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Assessment of gamma radiation from a limited area of forest floor using a cumulative personal dosimeter
https://repo.qst.go.jp/records/75537
https://repo.qst.go.jp/records/755375a4ad455-deeb-47d7-8e8a-fe76e3846a37
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-04-04 | |||||
| タイトル | ||||||
| タイトル | Assessment of gamma radiation from a limited area of forest floor using a cumulative personal dosimeter | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Toshihiro, Yoshihara (CRIEPI)
× Toshihiro, Yoshihara (CRIEPI)× 栗田, 圭輔× Hideyuki, Matsumura (CRIEPI)× Vasyl, Yoschenko (Fukushima Univ.)× 河地, 有木× Shin-Nosuke, Hashida (CRIEPI)× Alexei, Konoplev (CRIEPI)× Hirohisa, Yoshida (Tokyo Metropolitan Univ.)× Kurita, Keisuke× Kawachi, Naoki |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | To elucidate long term changes in gamma radiation from a limited region of interest of the forest floor, a simple monitoring procedure using a cumulative personal dosimeter (D-shuttle) was examined from 2016 to 2017. The test site was in a small forest in Abiko, Japan, where the initial radiocesium contamination from the Fukushima Dai-ichi Nuclear Power Plant was 60–100 kBq m−2. Three experimental plots basically containing a set of two 5 × 5 m2 observation areas were arranged at the site. The litterfall and decomposing organic layer of one area (D: decontaminated) were fully eliminated before the monitoring, whereas the other area (N: natural) was left unchanged. Five D-shuttle sets (i.e., D-shuttle, lead shield, and holder) per area were set up. One D-shuttle set could monitor the specific gamma radiation from radiocesium distributed within a limited area of ground (0.5 m radius of circle = ca. 0.8 m2 area of flat ground). The results indicated significant differences in the accumulated doses among each of the plots and areas, reflecting their soil radiocesium inventories. Interestingly, every index decreased with time, but the decreases were slower than the theoretical decay of radiocesium (1 34Cs and 1 37Cs). In addition, the accumulated dose decreased during heavy rainfall events. One possible explanation for these changes of the accumulated dose is a combination of meteorological and tree phenological phenomena, such as radiocesium from the forest canopy being newly added to the floor primarily by litterfall and soil moisture content disturbing radiation emitted from soils. This simple procedure enables long-term observation of gamma radiation from a limited area of forest floor non-invasively and semi-quantitatively. | |||||
| 書誌情報 |
Journal of Environmental Radioactivity 巻 204, p. 95-103, 発行日 2019-08 |
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| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0265-931X | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.jenvrad.2019.03.023 | |||||
| 関連サイト | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1016/j.jenvrad.2019.03.023 | |||||
