The second major question posed in the introduction can be phrased as "How is the general solvent behavior and how strong is the solvent response damped?". Here, the RDFs in Figures S10 and S11 and the ones in Ref. 33 exhibit significant coherent oscillations, which are expected to be observable in time-dependent Xray scattering experiments. Such coherent oscillations in the RDFs could be taken as indications of a relatively weakly damped (i.e., underdamped) solvent motion, where the solvent molecules oscillate back and forth around the new equilibrium positions governed by the excited solute. In order to verify whether such underdamped solvent dynamics actually takes place, we have investigated various slices through the 3D-SDFs shown in Figure . As shown in selected slices in Section S2.6 (Figs. and), no notable oscillatory dynamics of the solvent molecules themselves are present. Instead, the solvent relaxes in a relatively strongly damped fashion, due to the large degree of disorder and the many interactions among the solvent molecules. The oscillations in Figures S10 and S11 can thus be assigned to coherent oscillations in the solute molecule, i.e., to coherent vibrations of solute molecules relative to less mobile solvent molecules. This finding is fully con-sistent with recent X-ray solvent scattering experiments on photoexcited iodide ions, where no oscillatory solvent response was measured due to the absence of internal degrees of freedom in the (monoatomic) solute.