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Title: Characterization of swift heavy ion irradiation damage in ceria

Abstract

We have examined microstructural evolution in irradiated ceria (CeO2) using swift heavy ion irradiation, electron microscopy, and atomistic simulation. CeO2, a UO2 fuel surrogate, was irradiated with gold ions at an energy of 1 GeV to fluences up to 1x1014 ions/cm2. Transmission electron microscopy accompanied by electron energy loss spectroscopy showed that the ion tracks were of similar size at all fluences, and that there was no chemical change in the ion track core. Classical molecular dynamics simulations of thermal spikes in CeO2 with energy deposition of 12 and 36 keV/nm show damage consisting of isolated point defects at the lower energy and defect clusters at 36 keV/nm, with no amorphization at either energy. Inferences are drawn from modeling about density changes in the ion track and the formation of interstitial loops that shed light on features observed by electron microscopy of swift heavy ion irradiated ceria.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Center for Materials Science of Nuclear Fuel (CMSNF); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1182939
Report Number(s):
PNNL-SA-101304
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Materials Research, 30(9):1473-1484
Additional Journal Information:
Journal Name: Journal of Materials Research, 30(9):1473-1484
Country of Publication:
United States
Language:
English

Citation Formats

Yablinsky, Clarissa, Devanathan, Ram, Pakarinen, Janne, Gan, Jian, Severin, Daniel, Trautmann, Christina, and Allen, T. R. Characterization of swift heavy ion irradiation damage in ceria. United States: N. p., 2015. Web. doi:10.1557/jmr.2015.43.
Yablinsky, Clarissa, Devanathan, Ram, Pakarinen, Janne, Gan, Jian, Severin, Daniel, Trautmann, Christina, & Allen, T. R. Characterization of swift heavy ion irradiation damage in ceria. United States. doi:10.1557/jmr.2015.43.
Yablinsky, Clarissa, Devanathan, Ram, Pakarinen, Janne, Gan, Jian, Severin, Daniel, Trautmann, Christina, and Allen, T. R. Thu . "Characterization of swift heavy ion irradiation damage in ceria". United States. doi:10.1557/jmr.2015.43.
@article{osti_1182939,
title = {Characterization of swift heavy ion irradiation damage in ceria},
author = {Yablinsky, Clarissa and Devanathan, Ram and Pakarinen, Janne and Gan, Jian and Severin, Daniel and Trautmann, Christina and Allen, T. R.},
abstractNote = {We have examined microstructural evolution in irradiated ceria (CeO2) using swift heavy ion irradiation, electron microscopy, and atomistic simulation. CeO2, a UO2 fuel surrogate, was irradiated with gold ions at an energy of 1 GeV to fluences up to 1x1014 ions/cm2. Transmission electron microscopy accompanied by electron energy loss spectroscopy showed that the ion tracks were of similar size at all fluences, and that there was no chemical change in the ion track core. Classical molecular dynamics simulations of thermal spikes in CeO2 with energy deposition of 12 and 36 keV/nm show damage consisting of isolated point defects at the lower energy and defect clusters at 36 keV/nm, with no amorphization at either energy. Inferences are drawn from modeling about density changes in the ion track and the formation of interstitial loops that shed light on features observed by electron microscopy of swift heavy ion irradiated ceria.},
doi = {10.1557/jmr.2015.43},
journal = {Journal of Materials Research, 30(9):1473-1484},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {5}
}