研究者詳細 - 赤田　尚史

論文 - 赤田　尚史

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Measurement and analysis of long-term variation of atmospheric (7)Be activity concentrations in Dazaifu (western Japan).

Narazaki Y, Sakoda A, Akata N, Itoh H, Momoshima N

Journal of environmental radioactivity 284 107612 - 107612 2025年04月

Elevated levels of tritium in surface water collected in the immediate aftermath of the Fukushima accident.

Kheamsiri K, Anderson D, Tazoe H, Okada K, Otashiro N, Kuwata H, Kakiuchi H, Hosoda M, Kovács T, Tokonami S, Akata N

Environmental pollution 126040 - 126040 2025年03月

Fukushima's Tap and Groundwater a Decade after the Nuclear Accident with Radiocesium, Tritium, and Radon.

Anderson D, Oda Y, Taira Y, Omori Y, Tazoe H, Akata N, Kranrod C, Yamada R, Kuwata H, Tamakuma Y, Kudo H, Osanai M, Nishimura N, Yasuoka Y, Sanada T, Hosoda M, Tokonami S

Environmental science & technology 2025年03月

Natural gamma dose rate and radioactivity concentrations at a former tin mining area in Kanchanaburi, Thailand

Saowarak Musikawan, Worawat Poltabtim, Khemruthai Kheamsiri, Chutima Kranrod, Theerawat Pluemjit, Kitkawin Aramrun, Yasutaka Omori, Hirofumi Tazoe, Masahiro Hosoda, Naofumi Akata, Shinji Tokonami

Journal of Radioanalytical and Nuclear Chemistry 2025年03月

A Bioassay Analysis of Uranium and Lead in Urine Samples from a High Natural Background Radiation Area in Indonesia

Very Susanto, Radhia Pradana, Eka Djatnika Nugraha, Prihadi Sumintadireja, Oumar Bobbo Modibo, Ilsa Rosianna, Nastiti Rahajeng, Haeranah Ahmad, Rusbani Kurniawan, Leons Rixson, Atika Yuningsih, Yusraini Dian Inayati Siregar, Asep Saepuloh, Wahyudi Wahyudi, Hirofumi Tazoe, Naofumi Akata, Shinji Tokonami

Environments 12 ( 2 ) 51 - 51 2025年02月

Ecological and Health Risks from Trace Elements Contamination in Soils at the Rutile Bearing Area of Akonolinga, Cameroon

Fayette Kitcha Sime, Dieu Souffit Gondji, Ilsa Rosianna, Eka Djatnika Nugraha, Oumar Bobbo Modibo, Chutima Kranrod, Yasutaka Omori, Naofumi Akata, Masahiro Hosoda, Saïdou, Shinji Tokonami

Applied Sciences 2024年11月

Atmospheric concentrations of 7Be and 210Pb in weekly aerosols at Hirosaki, a heavy snowfall area in Japan.

Kheamsiri K, Modibo OB, Hadi BSW, Kuwata H, Yamada R, Kranrod C, Akata N

Radiation protection dosimetry 200 ( 16-18 ) 1782 - 1786 2024年11月

Tritium determination in natural water samples in Fukushima from 2022 to 2023 using an ultra-low-level tritium counting system.

Hegedűs M, Kuwata H, Kheamsiri K, Novák M, Yamada R, Akata N, Kovács T

Radiation protection dosimetry 200 ( 16-18 ) 1845 - 1849 2024年11月

Tritium concentration in monthly precipitation in Okinawa and Kagoshima, southern Japan.

Akata N, Ohno K, Kuwata H, Kheamsiri K, Yoshinaka Y, Yamada R, Kitayama Y, Aizawa S, Nakasone S, Ishimine A, Tanaka M, Shiroma Y, Tokonami S, Furukawa M

Radiation protection dosimetry 200 ( 16-18 ) 1792 - 1796 2024年11月

Study of seasonal variation of accident-derived atmospheric radiocesium in Koriyama City, Fukushima Prefecture, Japan during 2011-2014.

Hasegawa H, Akata N, Okuyama K, Ochiai S, Kakiuchi H, Ueda S

Radiation protection dosimetry 200 ( 16-18 ) 1829 - 1834 2024年11月

Optimization of pretreatment protocol for strontium-90 analysis in marine fish bone samples.

Tazoe H, Amano Y, Ishida Y, Yamada M, Akata N

Radiation protection dosimetry 200 ( 16-18 ) 1861 - 1866 2024年11月

Impacts of the large fusion test facility on tritium in environmental water and natural radiation levels.

Tanaka M, Kurita S, Akata N

Radiation protection dosimetry 200 ( 16-18 ) 1802 - 1806 2024年11月

Evaluation of combustion system for organically bound tritium analysis using dried fish samples.

Kuwata H, Yamada R, Kheamsiri K, Kakiuchi H, Tamari T, Shima N, Akata N

Radiation protection dosimetry 200 ( 16-18 ) 1807 - 1812 2024年11月

Development of evaluation method for radiocesium availability in soil by biomimetic approach.

