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Microanalysis of Radiation Damage Across a Zoned Zircon Crystal

Published online by Cambridge University Press:  21 March 2011

Chris S. Palenik  and
Rodney C. Ewing
Chris S. Palenik
Affiliation:
Department of Geological Sciences, University of Michigan, Ann Arbor, MI 48109-1063, U.S.A.
Rodney C. Ewing
Affiliation:
Department of Geological Sciences, University of Michigan, Ann Arbor, MI 48109-1063, U.S.A. Department of Nuclear Engineering and Radiological Sciences, University of Michigan Ann Arbor, MI 48109-2104, U.S.A.
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Abstract

An oscillatory-zoned single crystal of zircon (ZrSiO4) from Sri Lanka (560 Ma) provides a unique opportunity to study radiation effects over the dose range of 2.1 - 10.6·1015 á-decay events/mg (0.1 - 0.5 dpa). Each zone has a different radiation dose due to variations in the U (0.09 - 0.53 wt %) and Th (0 - 0.11 wt %) content, but all zones share the same thermal history. The zones span a nearly complete range of microstructures from crystalline to aperiodic. Measurements of birefringence show an inverse-linear correlation with dose over the range of doses observed. Micro-Raman spectroscopy results show that a decrease in peak frequency relative to an undamaged zircon, peak broadening and decreases in peak intensity occur with the accumulation of radiation damage.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 713: Symposium JJ – Scientific Basis for Nuclear Waste Management XXV , 2002 , JJ8.8
Copyright
Copyright © Materials Research Society 2002

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