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

Guillemin R.; Inhester L.; Ilchen M.; Mazza T.; Boll R.; Weber Th.; Eckart S.; Grychtol P.; Rennhack N.; Marchenko T.; Velasquez N.; Travnikova O.; Ismail I.; Niskanen J.; Kukk E.; Trinter F.; Gisselbrecht M.; Feifel R.; Sansone G.; Rolles D.; Martins M.; Meyer M.; Simon M.; Santra R.; Pfeifer T.; Jahnke T.; Piancastelli M. N.
Isotope effects in dynamics of water isotopologues induced by core ionization at an x-ray free-electron laser

Guillemin R.
Inhester L.
Ilchen M.
Mazza T.
Boll R.
Weber Th.
Eckart S.
Grychtol P.
Rennhack N.
Marchenko T.
Velasquez N.
Travnikova O.
Ismail I.
Niskanen J.
Kukk E.
Trinter F.
Gisselbrecht M.
Feifel R.
Sansone G.
Rolles D.
Martins M.
Meyer M.
Simon M.
Santra R.
Pfeifer T.
Jahnke T.
Piancastelli M. N.
Katso/Avaa
Lataukset: 

AIP Publishing LLC
doi:10.1063/4.0000197
URI
https://doi.org/10.1063/4.0000197
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Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2025082787737
Tiivistelmä

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.

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