Takeda A, Unno Y, Swallow MJB, Yagasaki Y, Yasutaka T, Akata N

Radiation protection dosimetry 200 ( 16-18 ) 1767 - 1771 2024年11月

Characteristics of tritium, stable isotopes and chemical components in monthly precipitation at Hiroshima, Japan.

Yamada R, Kuwata H, Kheamsiri K, Ohno K, Kitayama Y, Yoshinaka Y, Yoshinaga S, Kurita N, Akata N

Radiation protection dosimetry 200 ( 16-18 ) 1797 - 1801 2024年11月

Behavior of radioactive cesium concentration for 13 years after FDNPP accident at Koriyama campus of Nihon University, Fukushima, Japan.

Suzuki R, Okuyama K, Chiba K, Hashimoto T, Katsumata N, Ukitsu A, Kheamsiri K, Yamada R, Akata N

Radiation protection dosimetry 200 ( 16-18 ) 1835 - 1839 2024年11月

Interlaboratory Comparison in Japan for Radon Determination in Water

Shunya NAKASONE, Akinobu ISHIMINE, Yuki TAMAKUMA, Masahiro HOSODA, Naofumi AKATA, Tetsuya SANADA, Masahiro TANAKA, Sumi YOKOYAMA, Minoru SAKAMA, Akira TANAHARA, Masahide FURUKAWA, Shinji TOKONAMI, Yumi YASUOKA, Yoshitaka SHIROMA

Japanese Journal of Health Physics 59 ( 3 ) 131 - 134 2024年10月

Variation analysis of atmospheric (7)Be activity concentrations with respect to precipitation.

Narazaki Y, Sakoda A, Akata N, Itoh H, Momoshima N

Journal of environmental radioactivity 277 107432 - 107432 2024年07月

Tissue-free water tritium and non-exchangeable organically bound tritium concentrations in fish near coastline during and after operation of Japan's first nuclear fuel reprocessing facility.

Akata N, Anderson D, Kakiuchi H, Yamada R, Hasegawa H, Ueda S

The Science of the total environment 947 174404 - 174404 2024年07月

六ケ所再処理工場のアクティブ試験時における環境放射能 —放出された放射性物質の環境への影響について—

植田真司，長谷川英尚，柿内秀樹，大塚良仁，阿部康一，赤田尚史，落合伸也

RADIOISOTOPES 73 ( 1 ) 81 - 99 2024年03月

Temporal variation of tritium concentration in monthly precipitation collected at a Difficult-to-Return Zone in Namie Town, Fukushima Prefecture, Japan.

Yamada R, Hasegawa H, Akata N, Kakiuchi H, Ochiai S, Kuwata H, Kheamsiri K, Tokonami S, Ueda S

Environmental science and pollution research international 31 ( 5 ) 7818 - 7827 2024年01月

Assessing the variability of tissue-free water tritium and non-exchangeable organically bound tritium in pine needles in Fukushima using atmospheric tritrated water vapor

Shigekazu Hirao, Hideki Kakiuchi, Naofumi Akata, Toshiya Tamari, Shinji Sugihara, Nagayoshi Shima, Masahiro Tanaka

Science of The Total Environment 907 2024年01月

環境中のトリチウムとその挙動

赤田尚史

アイソトープ・放射線研究発表会 4 ( 0 ) 3 2024年

Uranium Isotope Characterization in Volcanic Deposits in a High Natural Background Radiation Area, Mamuju, Indonesia

Ilsa Rosianna, Eka Djatnika Nugraha, Hirofumi Tazoe, Heri Syaeful, Adi Gunawan Muhammad, I Gde Sukadana, Frederikus Dian Indrastomo, Ngadenin, Fadiah Pratiwi, Agus Sumaryanto, Sucipta Sucipta, Hendra A. Pratama, Deni Mustika, Leli Nirwani, Nurokhim, Yasutaka Omori, Masahiro Hosoda, Naofumi Akata, Shinji Tokonami

Geosciences 13 388 2023年12月

Calibration experiments for radon in drinking water measurements using portable-type electrostatic-collection radon monitors

Masahiro Hosoda, Yasutaka Omori, Hiroki Hashimoto, Maho Matsumoto, Yumi Yasuoka, Tetsuya Sanada, Yuki Oda, Mizuki Kiso, Aoi Sampei, Chutima Kranrod, Hirofumi Tazoe, Naofumi Akata, Yasuyuki Taira, Yuki Tamakuma, Ryohei Yamada, Hiromi Kudo, Mayumi Shimizu, Shinji Tokonami

Radiation Protection Dosimetry 199 ( 18 ) 2203 - 2206 2023年11月

Tritium concentration in bottled drinking water and internal dose assessment

Khemruthai Kheamsiri, Naofumi Akata, Haruka Kuwata, Masahiro Tanaka, Masahiro Hosoda, Michiya Sasaki, Yoshitaka Shiroma, Shinji Tokonami, Ryohei Yamada, Chutima Kranrod, Kazuki Iwaoka, Tibor Kovάcs

