Damage Creation in Ion-Irradiated CeO2
نویسندگان
چکیده
It is known that high-energy fission products create serious damage in the crystal structure of nuclear fuel ceramics (UO2), leading to swelling and degradation of thermal properties. The damage process, being particularly important in the high-energy region, is investigated in this study. Cerium dioxide, CeO2, is one of the ceramics that have the same (fluorite) structure as UO2 and also a similar melting temperature. Therefore, in this study CeO2 functioning as a simulation material is irradiated with highenergy projectiles. It is already known that ion tracks are formed in CeO2 by 210-MeV Xe irradiation [1]. The ion track has typically a diameter of several nanometers. The crystal lattice inside the track is not amorphized. The purpose of our study is to analyze the change in crystal structure which reflects the formation of ion tracks. X-ray diffraction (XRD) is used to evaluate the crystal structure modification.
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تاریخ انتشار 2009