No evidence for large-scale proton ordering in Antarctic ice from powder neutron diffraction.
We have examined a sample of 3000 year old Antarctic ice, collected at the Kohnen Station, by time-of-flight powder neutron diffraction to test the hypothesis of Fukazawa et al. [e.g., Ann. Glaciol. 31, 247 (2000)] that such ice may be partially proton ordered. Great care was taken to keep our sample below the proposed ordering temperature (237 K) at all times, but we did not observe any evidence of proton ordering.
Department of Earth Sciences, University College London, Gower Street, London, WC1E 6BT, United Kingdom. andrew.fortes@ucl.ac.uk
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Fortes
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Wood
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Grigoriev
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Alfredsson
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Kipfstuhl
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Knight
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Smith