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Response of Zircon to Electron and Ne+ Irradiation

Published online by Cambridge University Press:  10 February 2011

R. Devanathan ,
W. J. Weber  and
L. A. Boatner
R. Devanathan
Affiliation:
Pacific Northwest National Laboratory, Richland WA 99352, ram@pnl.gov
W. J. Weber
Affiliation:
Pacific Northwest National Laboratory, Richland WA 99352, ram@pnl.gov
L. A. Boatner
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831
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Abstract

Zircon (ZrSiO4) is an actinide host phase in vitreous ceramic nuclear waste forms and a potential host phase for the disposition of excess weapons plutonium. In the present work, the effects of 800 and 900 keV electron, and 1 MeV Ne+ irradiations on the structure of single crystals of ZrSiO4 have been investigated. The microstructural evolution during the irradiations was studied in situ using a high-voltage electron microscope interfaced to an ion accelerator at Argonne National Laboratory. The results indicate that electron irradiation at 15 K cannot amorphize ZrSiO4 even at fluences an order of magnitude higher than that required for amorphization by 1.5 MeV Kr + ions. However, the material is readily amorphized by I MeV Ne+ irradiation at 15 K. The temperature dependence of this amorphization is discussed in light of previous studies of radiation Zdamage in ZrSiO4.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 481: Symposium P – Science and Technology of Semiconductor Surface Preparation , 1997 , 419
Copyright
Copyright © Materials Research Society 1998

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References

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