Abstract
We report measurements of the nonresonant inelastic x-ray scattering (NRIXS) from the orbitals in ice Ih, and also report calculations of the corresponding spectra for ice Ih and several other phases of water ice. We find that the intermediate-energy fine structure may be calculated well using an ab initio real-space full multiple scattering approach and that it provides a strong fingerprint of the intermediate-range order for some ice phases. Both experiment and theory find that the intermediate-range fine structure, unlike the near-edge structure, is independent of momentum transfer to very high . These results have important consequences for future NRIXS measurements of high-pressure phases of ice.
- Received 9 February 2009
DOI:https://doi.org/10.1103/PhysRevB.79.174117
©2009 American Physical Society