Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5477571 | Journal of Environmental Radioactivity | 2017 | 6 Pages |
Abstract
Evaluation of vertical distribution of radiocesium in bottom sediment by measuring vertical γ-ray count profile was discussed. A stable inversion formula was derived based on the maximum entropy method. Efficiency of the formula was confirmed by using a low-cost apparatus composed of an array of PIN photodiodes and a single board computer with real-time inversion code. In-door experiment by using five model sediment disks showed good reproducibility of vertical radiocesium profile. On-site experiment was also carried out at a pond in Fukushima to confirm the efficiency. It was suggested that combination of the simple apparatus and MEM inversion formula gave reasonable estimates on vertical radiocesium distribution in bottom sediment of 1 kBq/kg-wet level within about 10 min.
Related Topics
Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
Hiroshi Ogawa, Kimitaka Minami, Tohru Kawamoto, Ramon Kanai, Kohei Ishikawa, Ryuichi Kamimura,