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Measurements of ultrafast dissociation in resonant inelastic x-ray scattering of water
Stockholm University, Faculty of Science, Department of Physics.
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Number of Authors: 52019 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 150, no 20, article id 204201Article in journal (Refereed) Published
Abstract [en]

There has been a discussion on the interpretation of the resonant inelastic x-ray scattering (RIXS) spectra of liquid water in terms of either different structural environments or that core hole dynamics can generate well-resolved dissociative spectral components. We have used RIXS with high resolution in the OH stretch vibration energy part, at extremely high overtones going toward the continuum of full OH bond breakage, to identify the amount of dissociative contributions in the valence band RIXS spectra at different excitation energies. We observe that at low excitation energies, corresponding to population of states with strongly antibonding character, the valence band RIXS spectra have a large contribution from a well-resolved dissociative feature. Instead, at higher excitations, this spectral component diminishes and becomes a weak structure on the high-energy side of one of the spectral peaks related to the 1b(1), state from tetrahedral configurations. This result brings both interpretations to be essential for the understanding of RIXS spectra of liquid water.

Place, publisher, year, edition, pages
2019. Vol. 150, no 20, article id 204201
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Chemical Sciences Physical Sciences
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URN: urn:nbn:se:su:diva-171158DOI: 10.1063/1.5081886ISI: 000473301400031PubMedID: 31153206OAI: oai:DiVA.org:su-171158DiVA, id: diva2:1343191
Available from: 2019-08-15 Created: 2019-08-15 Last updated: 2019-08-15Bibliographically approved

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