Journal of Radioanalytical and Nuclear Chemistry 333 ( 5 ) 2597 - 2603 2023年07月

Environmental radioactivity measurements in soil using inductively coupled plasma mass spectrometry and gamma-ray spectrometry in various areas in Cameroon

Modibo Oumar Bobbo, Guosheng Yang, Saïdou, Hirofumi Tazoe, Naofumi Akata, Chutima Kranrod, Masahiro Hosoda, Shinji Tokonami

Journal of Radioanalytical and Nuclear Chemistry 2023年07月

弘前大学高度被ばく医療支援センターにおける内部被ばく線量評価のためのバイオアッセイへの取り組み

山田椋平, 小山内理, 赤田尚史, 田副博文, 辻口貴清, 伊藤勝博, 花田裕之, 床次眞司, 柏倉幾郎

保健物理 58 ( 1 ) 27 - 30 2023年04月

Tritium Concentration in Natural Spring Water Collected at Hirosaki, Japan

Naofumi AKATA, Kazusa OKADA, Haruka KUWATA, Khmruthai KHEAMSIRI, Masahiro HOSODA, Hirofumi TAZOE, Ryo YASUHARA, Shinji SUGIHARA, Ryohei YAMADA, Masahiro TANAKA

Plasma and Fusion Research 18 2405030 - 2405030 2023年04月

国内における自然起源放射性物質（NORM）への対応

山田椋平, 富坂侑斗, 岩岡和輝, 赤田尚史

保健物理 57 ( 4 ) 181 - 185 2023年02月

Spatial variations of 10Be in surface snow along the inland traverse route of Japanese Antarctic Research Expeditions

Kazuho Horiuchi, Shinji Kato, Kou Ohtani, Naoyuki Kurita, Shun Tsutaki, Fumio Nakazawa, Hideaki Motoyama, Kenji Kawamura, Hirofumi Tazoe, Naofumi Akata, Takeyasu Yamagata, Hiroyuki Matsuzaki

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 533 61 - 65 2022年12月

LEVELS OF ATMOSPHERIC TRITIUM IN THE SITE OF FUSION TEST FACILITY.

Tanaka M, Iwata C, Nakada M, Kato A, Akata N

Radiation protection dosimetry 198 ( 13-15 ) 1084 - 1089 2022年09月

TRITIUM CONCENTRATION IN MONTHLY PRECIPITATION NEAR THE FUSION TEST FACILITY IN JAPAN BEFORE AND AFTER THE DEUTERIUM PLASMA EXPERIMENT.

Akata N, Iwata C, Nakada M, Kato A, Okada K, Kuwata H, Nakasone S, Tanaka M

Radiation protection dosimetry 198 ( 13-15 ) 976 - 984 2022年09月

TEMPORAL VARIATION OF POST-ACCIDENT 129I IN ATMOSPHERIC PARTICULATE MATTER COLLECTED FROM AN EVACUATED AREA OF FUKUSHIMA PREFECTURE, JAPAN.

Hasegawa H, Kakiuchi H, Ochiai S, Akata N, Ueda S, Tokonami S

Radiation protection dosimetry 198 ( 13-15 ) 1143 - 1149 2022年09月

SPECIATION OF CESIUM ISOTOPES IN RIVER WATER: A CASE STUDY IN THE UKEDO RIVER.

Tazoe H, Tachizaki R, Tomisaka Y, Kuwata H, Akata N

Radiation protection dosimetry 198 ( 13-15 ) 1077 - 1083 2022年09月

PERFORMANCE EVALUATION OF COMMERCIAL SCINTILLATION COCKTAILS FOR LOW-LEVEL TRITIUM COUNTING BY HIGH-CAPACITY LIQUID SCINTILLATION COUNTER.

Kuwata H, Tazoe H, Kranrod C, Fujiwara K, Terashima M, Matsueda M, Hirao S, Akata N

Radiation protection dosimetry 198 ( 13-15 ) 1014 - 1018 2022年09月

INFLUENCE OF SAMPLING FLOW RATE ON THORON EXHALATION RATE MEASUREMENTS BY THE CIRCULATION METHOD.

Hosoda M, Yamada R, Kobyashi H, Tamakuma Y, Nugraha ED, Hashimoto H, Negami R, Kranrod C, Omori Y, Tazoe H, Akata N, Tokonami S

Radiation protection dosimetry 198 ( 13-15 ) 904 - 908 2022年09月

Analysis of Factors Contributing to the Increase in (7)Be Activity Concentrations in the Atmosphere.

