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Title: Diffractive imaging of a rotational wavepacket in nitrogen molecules with femtosecond megaelectronvolt electron pulses

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms11232· OSTI ID:1251412

Imaging changes in molecular geometries on their natural femtosecond timescale with sub-Angström spatial precision is one of the critical challenges in the chemical sciences, as the nuclear geometry changes determine the molecular reactivity. For photoexcited molecules, the nuclear dynamics determine the photoenergy conversion path and efficiency. Here we report a gas-phase electron diffraction experiment using megaelectronvolt (MeV) electrons, where we captured the rotational wavepacket dynamics of nonadiabatically laser-aligned nitrogen molecules. We achieved a combination of 100 fs root-mean-squared temporal resolution and sub-Angstrom (0.76 Å) 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. Lastly, our results demonstrate a significant and promising step towards making atomically resolved movies of molecular reactions.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1251412
Alternate ID(s):
OSTI ID: 1335955
Journal Information:
Nature Communications, Vol. 7; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 78 works
Citation information provided by
Web of Science

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  • Battaglia, Marco; Contarato, Devis; Denes, Peter
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 622, Issue 3 https://doi.org/10.1016/j.nima.2010.07.066
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A novel nondestructive diagnostic method for mega-electron-volt ultrafast electron diffraction journal November 2019
Ultrafast Relativistic Electron Nanoprobes journal May 2019
A direct electron detector for time-resolved MeV electron microscopy journal March 2017
High current table-top setup for femtosecond gas electron diffraction journal July 2017
Time-dependent analysis of the mixed-field orientation of molecules without rotational symmetry journal June 2017
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The effect of Coulomb repulsion on the space-time resolution limits for ultrafast electron diffraction journal February 2019
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A Novel Nondestructive Diagnostic Method for Mega-Electron-Volt Ultrafast Electron Diffraction text January 2020
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Excited-state dynamics of molecules with classically driven trajectories and Gaussians text January 2019
Molecular movie of ultrafast coherent rotational dynamics of OCS journal July 2019
Time-dependent analysis of the mixed-field orientation of molecules without rotational symmetry text January 2017
Excited-state dynamics of molecules with classically driven trajectories and Gaussians text January 2019
Time-dependent analysis of the mixed-field orientation of molecules without rotational symmetry text January 2017
Attomicroscopy: from Femtosecond to Attosecond Electron Microscopy text January 2018
RichMol: A general variational approach for rovibrational molecular dynamics in external electric fields text January 2018
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A general method for baseline-removal in ultrafast electron powder diffraction data using the dual-tree complex wavelet transform journal December 2016