser Control of Electronic Exchange Interaction within a Molecule

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By Patrick Rupprecht, Max-Planck-Institut für Kernphysik, Lennart Aufleger, Simon Heinze
| Physical Review B
Abstract Electronic interactions play a fundamental role in atoms, molecular structure and reactivity. We introduce a general concept to control the effective electronic exchange interaction with intense laser fields via coupling to excited states. As an experimental proof of principle, we study the SF6 molecule using a combination of soft x-ray and infrared (IR) laser pulses.
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XUV pump-XUV probe transient absorption spectroscopy at FELs

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By Thomas Ding, Max-Planck-Institut für Kernphysik, Marc Rebholz, Lennart Aufleger
| Royal Society of Chemistry Verified
XUV pump–XUV probe transient absorption spectroscopy at FELs Thomas Ding,*a Marc Rebholz,a Lennart Aufleger,a Maximilian Hartmann, a Veit Stooß,a Alexander Magunia,a Paul Birk,a Gergana Dimitrova Borisova,a Carina da Costa Castanheira,a Patrick Rupprecht, a Yonghao Mi, a Thomas Gaumnitz,b Zhi-Heng Loh,c Sebastian Roling,d Marco Butz,e Helmut Zacharias, e Stefan Düsterer,f Rolf Treusch, f Christian Ott a and Thomas Pfeifer a Author affiliations * Corresponding authors a Max-Planck-Institut...
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XUV pump - XUV probe transient-absorption spectroscopy at FELs

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By Maximilian Hartmann, Thomas Ding, Marc Rebholz, Lennart Aufleger
| Royal Society of Chemistry Verified
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