Application of micron X-ray CT based on micro-PIXE to investigate the distribution of Cs in silt particles for environmental remediation in Fukushima Prefecture

Keizo Ishii, Taisuke Hatakeyama, Shin Itoh, Daichi Sata, Tohru Ohnuma, Toshiro Yamaguchi, Hiromu Arai, Hirotsugu Arai, Shigeo Matsuyama, Atsuki Terakawa, Seong Yun Kim

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We used X-ray computed tomography (CT) using characteristic X-rays produced in micro-particle-induced X-ray emission (PIXE) to investigate the internal structure of silt particles and develop new methods to decontaminate soil containing radioactive cesium. We obtained 3D attenuation coefficient images of silt particles with a diameter of approximately 100 μm for V K and Cr K X-rays. Owing to the absorption edges of the Cs L-shell, the differences between the V K and Cr K X-ray images revealed the spatial distribution of Cs atoms in the silt particles. Cs atoms were distributed over the surfaces of the silt particles to a thickness of approximately 10 μm. This information is useful for the decontamination of silt contaminated by radiation from the Fukushima Daiichi nuclear disaster.

Original languageEnglish
Pages (from-to)387-391
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume371
DOIs
Publication statusPublished - 2016 Mar 15

Keywords

  • Decontamination of radioactive soil
  • Fukushima Daiichi nuclear disaster
  • Micro-PIXE
  • Radioactive pollution
  • X-ray micron CT

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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