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Study on effects of swift heavy ion irradiation on the crystal structure in CeO$$_{2}$$ doped with Gd$$_{2}$$O$$_{3}$$

Tahara, Yuki*; Zhu, B.-L.*; Kosugi, Shinya*; Ishikawa, Norito   ; Okamoto, Yoshihiro  ; Hori, Fuminobu*; Matsui, Toshiyuki*; Iwase, Akihiro*

CeO$$_{2}$$ pellets doped with Gd$$_{2}$$O$$_{3}$$ were irradiated with 200-MeV Xe ions, and the effects of Gd$$_{2}$$O$$_{3}$$-doping and irradiation on the lattice structure were measured using XRD and EXAFS. The lattice constant decreases with increasing Gd$$_{2}$$O$$_{3}$$-doping and the local structure near the Gd atoms is more disordered with increasing amounts of Gd$$_{2}$$O$$_{3}$$-dopant. The irradiation induces an expansion of the lattice and disordering of the atomic arrangement around Gd atoms. The effect of high-energy ion irradiation becomes more pronounced with increasing amounts of Gd$$_{2}$$O$$_{3}$$-dopant.

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Category:Instruments & Instrumentation

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