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Title: Isotope effects in dynamics of water isotopologues induced by core ionization at an x-ray free-electron laser

Journal Article · · Structural Dynamics
DOI: https://doi.org/10.1063/4.0000197 · OSTI ID:2234041
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  1. Sorbonne University, Centre National de la Recherche Scientifique (CNRS), Paris (France)
  2. Deutsches Elektronen-Synchrotron DESY 2, Hamburg (Germany)
  3. European XFEL 3, Schenefeld (Germany); Deutsches Elektronen-Synchrotron DESY 4, Hamburg (Germany)
  4. European XFEL 3, Schenefeld (Germany)
  5. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  6. Goethe University, Frankfurt (Germany)
  7. University of Turku (Finland)
  8. Deutsches Elektronen-Synchrotron DESY 4, Hamburg (Germany); Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin (Germany)
  9. Lund University (Sweden)
  10. University of Gothenburg (Sweden)
  11. Universität Freiburg, Freiburg (Germany)
  12. Kansas State University, Manhattan, KS (United States)
  13. University of Hamburg (Germany)
  14. Deutsches Elektronen-Synchrotron DESY 2, Hamburg (Germany); University of Hamburg (Germany)
  15. Max-Planck-Institut für Kernphysik, Heidelberg (Germany)

Dynamical response of water exposed to x-rays is of utmost importance in a wealth of science areas. We exposed isolated water isotopologues to short x-ray pulses from a free-electron laser and detected momenta of all produced ions in coincidence. By combining experimental results and theoretical modeling, we identify significant structural dynamics with characteristic isotope effects in H2O2+, D2O2+, and HDO2+, such as asymmetric bond elongation and bond-angle opening, leading to two-body or three-body fragmentation on a timescale of a few femtoseconds. A method to disentangle the sequences of events taking place upon the consecutive absorption of two x-ray photons is described. The obtained deep look into structural properties and dynamics of dissociating water isotopologues provides essential insights into the underlying mechanisms.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); German Research Foundation (DFG); German Federal Ministry of Education and Research (BMBF); French CNRS GotoXFEL; European Union's Horizon 2020; Max-Planck-Gesellschaft; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); Swedish Research Council; Knut and Alice Wallenberg Foundation
Grant/Contract Number:
AC02-05CH11231; SC0019451
OSTI ID:
2234041
Journal Information:
Structural Dynamics, Journal Name: Structural Dynamics Journal Issue: 5 Vol. 10; ISSN 2329-7778
Publisher:
American Crystallographic Association/AIPCopyright Statement
Country of Publication:
United States
Language:
English

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