TY - JOUR
T1 - Nucleation and growth of defect clusters in CeO2 irradiated with electrons
AU - Yasunaga, K.
AU - Yasuda, K.
AU - Matsumura, S.
AU - Sonoda, T.
N1 - Funding Information:
This study was financially supported by the Budget for Nuclear Research of the Ministry of Education, Culture, Sports, Science and Technology, based on screening and counseling by the Atomic Energy Commission.
PY - 2006/9
Y1 - 2006/9
N2 - Nucleation and growth process of defect clusters in cerium dioxide (CeO2) with fluorite-type crystal structure has been investigated in situ under electron irradiation by using high voltage transmission electron microscopy. Planar defect clusters were formed with electron irradiation ranging from 200 to 1000 keV at temperatures below 450 K. The defect clusters were determined to be faulted-interstitial type dislocation loops lying on {1 1 1} planes. The growth rate of dislocation loops was found to increase with decreasing electron energy. An analysis of the fluence dependence of the growth process of dislocation loops suggests an increase in the vacancy mobility with decreasing electron energy. The rate of the electronic excitation is discussed in terms of the radiation-induced diffusion of oxygen-ion vacancies.
AB - Nucleation and growth process of defect clusters in cerium dioxide (CeO2) with fluorite-type crystal structure has been investigated in situ under electron irradiation by using high voltage transmission electron microscopy. Planar defect clusters were formed with electron irradiation ranging from 200 to 1000 keV at temperatures below 450 K. The defect clusters were determined to be faulted-interstitial type dislocation loops lying on {1 1 1} planes. The growth rate of dislocation loops was found to increase with decreasing electron energy. An analysis of the fluence dependence of the growth process of dislocation loops suggests an increase in the vacancy mobility with decreasing electron energy. The rate of the electronic excitation is discussed in terms of the radiation-induced diffusion of oxygen-ion vacancies.
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U2 - 10.1016/j.nimb.2006.04.091
DO - 10.1016/j.nimb.2006.04.091
M3 - Article
AN - SCOPUS:33746533922
SN - 0168-583X
VL - 250
SP - 114
EP - 118
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
IS - 1-2 SPEC. ISS.
ER -