Suppression of X-ray-induced Dissociation of H2O Molecules in Dense Ice Under Pressure

Overview

Journal Sci Rep

Specialty Science

Date 2016 May 26

PMID 27221010

Citations 2

Authors

Hiroshi Fukui

Nozomu Hiraoka

Naohisa Hirao

Katsutoshi Aoki

Yuichi Akahama

Affiliations

Soon will be listed here.

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.

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