Hannover 2016 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 15: Femtosecond Spectroscopy 3
MO 15.8: Vortrag
Donnerstag, 3. März 2016, 13:00–13:15, f102
Diffractive imaging of a molecular rotational wavepacket with femtosecond MeV electron pulses — J. Yang1, •M. Gühr2,3, Th. Vecchione2, M. S. Robinson1, R. Li2, N. Hartmann2, X. Shen2, R. Coffee2, J. Corbett2, A. Fry2, K. Gaffney2, T. Gorkhover2, C. Hast2, K. Jobe2, I. Makasyuk2, A. Reid2, J.S. Robinson2, S. Vetter2, F. Wang2, S. Weathersby2, C. Yoneda2, M. Centurion1, and X. Wang2 — 1Physics Dept., University of Nebraska, Lincoln, USA — 2SLAC National Accelerator Laboratory, Menlo Park, USA — 3Physics and Astronomy, Universität Potsdam, Germany
We captured the rotational wavepacket dynamics of nonadiabatically laser-aligned nitrogen molecules with a combination of 100 fs root-mean-squared (RMS) temporal resolution and sub-Angstrom spatial resolution that makes it possible to resolve the position of the nuclei within the molecule. In addition, the diffraction patterns reveal the angular distribution of the molecules, which changes from prolate (aligned) to oblate (anti-aligned) in 300 fs. Our results demonstrate a significant and important step towards making atomically resolved movies of molecular reactions.