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18. January 2020

MBI researcher was awarded the "JCP Editor's Choice Award 2020

Dr. Arnaud Rouzée received the award for his publication in the Journal of Chemical Physics

Bild: © MBI
Figure: Photoelectron angular distribution recorded in OCS molecules ionized by a 2 μm laser field and used to retrieve the molecular bond lengths.. Credit: © MBI

Dr. Arnaud Rouzée has been awarded the 2020 “JCP Editor’s Choice Award”  that rewards the most outstanding paper published in the Journal of Chemical Physics in 2019 for his work entitled “Atomic-resolution imaging of carbonyl sulfide by laser-induced electron diffraction”.

In this work that was done in collaboration with the group of Jochen Küpper from the Center for Free Electron Lasers (CFEL) in Hamburg, laser-induced electron diffraction (LIED) was used to determine the bond lengths of the carbonyl sulfide (OCS) molecule. In the experiment, an intense and ultrashort mid-infrared laser field was used to ionize OCS molecules and the angle-resolved photoelectron distribution was recorded using a newly developed velocity map imaging spectrometer designed to reach a maximum kinetic energy of 500 eV. In the strong laser field, an electron was removed from each molecule and accelerated away by the laser field before being driven back to its parent ion, inducing elastic scattering of the electron. The scattered electron was once more accelerated in the laser field, reaching a very high kinetic energy. By extracting the differential electron scattering cross section (DCS) of the molecule from the angular distribution of these high-energy electrons, Rouzée and co-workers were able to extract the molecular bond lengths of the OCS molecule to a precision better than 5 pm. The experiment was done using only 10 minutes of integration time, which is almost a 100-fold improvement with respect to previous studies. Thereby, the experiment opens a new path towards directly recording a so-called “molecular movie”, in which the evolving structure of a molecule during a photochemical reaction is measured with femtosecond and picometer resolution.

Original publication
"Atomic resolution imaging of carbonyl sulfide by laser-induced electron diffraction"
E. T. Karamatskos, G. Goldsztejn, S. Raabe, P. Stammer, T. Mullins, A. Tabattoni, R. R. Johansen, H. Stapelfeldt, S. Trippel, M. J. J. Vrakking, J. Küpper and A. Rouzée
J. Chem Phys. 150, 244301 (2019)

URL, DOI oder PDF

 

Contact:

Max-Born-Institut (MBI) im Forschungsverbund Berlin e.V.
Max-Born-Straße 2A, 12489 Berlin
+49 30 6392 1505, Fax: +49 30 6392 1509
mbi(at)mbi-berlin.de

 

Quelle: Pressemitteilung Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (MBI)

Photonics / Optics Research

Related News

2019 Ernst-Eckhard-Koch Award © M. Setzpfandt/HZB

Felix Willems received Ernst-Eckhard-Koch Award 2019 for his PhD thesis on ultrafast magnetization dynamics

He had analysed ultrafast switching processes using spectroscopic methods at synchrotron sources like BESSY II

Related Institutions

  • Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie im Forschungsverbund Berlin e.V. (MBI)
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