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 (103)：

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
Takuma Hasegwa, Kotaro Nakata, Yuichi Tomioka, Tomoko Ohta, Shunichi Okamoto, Atsunao Marui, Isao Machida, Reo Ikawa, Masahiko Ono, Shinji Matsumoto. Identification of modern meteoric water, glacial meteoric water, and fossil seawater in a deep borehole at the coastal area of Horonobe, north Japan, using groundwater dating and paleoclimatic proxy methods. Chemical Geology. 2024
T. Ohta, Y. Mahara, S. Fukutani, T. Kubota. Concentration of 137Cs in litter in Quercus serrata and Cryptomeria japonica forests. KURNS Progress report 2023. 2024
Tomoko Ohta, L. Keith Fifield, László Palcsu, Stephen G. Tims, Stefan Pavetich, Yasunori Mahara. Record of 3H and 36Cl from the Fukushima nuclear accident recovered from soil water in the unsaturated zone at Koriyama. Scientific Reports. 2023

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MISC (60)：

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 (120)：

Validation of 129I groundwater dating calibrated with 81Kr and 4He - Towards groundwater flow assessment for HLW geological disposal in Japan-
(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)
浜里沿岸地下水中の81Kr年代測定法を基にした核実験前の海洋中の129I/127I同位体比の初期値推定
(日本地下水学会2024年秋季講演会 2024)
長岡地域における地下水中ラドン濃度の季節変動調査
(日本地下水学会2024年秋季講演会 2024)
三軸試験装置を用いた豊浦砂の222Rn溶出実験の試み
(日本地下水学会2024年秋季講演会 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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