Ionic charge dependence of ion-solvent ICD time-scale for aqueous ions probed by the core-hole clock
(English)Manuscript (preprint) (Other academic)
Auger electron spectroscopy combined with theoretical calculations have been applied to investigate the decay of the Ca 2p core hole of aqueous Ca2+. Localized final states due to Auger-like and de-localized final states due to ICD-like decay processes are identified. By applying the core-hole clock spectroscopy method, the time constant of the ICD-like decay was determined to 24±6 fs for Ca2+. We have compared to ICD-like processes in other aqueous ions, K+, Na+, Mg2+ and Al3+, and observe a variation of the time constants of two orders of magnitude. This large variation is qualitatively explained by differences both internal and external to the ions; different internal decay mechanisms of the ions, as well as external differences in the ion-solute distances and interactions.
Condensed Matter Physics
Research subject Physics with spec. in Atomic, Molecular and Condensed Matter Physics
IdentifiersURN: urn:nbn:se:uu:diva-138742OAI: oai:DiVA.org:uu-138742DiVA: diva2:379724