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  1. 原著論文

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/75537
5a4ad455-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)

WEKO 761433

Toshihiro, Yoshihara (CRIEPI)

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栗田, 圭輔

× 栗田, 圭輔

WEKO 761434

栗田, 圭輔

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Hideyuki, Matsumura (CRIEPI)

× Hideyuki, Matsumura (CRIEPI)

WEKO 761435

Hideyuki, Matsumura (CRIEPI)

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Vasyl, Yoschenko (Fukushima Univ.)

× Vasyl, Yoschenko (Fukushima Univ.)

WEKO 761436

Vasyl, Yoschenko (Fukushima Univ.)

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河地, 有木

× 河地, 有木

WEKO 761437

河地, 有木

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Shin-Nosuke, Hashida (CRIEPI)

× Shin-Nosuke, Hashida (CRIEPI)

WEKO 761438

Shin-Nosuke, Hashida (CRIEPI)

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Alexei, Konoplev (CRIEPI)

× Alexei, Konoplev (CRIEPI)

WEKO 761439

Alexei, Konoplev (CRIEPI)

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Hirohisa, Yoshida (Tokyo Metropolitan Univ.)

× Hirohisa, Yoshida (Tokyo Metropolitan Univ.)

WEKO 761440

Hirohisa, Yoshida (Tokyo Metropolitan Univ.)

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Kurita, Keisuke

× Kurita, Keisuke

WEKO 761441

en Kurita, Keisuke

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Kawachi, Naoki

× Kawachi, Naoki

WEKO 761442

en 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
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
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