Fig. 2: Potential energy curves.
From: Observation of molecular resonant double-core excitation driven by intense X-ray pulses

Calculated simplified potential energy curve diagram of the neutral GS (black), SCH (orange), and ts-DCH (blue) states, and of the cationic valence and core ionized final states resulting from SCH-P and DCH-PP, respectively. Equilibrium bond distances are marked by the small vertical bars, and dissociation potentials by the shaded areas.