X-Ray Diffraction Topographic Studies of Antarctic Deep Core Ice

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概要

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• X-ray diffraction topographs of Antarctic deep core ice revealed mosaic strctures in comparatively large single crystals near the bottom of a 2000m ice sheet. Strain fields around thin cleavage cracks produced on the relaxation process of the ice exhibited characteristic "Butterfly-wing" contrasts on the topograph scanned on (0001) with {1120} reflection. Three types of characteristic contrasts are well interpreted as the orientation contrasts caused by inclined reflecting planes in the strain field of the crack of which the shape is modelled by a double cone. The angular on the cone in which the inclined reflecting planes satisfy the Bragg condition are calculated and illustrted in a figure with respect to both the base angle θ of the cone and the rotation angle ψ of mosaic elements. The structures and density of dislocations in the strain field around cracks are discussed.

• 社団法人応用物理学会の論文
• 1978-06-05

著者

• Higashi Akira

  Department Of Applied Physics Faculty Of Engineering Hokkaido University

• SHOJI Hitosi

  Department of Applied Physics, Faculty of Engineering, Hokkaido University

• Shoji Hitosi

  Department Of Applied Physics Faculty Of Engineering Hokkaido University

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• The bubble close-off density of ice in Antarctic ice sheets
• X-ray Diffraction Topographic Studies of Dislocations in Natural Large Ice Single Crystals
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• Observation of Etch Channels on the (0001) Plane of Ice Crystal Produced by Nonbasal Glide
• X-Ray Diffraction Topographic Studies of Antarctic Deep Core Ice

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