Narazaki Y, Sakoda A, Akata N, Itoh H, Momoshima N

International journal of environmental research and public health 19 ( 16 ) 10128 - 10128 2022年08月

Monthly Precipitation Collected at Hirosaki, Japan: Its Tritium Concentration and Chemical and Stable Isotope Compositions

Haruka Kuwata, Naofumi Akata, Kazusa Okada, Masahiro Tanaka, Hirofumi Tazoe, Naoyuki Kurita, Nao Otashiro, Ryoju Negami, Takahito Suzuki, Yuki Tamakuma, Yoshitaka Shiroma, Masahiro Hosoda

Atmosphere 13 ( 5 ) 848 - 848 2022年05月

222Rn and 226Ra Concentrations in Spring Water and Their Dose Assessment Due to Ingestion Intake

Ryohei Yamada, Masahiro Hosoda, Tomomi Tabe, Yuki Tamakuma, Takahito Suzuki, Kevin Kelleher, Takakiyo Tsujiguchi, Yoshiki Tateyama, Eka Djatnika Nugraha, Anna Okano, Yuki Narumi, Chutima Kranrod, Hirofumi Tazoe, Kazuki Iwaoka, Yumi Yasuoka, Naofumi Akata, Tetsuya Sanada, Shinji Tokonami

International Journal of Environmental Research and Public Health 19 ( 3 ) 1758 - 1758 2022年02月

High Indoor Radon Concentration Observed in Yomitan-son,Okinawa Prefecture, Southwestern Part of Japan

Masahide Furukawa, Yasutaka Omori, Nagi Masuda, Yuki Tamakuma, Takahito Suzuki, Mika Obata, Reina Shingaki, Syunya Nakasone, Akinobu Ishimine, Kaori Nakamura, Yoshitaka Shiroma, Masahiro Hosoda, Naofumi Akata, Shinji Tokonami

Radiation Enviroment and Medicine 11 ( 1 ) 16 - 20 2022年02月

Rapid Chemical Separation Protocol for Optimized 90Sr Determination by ICP-MS in Water Samples for Radiological Incident

Hirofumi Tazoe, Yuto Tomisaka, Naofumi Akata, Ben Russell, Peter Ivanov, Masahiro Hosoda, Shinji Tokonami

Radiation Enviroment and Medicine 11 ( 1 ) 7 - 15 2022年02月

Heavy Metal Assessments of Soil Samples from a High Natural Background Radiation Area, Indonesia.

Nugraha ED, Mellawati J, Wahyudi, Kranrod C, Makhsun, Tazoe H, Ahmad H, Hosoda M, Akata N, Tokonami S

Toxics 10 ( 1 ) 39 - 39 2022年01月

Characterization of atmospheric tritiated water concentration in the vicinity of the fukushima daiichi nuclear power plant

Shigekazu Hirao, Hideki Kakiuchi, Naofumi Akata, Toshiya Tamari, Shinji Sugihara, Nagayoshi Shima, Sumi Yokoyama, Masahiro Tanaka

Journal of Radioanalytical and Nuclear Chemistry 2022年

沖縄島における降水中のトリチウム濃度と水素・酸素安定同位体比及び主要イオン濃度との関係

仲宗根峻也, 中村夏織, 石津裕二, 城間吉貴, 田中将裕, 赤田尚史, 伊志嶺聡伸, 石川義朗, 柿内秀樹, 真田哲也, 古川雅英

保健物理学会誌 56 ( 4 ) 265 - 279 2021年12月

A Preliminary Study of Radon Equilibrium Factor at a Tourist Cave in Okinawa, Japan

Ryohei Yamada, Yuki Tamakuma, Takahito Suzuki, Shunya Nakasone, Yoshitaka Shiroma, Masahide Furukawa, Hiroki Hashimoto, Masahiro Hosoda, Naofumi Akata, Shinji Tokonami

Atmosphere 12 ( 12 ) 1648 - 1648 2021年12月

Comprehensive exposure assessments from the viewpoint of health in a unique high natural background radiation area, Mamuju, Indonesia

Eka Djatnika Nugraha, Masahiro Hosoda, Kusdiana, Untara, June Mellawati, Nurokhim, Yuki Tamakuma, Abarrul Ikram, Mukh Syaifudin, Ryohei Yamada, Naofumi Akata, Michiya Sasaki, Masahide Furukawa, Shinji Yoshinaga, Masaru Yamaguchi, Tomisato Miura, Ikuo Kashiwakura, Shinji Tokonami

Scientific Reports 11 ( 1 ) 2021年12月

Reassessment of the radiocesium resuspension flux from contaminated ground surfaces in East Japan

Mizuo Kajino, Akira Watanabe, Masahide Ishizuka, Kazuyuki Kita, Yuji Zaizen, Takeshi Kinase, Rikuya Hirai, Kakeru Konnai, Akane Saya, Kazuki Iwaoka, Yoshitaka Shiroma, Hidenao Hasegawa, Naofumi Akata, Masahiro Hosoda, Shinji Tokonami, Yasuhito Igarashi

Atmospheric Chemistry and Physics 22 783 - 803 2021年09月

A unique high natural background radiation area in Indonesia: a brief review from the viewpoint of dose assessments

Eka Djatnika Nugraha, Masahiro Hosoda, Yuki Tamakuma, Chutima Kranrod, June Mellawati, Naofumi Akata, Shinji Tokonami

Journal of Radioanalytical and Nuclear Chemistry 2021年07月

Isotope and chemical composition of monthly precipitation collected at Sapporo, northern part of Japan during 2015-2019

Naofumi Akata, Hideki Kakiuchi, Masahiro Tanaka, Yoshio Ishikawa, Naoyuki Kurita, Masahide Furukawa, Miklós Hegedűs, Tibor Kovács, Maksym Gusyev, Tetsuya Sanada

Fusion Engineering and Design 168 2021年07月

Support activities in Namie Town, Fukushima undertaken by Hirosaki University.

