FIG. 3.
Retrieving the “dynamic-free” DOS of liquid methanol. (a) Unoccupied DOS and the two models for the occupied DOS as well as the calculated electronic states of the free methanol molecule on an energy scale relative to the onset of the unoccupied states as used for application of Eq. (4). The orange Lorentzian peaks indicate the excitation energies used for detuned (b) and non-resonant (c) excitation. (b) Experimental RIXS spectrum of liquid methanol at detuned excitation together with the fitted spectrum resulting from Eq. (4) with ρo = ρo, fit as well the result of Eq. (4) when using the non-resonant XE spectrum for ρo. See (c) for the legend. (c) Same as (b) but for non-resonant excitation. (d) Comparison of experimental spectra and the results of Eq. (4) with ρo = ρo, fit for all measured excitation energies.