| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-04-17 |
| タイトル |
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タイトル |
Improvement of spectral analysis using a NaI(Tl) scintillation spectrometer to evaluate ambient gamma dose rates from primordial radionuclides |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Yasutaka Omori
Atsuyuki Sorimachi
Masahiro Hosoda
Sarata Kumar Sahoo
Norbert Kavasi
Osamu Kurihara
Shinji Tokonami
Tetsuo Ishikawa
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
In-situ measurements by gamma-ray spectrometry using a NaI(Tl) scintillation spectrometer are performed to discriminate primordial and artificial radionuclides contributing to ambient gamma dose rates in the living environment to quantify prolonged influence of nuclear accidents. However, low energy resolution of the spectrometer causes poor discrimination in the measurements at high-dose-rate points, which leads to overestimation of ambient gamma dose rate from the primordial radionuclides. The present study clarified that photon fluxes originating from 40K and 214Bi were affected by the presence of 134Cs, whereas those from 208Tl were independent of it. In addition, the absorbed dose rates in air were strongly correlated with the 208Tl photon fluxes. These findings indicate that 208Tl photon fluxes can be used to evaluate absorbed dose rates in air from the primordial radionuclides. When estimated from the 208Tl photon fluxes only, the absorbed dose rates in air in Namie Town and Okuma Town, locations affected by the Fukushima Dai-ichi Nuclear Power Plant accident, were 19?71 and 20?47 nGy h?1, respectively. |
| 書誌情報 |
Radiation Protection Dosimetry
巻 199,
号 18,
p. 2233-2237,
発行日 2023-11
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| 出版者 |
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出版者 |
Oxford |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1742-3406 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1093/rpd/ncad258 |
