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Ultrafast nuclear dynamics in the doubly-core-ionized water molecule observed via Auger spectroscopy
Sorbonne Univ, CNRS, LCPMR, F-75005 Paris, France;Synchrotron SOLEIL, Orme Merisiers, BP 48, F-91192 Gif Sur Yvette, France.
DESY, Ctr Free Electron Laser Sci, Notkestr 85, D-22607 Hamburg, Germany;Hamburg Ctr Ultrafast Imaging, Luruper Chaussee 149, D-22761 Hamburg, Germany.
Sorbonne Univ, CNRS, LCPMR, F-75005 Paris, France.
Sorbonne Univ, CNRS, LCPMR, F-75005 Paris, France;Synchrotron SOLEIL, Orme Merisiers, BP 48, F-91192 Gif Sur Yvette, France.
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2018 (English)In: Physical Review A: covering atomic, molecular, and optical physics and quantum information, ISSN 2469-9926, E-ISSN 2469-9934, Vol. 98, no 6, article id 063403Article in journal (Refereed) Published
Abstract [en]

We present a combined experimental and theoretical study of the Auger-emission spectrum following double core ionization and excitation of gas-phase water molecules with hard-x-ray synchrotron radiation above the O K-2 threshold. We observe an indication of ultrafast proton motion occurring within the 1.5 fs lifetime of the double-core-hole (DCH) states in water. Furthermore, we have identified symmetric and antisymmetric dissociation modes characteristic for particular DCH states. Our results serve as a fundamental reference for state-of-the-art studies of DCH dynamic processes in liquid water both at synchrotron and free-electron-laser facilities.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2018. Vol. 98, no 6, article id 063403
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Atom and Molecular Physics and Optics
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URN: urn:nbn:se:uu:diva-372374DOI: 10.1103/PhysRevA.98.063403ISI: 000451974700014OAI: oai:DiVA.org:uu-372374DiVA, id: diva2:1276424
Available from: 2019-01-08 Created: 2019-01-08 Last updated: 2019-01-08Bibliographically approved

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Piancastelli, Maria Novella

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