Ne2+ Ion Irradiation Induced Swelling Effects in Pyrochlore Ho2Ti2O7 by Using a GIXRD Technique

作者：Li Yu-Hong^*; Xu Chun-Ping; Gao Chao; Wang Zhi-Guang

来源：Chinese Physics Letters, 2011, 28(6): 066102.

DOI：10.1088/0256-307X/28/6/066102

• CROSS-SECTIONAL TEM
• LEVEL NUCLEAR-WASTE
• RADIATION TOLERANCE
• BEAM IMPLANTATION
• IMMOBILIZATION
• PLUTONIUM
• CERAMICS
• OXIDES

We carry out 400 keV Ne2+ ion irradiation damage experiments at cryogenic temperature (about 77 K) on poly-crystalline Ho2Ti2O7 pyrochlore. The irradiation fluences range from 2x10(14) to 1.3x10(15) ions/cm(2), corresponding to the peak ballistic displacement damage of 0.075-0.487 in units of displacement per atom (dpa). The value indicates the statistical average of the fractional number of lattice atoms which have experienced a lattice displacement. Irradiation-induced structural evolution is examined by using grazing incidence x-ray diffraction (GIXRD) at x-ray angles. gamma = 0.25 degrees and 3 degrees. It is found that the irradiated layer is volumetrically swelled as compared with the underlying non-irradiated substrate and the volume increase in the irradiated layer is contributed mainly to the irradiated ion fluence.

• 出版日期2011-6
• 单位兰州大学; 中国科学院近代物理研究所