Mainz 2017 – scientific programme
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A: Fachverband Atomphysik
A 10: Diffraction and Coherences (with MO)
A 10.3: Talk
Monday, March 6, 2017, 17:45–18:00, N 6
Femtosecond Diffractive Imaging of Coherent Nuclear Motion using Relativistic Electrons — Jie Yang1, •Markus Gühr2,3, Xiaozhe Shen3, Renkai Li3, Theodore Vecchione3, Ryan Coffee3, Jeff Corbett3, Alan Fry3, Nick Hartmann3, Carsten Hast3, Kareem Hegazy3, Keith Jobe3, Igor Makasyuk3, Joseph Robinson3, Matthew Robinson1, Sharon Vetter3, Stephen Weatherby3, Charles Yoneda3, Xijie Wang3, and Martin Centurion1 — 1Department of Physics, University of Nebraska-Lincoln,Lincoln, NE, USA — 2Institut für Physik und Astronomie,Universität Potsdam, Potsdam, Germany — 3SLAC National Accelerator Laboratory, Menlo Park, CA, USA
Observing ultrafast changes in the molecular geometry after photoexcitation is crucial to understand the conversion of light energy into other energetic degrees of freedom within molecules. We present a time resolved electron diffraction study of a molecular vibrational wavepacket in photoexcited isolated iodine. We determine the time-varying interatomic distance with a precision 0.07 Å and a temporal resolution of 230 fs full width at half maximum. The method is not only sensitive to the position but also the shape of the nuclear wave packet.