Oxygen K-edge fine structures of water by x-ray Raman scattering spectroscopy under pressure conditions

Journal Article · Sun Oct 07 00:00:00 EDT 2007 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.2774988· OSTI ID:21024247

Fukui, Hiroshi; Huotari, Simo; Andrault, Denis; Kawamoto, Tatsuhiko ^[1]

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1. Institute for Study of the Earth's Interior, Okayama University, Misasa, Tottori 682-0193 (Japan)

Fine structure of the oxygen K edge was investigated for water at ambient pressure, 0.16, 0.21, 0.27, 0.47, and 0.60 GPa using x-ray Raman scattering spectroscopy (XRS). Similarity in near-edge structures at 0.16 and 0.60 GPa suggests little difference in the electronic state of oxygen in the low-pressure and high-pressure forms of water. Yet, we observed significant variation of preedge structure of the XRS spectra with compression. The intensity of the preedge peak at 535.7 eV has a minimal value at around 0.3 GPa, indicating that the number of hydrogen bonding increases first and then decreases as a function of pressure.

• OSTI ID: 21024247
• Journal Information: Journal of Chemical Physics, Vol. 127, Issue 13; Other Information: DOI: 10.1063/1.2774988; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
74 ATOMIC AND MOLECULAR PHYSICS
COMPRESSION
EV RANGE 100-1000
FINE STRUCTURE
HYDROGEN
OXYGEN
PRESSURE DEPENDENCE
PRESSURE RANGE MEGA PA 100-1000
RAMAN EFFECT
RAMAN SPECTRA
SPECTROSCOPY
WATER
X RADIATION
X-RAY SPECTRA