Tokonami S, Miura T, Akata N, Tazoe H, Hosoda M, Chutima K, Kudo H, Ogura K, Fujishima Y, Tamakuma Y, Shimizu M, Kikuchi K, Kashiwakura I

Annals of the ICRP 50 ( 1_suppl ) 014664532110068 - 014664532110068 2021年06月

核融合科学研究所における松葉及び土壌中の環境放射性物質のモニタリング

中田実希, 田中将裕, 赤田尚史, 加藤明己, 岩田智恵, 林浩

保健物理学会誌 56 ( 2 ) 66 - 74 2021年06月

核融合科学研究所における松葉及び土壌中の環境放射性物質のモニタリング

中田実希, 田中将裕, 赤田尚史, 加藤明己, 岩田智恵, 林浩

日本保健物理学会誌 56 ( 2 ) 66 - 74 2021年06月

210Pb and Major Ion Concentrations in Aerosols Collected in Qingdao, a Seaside Area of China

O B Modibo, S Tokonami, M Hosoda, Y Tamakuma, H Jun, M Hegedűs, E D Nugraha, Saïdou, H Tazoe, N Akata1, Y Kanai, F Yanagisawa, R Zhang

Radiation Environment and Medicine 10 ( 1 ) 18 - 25 2021年02月

Long-term measurements of radon and thron exhalation rates from the ground using the vertical distributions of their acitivity concentrations

Modibo, O.B.; Tamakuma, Y.; Suzuki, T.; Yamada, R.; Zhuo,W.; Kranrod, C.; Iwaoka, K.; Akata, N.; Hosoda, M.; Tokonami, S.

Int. J. Environ. Res. Public Health 18 ( 1849 ) 2021年02月

Long-Term Measurements of Radon and Thoron Exhalation Rates from the Ground Using the Vertical Distributions of Their Activity Concentrations.

Modibo OB, Tamakuma Y, Suzuki T, Yamada R, Zhuo W, Kranrod C, Iwaoka K, Akata N, Hosoda M, Tokonami S

International journal of environmental research and public health 18 ( 4 ) 1489 - 1489 2021年02月

Simple Pretreatment Method for Tritium Measurement inEnvironmental Water Samples using a Liquid Scintillation Counter

S NAKASONE, S YOKOYAMA, T TAKAHASHI, M OTA, H KAKIUCHI, S SUGIHARA, S HIRAO, N MOMOSHIMA, T TAMARI, N SHIMA, M ATARASHI-ANDOH, S FUKUTANI, K NAKAMURA, A ISHIMINE, M FURUKAWA, M TANAKA, N AKATA

Plasma and Fusion Research 16 2405035-1 - 2405035-5 2021年02月

Simple Pretreatment Method for Tritium Measurement inEnvironmental Water Samples using a Liquid Scintillation Counter

S NAKASONE, S YOKOYAMA, T TAKAHASHI, M OTA, H KAKIUCHI, S SUGIHARA, S HIRAO, N MOMOSHIMA, T TAMARI, N SHIMA, M ATARASHI-ANDOH, S FUKUTANI, K NAKAMURA, A ISHIMINE, M FURUKAWA, M TANAKA, N AKATA

Plasma and Fusion Research: 16 ( 0 ) 2405035-1 - 2405035-5 2021年02月

Temporal and Spatial Variation of Radon Concentrations in Environmental Water from Okinawa Island, Southwestern Part of Japan

Shunya Nakasone, Akinobu Ishimine, Shuhei Shiroma, Natsumi Masuda, Kaori Nakamura, Yoshitaka Shiroma, Sohei Ooka, Masahiro Tanaka, Akemi Kato, Masahiro Hosoda, Naofumi Akata, Yumi Yasuoka, Masahide Furukawa

Int. J. Environ. Res. Public Health 18 998 2021年01月

Discriminative Measurement of Absorbed Dose Rates in Air from Natural and Artificial Radionuclides in Namie Town, Fukushima Prefecture

Koya Ogura, Masahiro Hosoda, Yuki Tamakuma, Takahito Suzuki, Ryohei Yamada, Ryoju Negami, Takakiyo Tsujiguchi, Masaru Yamaguchi, Yoshitaka Shiroma, Kazuki Iwaoka, Naofumi Akata, Mayumi Shimizu, Ikuo Kashiwakura, Shinji Tokonami

