Attosecond impulsive stimulated x-ray raman scattering in liquid water

We report the measurement of impulsive stimulated x-ray Raman scattering in neutral liquid water. An attosecond pulse drives the excitations of an electronic wavepacket, which comprises two steps: a transition to core-excited states near the oxygen atoms accompanied by transition to a valence-excited states. Thus, the wavepacket is impulsively created at a specific atomic site within a few hundred attoseconds through a non-linear interaction between the water and the x-ray pulse. We observe this nonlinear signature in an intensity dependent Stokes Raman sideband at 526 eV. Our measurements are supported by our state-of-the-art calculations based on the polarisation response of water dimers in bulk solvation and propagation of attosecond x-ray pulses at liquid density., , , # Attosecond Impulsive Stimulated X-ray Raman Scattering in Liquid Water

[https://doi.org/10.5061/dryad.dv41ns26m](https://doi.org/10.5061/dryad.dv41ns26m)

Data from the Science Advances paper *\"Attosecond Impulsive Stimulated X-ray Raman Scattering in Liquid Water\"*.

## Description of the data and file structure

All data is contained in .csv files, labelled with figure numbers corresponding to the figures in the assosciated paper and supplementary material.

For the experimental data, the portion of the filename before the underscore identifies the figure, and the portion after the underscore identifies the data axis.

The data files for theory plots, without underscore in their name, contain the data from the horizontal and vertical axis in the first and second columns, respectively, and when several datasets are represented in the same figure, they are stored in the subsequent columns. In the population-evolution data (Figs. 3B, S11, S12, S15, S21), the second column corresponds ...