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

作者：Ishii Keizo^*; Hatakeyama Taisuke; Itoh Shin; Sata Daichi; Ohnuma Tohru; Yamaguchi Toshiro; Arai Hiromu; Arai Hirotsugu; Matsuyama Shigeo; Terakawa Atsuki; Kim Seong Yun

来源：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms , 2016, 371: 387-391.

DOI：10.1016/j.nimb.2015.09.054

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

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 mu m 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 mu m. This information is useful for the decontamination of silt contaminated by radiation from the Fukushima Daiichi nuclear disaster.

• 出版日期2016-3-15