Microstructure damage of titanium films by irradiation with fission fragments

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  • Radiation damage caused by fission fragments to metal surfaces is an important research topic. Thin titanium foils were irradiated with a continuous wave beam of 132 MeV ¹³²Xe+²⁹ at the current intensity of 2 pnA. Pre- and post-irradiated surface topologies were investigated using atomic force microscopy and the observed defects were quantified by root mean square roughness, depth profile of the disordered zones, size and areal density of the voids, and discussed as a function of the applied fluencies (1– 9) 10¹³ Xe/cm². The first ellipsoidal dislocation loops appeared at the fluence of 3.0 10¹³ Xe/cm² with the areal density of 1.56 10⁶/cm² that increased to 2.0 10⁷ cm ⁻² when the dose rose to 9.0 10¹³ Xe/ cm2. At this point also the first dislocation lines with the density of 1.3 10⁷ cm ⁻² were seen. Our results suggest that the fission fragments might maximize large voids and dislocations and increase the degradation in depth resolution.
  • Keywords: Voids, Dislocation lines, Dislocation loop, Titanium, Radiation damage
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  • Sadi, S., Paulenova, A., Loveland, W., Watson, P., Greene, J., & Zinkann, G. (2011). Microstructure damage of titanium films by irradiation with fission fragments. Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms, 269(24), 3230-3232. doi: 10.1016/j.nimb.2011.04.093
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  • 269
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  • 24
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