Alpha-radiation effects of Gd2Zr2O7 bearing simulated multi-nuclides
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In order to explore the radiation effects of Gd2Zr2O7 bearing multi-nuclides, the compounds with simulated typical waste after trialkyl phosphine oxides (TRPO) process were taken for this research. The pyrochlore-type compound (containing Zr4+, Mo6+, Ru4+, and Pd2+) were irradiated using 0.5 MeV He2+ ions at room temperature, with fluences ranging from 1 × 1015 ions/cm2 up to 1 × 1017 ions/cm2. The results discovered that the compound transformed from pyrochlore to fluorite phase after irradiation. Besides, a slight structural disordering and lattice swelling were observed. Furthermore, the microtopography of the irradiated ceramics was kept, and no aggregation of elements appeared on the He2+ ion irradiated surface.
KeywordsPyrochlore ceramic Multi-nuclides TRPO waste Irradiation Structure distortion
The authors express deep appreciation to Jing Chen, Jianchen Wang, and Mingfen Wen in Tsinghua University for providing the formulation of the typical TRPO waste, and thanks a lot to Jinyu Li for his experimental supporting in 320 kV multi-discipline research platform for highly charged ions at the Chinese Academy of Sciences.
The authors received financial support from the National Natural Science Foundation of China (No. 2150715 and No. 41574100), Foundation of Fundamental Science on Nuclear Wastes, and Environmental Safety Laboratory, Southwest University of Science and Technology (No. 15yyhk10).
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