Int. J. Environ. Res. Public Health 18 978 2021年01月

A unique high natural background radiation area – Dose assessment and perspectives

Masahiro Hosoda, Eka Djatnika Nugraha, Naofumi Akata, Ryohei Yamada, Yuki Tamakuma, Michiya Sasaki, Kevin Kelleher, Shinji Yoshinaga, Takahito Suzuki, Chanis Pornnumpa Rattanapongs, Masahide Furukawa, Masaru Yamaguchi, Kazuki Iwaoka, Tetsuya Sanada, Tomisato Miura, Kusdiana, Dadong Iskandar, Eko Pudjadi, Ikuo Kashiwakura, Shinji Tokonami

Science of The Total Environment 750 142346 - 142346 2021年01月

Characterization of atmospheric 210Pb concentration and its relation to major ion species at Tsukuba, Japan

Naofumi Akata, Chie Iwata, Miki Nakada, Masahiro Tanaka, Hideki Kakiuchi, Tibor Kovács, Fumitaka Yanagisawa, Yutaka Kanai

Journal of Radioanalytical and Nuclear Chemistry 2021年01月

沖縄島における環境水中トリチウム濃度の変動とその分布

仲宗根峻也、伊志嶺聡伸、中村夏織、石津裕二、城間吉貴、田中将裕、赤田尚史、柿内秀樹、真田哲也、古川雅英

Proceedings of the 21st Workshop on Environmental Radioactivity 21 198 - 203 2020年12月

Natural Radioactivity of Laterite and Volcanic Rock Sample for Radioactive

Ilsa Rosianna, Eka Djatnika Nugraha, Heri Syaeful, Sugili Putra, Masahiro Hosoda, Naofumi Akata, Shinji Tokonami

Geosciences 2020年09月

Low-volume Electrolytic Enrichment for Tritium Measurement Using Improved Solid Polymer Electrolyte System at NIFS and Its Application

Naofumi Akata, Chie Iwata, Akemi Kato, Masahiro Tanaka, Hirofumi Tazoe, Nagayoshi Shima, Kimpei Ichiyanagi, Miklós Hegedűs, Gergő Bátor, Tibor Kovács, Hideki Kakiuchi

Radiation Environment and Medicine 9 ( 2 ) 93 - 97 2020年08月

CAESIUM RETENTION CHARACTERISTICS OF KNIFC-PAN RESIN FROM RIVER WATER.

Hegedűs M, Tazoe H, Yang G, Tamakuma Y, Hosoda M, Akata N, Tokonami S

Radiation protection dosimetry 190 ( 3 ) 320 - 323 2020年08月

Dose Assessment of Radium-226 in Drinking Water from Mamuju, a High Background Radiation Area of Indonesia

Eka Djatnika Nugraha, Masahiro Hosoda, Kusdiana, Ilma D Winarni, Ariska Prihantoro, Takahito Suzuki, Yuki Tamakuma, Naofumi Akata, Shinji Tokonami

Radiation Environment and Medicine 9 ( 2 ) 79 - 83 2020年08月

Environmental Monitoring of 134Cs and 137Cs Levels in Namie Town in 2018 and 2019

Miklós Hegedűs, Thamaborn Ploykrathok, Yoshitaka Shiroma, Kazuki Iwaoka, Ryohei Yamada, Takakiyo Tsujiguchi, Masaru Yamaguchi, Takahito Suzuki, Koya Ogura, Yuki Tamakuma, Hirofumi Tazoe, Naofumi Akata, Masahiro Hosoda, Ikuo Kashiwakura, Shinji Tokonami

Radiation Environment and Medicine 9 ( 2 ) 70 - 78 2020年08月

Assessment of Radiation Dose from the Consumption of Bottled Drinking Water in Japan

Aoife Kinahan, Masahiro Hosoda, Kevin Kelleher, Takakiyo Tsujiguchi, Naofumi Akata, Shinji Tokonami, Lorraine Currivan, Luis León Vintró

International Journal of Environmental Research and Public Health 17 ( 14 ) 4992 - 4992 2020年07月

Preliminary investigation of pretreatment methods for liquid scintilation measurements of environmental water samples using ion exchange resins

Nakasone, S., Yokoyama, S., Takahashi, T., Ota, M., Kakiuchi, H., Sugihara, S., Hirao, S., Momoshima, N., Tamari, T., Shima, N., Atarashi-Andoh, M., Fukutani, S., Ishimine, A., Furukawa, M., Tanaka, M., Akata, N.

