Suppression of X-ray-induced dissociation of H2O molecules in dense ice under pressure.

Abstract:

:We investigated molecular dissociation induced by 10-keV X-ray irradiation in dense ice at pressures up to 40 GPa at 300 K. The dissociation yield estimated from the oxygen K-edge X-ray Raman spectra, showed that the molecular dissociation was enhanced up to 14 GPa and gradually suppressed on further compression to 40 GPa. The molecular dissociation was detected for a rather narrow pressure span of 2-40 GPa by the X-ray spectroscopy. The pressure variation of the dissociation yield was similar to that observed in the electric conductivity of ice VII and likely interpreted in terms of proton mobility.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Fukui H,Hiraoka N,Hirao N,Aoki K,Akahama Y

doi

10.1038/srep26641

subject

Has Abstract

pub_date

2016-05-25 00:00:00

pages

26641

issn

2045-2322

pii

srep26641

journal_volume

6

pub_type

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