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Ultraviolet-Induced Amorphization of Cubic Ice and its Implication for the Evolution of Ice Grains

Published online by Cambridge University Press:  12 April 2016

A. Kouchi  and
T. Kuroda
A. Kouchi
Affiliation:
Institute of Low Temperature Science, Hokkaido University, Sapporo 060, Japan
T. Kuroda
Affiliation:
Institute of Low Temperature Science, Hokkaido University, Sapporo 060, Japan

Abstract

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We found that cubic ice is transformed below 70 k to amorphous ice by ultraviolet irradiation, whereas no change in structure is observed at temperatures above 70 K, regardless of the irradiation time. Experimental results can be interpreted by theoretical consideration of nucleation and growth of cubic ice in amorphous ice. We also discuss the evolution of ice grains in space on the basis of the experimental results.

Type
Interplanetary Dust: Physical and Chemical Analysis
Information
International Astronomical Union Colloquium , Volume 126: Origin and Evolution of Interplanetary Dust , 1991 , pp. 87 - 90
Copyright
Copyright © Kluwer 1991

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