FIG. 2.

Excitation energy detuning and control of nuclear dynamics in RIXS. (a) Low energy flank of the XA resonance. (b) Split peak emission feature of the RIXS spectra excited in the XA flank and below the resonance. (c) Region of elastic scattering for excitation in the XA flank and below the resonance. The spectral intensity is subdivided into the three decay channels from the core-excited state, which are depicted in (e) of the figure. See main text for details. The experimental data in (a)-(c) are the same as in Figure 1. (d) Probability for nuclear dynamics in the core-excited state as determined from the intensities in (c). See main text for details. (e) Schematic illustration of how nuclear dynamics are manifested in the vibrational progression.