Plasma and Fusion Research 15 2020年05月

Monitoring and Recovery of Tritium in Fusion Test Facility

Masahiro Tanaka,Naoyuki Suzuki,Hiromi Kato,Chie Iwata,Naofumi Akata,Hiroshi Hayashi,Hitoshi Miyake

FUSION SCIENCE AND TECHNOLOGY 76 475 - 480 2020年05月

External radiation exposure to the public using car-borne survey method in the uranium and Thorium bearing region of Lolodorf, Cameroon

Guillaume Samuel Bineng, Saïdou, Masahiro Hosoda, Yvette Flore Tchuente Siaka, Naofumi Akata, Simplice Feutseu Talla, Patrice Abiama, Shinji Tokonami

Radiation Environment and Medicine 9 13 - 20 2020年03月

Cesium concentrationsin various environmental media at Namie, Fukusjima

M.Hegedus, Y. Shiroma, K. Iwaoka, M. Hosoda, T. Suzuki, Y. Tamakuma, R. Yamada, T. Tsujiguchi, M. Yamaguchi, K. Ogura, H. Tazoe, N. Akata, I. Kashiwakura, S. Tokonami

Journal of Radioanalytical and Nuclear Chemistry (2019) 323 ( 1 ) 197 - 204 2020年01月

Cesium concentrations in various environmental media at Namie, Fukushima

M. Hegedűs, Y. Shiroma, K. Iwaoka, M. Hosoda, T. Suzuki, Y. Tamakuma, R. Yamada, T. Tsujiguchi, M. Yamaguchi, K. Ogura, H. Tazoe, N. Akata, I. Kashiwakura & S. Tokonami

Journal of Radioanalytical and Nuclear Chemistry 323 197 - 204 2019年11月

岐阜県土岐市における７Beの大気中濃度および降下量の特徴

中田実希，赤田尚史，小林真，加藤明巳，岩田智恵，林浩

Proceedings of the 20th Workshop on Environmental Radioactivity 20 201 - 206 2019年11月

THE IMPACT ON THE EYE LENS OF RADIATION EMITTED BY NATURAL RADIONUCLIDES (LEAD-210) PRESENT IN RADIATION PROTECTION GLASSES

Minoru Osanai, Kohsei Kudo, Masahiro Hosoda, Hirofumi Tazoe, Naofumi Akata, Maiko Kitajima, Megumi Tsushima, Nobuhiro Komiya, Masaya Kudo, Takakiyo Tsujiguchi, Masafumi Takagi, Yoichiro Hosokawa, Yoko Saito

Radiation Protection Dosimetry 185 1 - 9 2019年11月

External Radiation Exosure to the Public Using Car-borne Survey Method in the Uranium a d Thorium Bearing of Lolodorf, Cameroon

Guillaume Samuel Bineng, Saidou, Masahiro Hosoda, Yvette Flore Tchuente Siaka, Naofumi Akata, Simplice Feutseu Talla, Ele Abiama, Shinji Tokonami

Radiation Environment and Medicine 2020, 9 ( 1 ) 13 - 20 2019年11月

ENVIRONMENTAL TRITIUM AROUND A FUSION TEST FACILITY

Masahiro Tanaka, Naofumi Akata, Chie Iwata

Radiation Protection Dosimetry 184 324 - 327 2019年10月

RECENT TRITIUM CONCENTRATION OF MONTHLY PRECIPITATION IN JAPAN

S Nakasone, A Ishimine, Y Ishizu, Y Shiroma, M Tanaka, N Akata, H Kakiuchi, T Sanada, M Furukawa

Radiation Protection Dosimetry 184 334 - 337 2019年10月

TRITIUM, HYDROGEN AND OXYGEN ISOTOPE COMPOSITIONS IN MONTHLY PRECIPITATION SAMPLES COLLECTED AT TOKI, JAPAN

N Akata, H Hasegawa, S Sugihara, M Tanaka, M Furukawa, N kurita, T Kcvacs, Y shiroma, H kakiuchi

Radiation Protection Dosimetry 184 338 - 341 2019年10月

A SIMULATION STUDY OF DEPOSITION PARAMETERS FOR 129I DISCHARGED FROM THE ROKKASHO REPROCESSING PLANT

Koichi Abe, Hidenao Hasegawa, Naofumi Akata, Hideki Kakiuchi, Jing-Hsien Chiang, Hiroji Suwa, Shun'ichi Hisamatsu

Radiation Protection Dosimetry 184 376 - 379 2019年10月

NATURAL RADIATION EXPOSURE TO THE PUBLIC IN MINING AND ORE BEARING REGIONS OF CAMEROON

Saïdou, Shinji Tokonami, Masahiro Hosoda, Ndjana Nkoulou, II Joseph Emmanuel, Naofumi Akata, Tchuente Siaka, Yvette Flore, Oumar Bobbo Modibo, Bineng Guillaume Samuel, Takoukam Soh, Serge Didier

Radiation Protection Dosimetry 184 391 - 396 2019年10月

EVALUATIONS OF INVENTORY AND ACTIVITY CONCENTRATION OF RADIOCESIUM IN SOIL AT A RESIDENTIAL HOUSE 3 YEARS AFTER THE FUKUSHIMA NUCLEAR ACCIDENT

M Hosoda, W Hozumi, N Akata, A Endo, K Kelleher, K Yamanouchi, Y Imajo, T Fukuhara, Y Shiroma, K Iwaoka, S Tokonami

