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 ; Baba, Yuji ; Hirao, Norie; Hori, Fuminobu*; Matsui, Toshiyuki*; Iwase, Akihiro*

In present light-water nuclear power plants, it is useful to dope some elements, which have a high neutron absorption cross section, into fuels (UO $_{2}$ ) in order to control the initial reactivity. During the operation of reactors, UO $_{2}$ fuels are exposed to irradiation with high energy fission products which have energies around 100 MeV. Therefore, it is important to study the effects of high energy fission products on UO $_{2}$ fuels. Cerium dioxide (CeO $_{2}$ ) has been used so far as a simulation material for UO $_{2}$ because it has the same fluorite structure as that of UO $_{2}$ . In this study, CeO $_{2}$ pellets doped with Gd $_{2}$ O $_{3}$ were irradiated with 200 MeV Xe $^{14+}$ ions to simulate the irradiation effects of high energy fission products on UO $_{2}$ doped with Gd $_{2}$ O $_{3}$ . The X-ray diffraction spectra show that the lattice constant of CeO $_{2}$ increases with increasing the amount of the Gd-doping. In addition, it also increases by the irradiation and the effect of the irradiation becomes more remarkable by doping Gd $_{2}$ O $_{3}$ .

Language	:	English
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Meeting title	:	24th International Conference on Atomic Collisions in Solids (ICACS-24)
Held date	:	2010/07
Location (city)	:	Krakw
Location (country)	:	Poland
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Cooperating Institute	:	大阪府立大学

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Registration No. : BB20103261
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Study on effects of swift heavy ion irradiation on the crystal structure in CeO doped with GdO

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