Ohta Tomoko

オオタトモコ | Ohta Tomoko

Affiliation and department：
Job title： associate professor
Research theme for competitive and other funds (9)：

2021 - 2025 過去100万年規模の宇宙線起源81Kr変遷の復元による地下水絶対年代測定法の提案
2020 - 2025 マルチトレーサ法を用いた129I/127I地下水年代測定法の成立性の検証
2022 - 2024 広域大気静電場観測に基づく大地震直前予知の実現性評価
2017 - 2020 Elucidation of accumulation mechanism of radioceium in tree and fate of radio-cesium contamination in forest resources
2014 - 2017 Evaluation and designing of adsorption layer method for countermeasures against excavated rocks

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Papers (107)：

Tomoko Ohta, Yasunori Mahara, Hiroyuki Matsuzaki, Tsuyoshi Abe, Hiroharu Matsueda. Variations in the 129I/127I ratios of pre-world war II algae under long-term exposure to atmospheric iodine isotopes. Marine Pollution Bulletin. 2026. 223. 118937-118937
Tomoko Ohta, Keith Fifield, László Palcus, Stephen Tims, Stefan Pavetich, Hiroyuki Matsuzaki, Daisuke Tsumune, Yasunori Mahara. Record of the Fukushima nuclear accident in unsaturated soil water and the fate of nuclear contamination. 2025
Tomoko Ohta, Takuma Hasegawa, Wei Jiang, Guo Min Yang, Zheng-Tian Lu, Yasunori Mahara. Author Correction: Feasibility of 129I groundwater dating calibrated by both 81Kr and 4He for the assessment of deep geological repositories in Japan. Scientific Reports. 2024. 14. 1
Tomoko Ohta, Takuma Hasegawa, Wei Jiang, Guo Min Yang, Zheng-Tian Lu, Yasunori Mahara. Feasibility of 129I groundwater dating calibrated by both 81Kr and 4He for the assessment of deep geological repositories in Japan. Scientific Reports. 2024. 14. 1
Tomoko Ohta, Satoshi Fukutani, Takumi Kubota, Yasunori Mahara. Tritium concentration in the modern commercial D2O reagents. Analytical Sciences. 2024

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MISC (61)：

太田朋子, L. Keith Fifield, László Palcsu, Stephen G. Tims, Stefan Pavetich, 馬原保典. 福島の土壌水・浅層地下水中のトリチウムとその由来. 日本地下水学会春季講演会講演予稿. 2024
JUAN WEN, Taichi SUGAI, Tomoko OHTAy, Akira TOKUCHI, Weihua JIANG. Relation Between Wide-Area Atmospheric Electric Field and Radiation Induced Ionization. 2023. EPP23026-EPP23026
Tomoko Ohta, Tatsuya Suzuki, HIsayuki Suematsu, akashi kikuchi, yuki uchida, Weihua JIANG. Radiation experiment for elementary school students- from atomic radiation basic education to visualization of the safety of HLW nuclear species disposal in the deep underground. 2022. 2P27-2P27
Ryo Takeo, Tomoko Ohta. Impact of geographic conditions on groundwater radon concentration. 2022
Tomoko ohta. Behavior of radiocesium in tree-application to forestry hydrology-. Abstracts of Annual Meeting of the Geochemical Society of Japan (Web). 2022. 69. 89

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Lectures and oral presentations (128)：

新潟県長岡地域における地下水ラドン濃度の季節変動
(日本原子力学会関東甲越支部第18回学生研究発表会 2025)
辺材・心材および根に含まれる放射性セシウムの蓄積量調査
(日本原子力学会関東甲越支部第18回学生研究発表会 2025)
降水中に含まれる36Clの降下量と季節変動および成分分析
(日本原子力学会関東甲越支部第18回学生研究発表会 2025)
Validation of 129I groundwater dating calibrated with 81Kr and 4He - Towards groundwater flow assessment for HLW geological disposal in Japan-
(IAEA Technical Meeting on the Application of Atom Trap Trace Analysis in Water Resource Management 2024)
三軸試験装置を用いた砂の222Rn溶出実験の試み
(第45回地盤工学若手セミナー 2024)

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Professional career (1)：

Awards (4)：

2021 - JNST most cited article award Analysis of cesium isotope compositions in environmental samples by thermal ionization mass spectrometry - 1. A preliminary study for source analysis of radioactive contamination in Fukushima prefecture
2020 - 日本原子力学会バックエンド部会奨励賞高レベル放射性廃棄物の地層処分のための放射性Krを用いた地下水年代測定技術の開発および水環境中の放射性Csと129Iの動態に関する研究
2013/10 - Analytical Sciences Hot article award Analytical Sciences Aging effect of 137Cs obtained from 137Cs in the Kanto loam layer from the Fukusima nuclear power plant accident and in the Nishiyama loam layer from the Nagasaki A-bomb explosion
2005 - 日本アイソトープ協会 2004年度Radioisotopes 論文奨励賞受賞 Collection of radium isotopes in natural waters by manganese-impregnated acrylic fiber

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