Figure 1
From: Suppression of X-ray-induced dissociation of H2O molecules in dense ice under pressure

XRS spectra at various pressures.
Oxygen K-edge XRS spectra of H2O at (A) 7.5, (B) 21, (C) 32 and (D) 39 GPa, with a typical energy resolution of 1.4 eV. The asterisk shows the location of the signal seemingly derived from oxygen molecules generated by dissociation. Each spectrum were fitted with two or three Gaussian, one arctangent and one linear base functions shown by solid lines.