Radiation Protection Dosimetry 184 518 - 522 2019年10月

CHANGES OF ABSORBED DOSE RATE IN AIR BY CAR-BORNE SURVEY IN NAMIE TOWN, FUKUSHIMA PREFECTURE AFTER THE FUKUSHIMA DAIICHI NUCLEAR POWER PLANT ACCIDENT

Y Shiroma, M Hosoda, K Iwaoka, M Hegedűs, H Kudo, T Tsujiguchi, M Yamaguchi, N Akata, I Kashiwakura, S Tokonami

Radiation Protection Dosimetry 184 527 - 530 2019年10月

Isotope composition and chemical species of monthly precipitation collected at the site of a fusion test facility in Japan

Akata, N, Tanaka, M, Iwata, C, Kato, A, Nakada, M, Kovacs, T, Kakiuchi, H

International Journal of Environmental Research and Public Health 16 1 - 11 2019年10月

Measurement of absorbed dose rate in air at the first deuterium plasma experiment in LHD

Shiroma, Y. Hirao, S, Akata, N, Furukawa, M, Miyake, H, Saze, T, Tanaka, M

Plasma and Fusion Research 14 1305130 2019年07月

Radiation control in LHD and radiation shielding capability of the torus hall during first campaign of deuterium experiment

Makoto Kobayashi, Takuya Saze, Hitoshi Miyake, Kunihiro Ogawa, Mitsutaka Isobe, Masahiro Tanaka, Naofumi Akata, Kiyohiko Nishimura, Hiroshi Hayashi, Takashi Kobuchi, Mitsuhiro Yokota, Masaki Osuna, Hideya Nakanishi, Masaki Osakabe, Yasuhiko Takeiri

Fusion Engineering and Design 143 180 - 187 2019年06月

Development of field estimation technique and improvement of environmental tritium behavior model

Sumi Yokoyama, Tomoyuki Takahashi, Masakazu Ota, Hideki Kakiuchi, Shinji Sugihara, Sigekazu Hirao, Noriyuki Momoshima, Toshiya Tamari, Nagayoshi Shima, Mariko Atarashi-Andoh, Satoshi Fukutani, Syunya Nakasone, Masahide Furukawa, Masahiro Tanaka, Naofumi Akata

Plasma and Fusion Research 14 2019年06月

Determination of non‑exchangeable organically bound tritium concentration in reference material of pine needles (NIST 1575a)

AKATA Naofumi, KAKIUCHI Hideki, SHIMA Nagayoshi, TAMARI Toshiya, Kovacs Tibor

Journal of Radioanalytical and Nuclear Chemistry 319 ( 3 ) 1359 - 1363 2019年03月

Concentrations of iodine-129 in livestock, agricultural, and fishery products around spent nuclear fuel reprocessing plant in Rokkasho, Japan, during and after its test operation

Yuhi Sato, Hideki Kakiuchi, Shinji Ueda, Naofumi Akata, Shun'ichi Hisamatsu

Environmental Monitoring and Assessment 191 2019年02月

Determination of Non-Exchangeable Organically Bound Tritium concentration in reference material of pine needles (NIST 1575a)

Naofumi Akata, Hideki Kakiuchi, Nagayoshi Shima, Toshiya Tamari, Tibor Kovacs

Journal of Radioanalytical and Nuclear Chemistry 319 ( 3 ) 1359 - 1363 2019年01月

Evaluating anthropogenic and environmental tritium effects using precipitation and Hokkaido snowpack at selected coastal location in Asia

Gusyev, M.A., Morgenstern, U., Nishihara, T., Hayashi, T., Akata, N., Ichiyanagi, K., Sugimoto, A., Hasegawa, A., Stewart, M.K.

Science of the Total environment 659 1307 - 1321 2019年01月

Natural radiation exposure to the public in the uranium bearing region of Poli, Cameroon: From radioactivity measurements to external and inhalation dose assessment

Saïdou, Tokonami, S., Hosoda, M., Flore, T., Joseph, N., Akata, N., Bobbo, O., Joseph, P.

Journal of Geochemical Exploration 205 16350 2019年01月

Comparative study on performance using five different gamma-ray spectrometers for thyroid monitoring under nuclear emergency situations

Hosoda, M, Iwaoka, K, Tokonami, S, Tamakuma, Y, Shiroma, Y, Fukuhara, T, Imajyo, Y, Taniguchi, J, Akata, N, Osanai, M, Tsujiguchi, T, Yamaguchi, M, Kashiwakura, I

Health Physics 116 81 - 87 2019年01月

蔵王の樹氷（アイスモンスター）(2) -人工衛星画像を用いた越境大気汚染物質解析-

保原雄大, 赤田尚史, 柳澤文孝

雪氷研究大会講演要旨集 2019 ( 0 ) 229 2019年

蔵王の樹氷(アイスモンスター)(3) -ベリリウム7を用いた成層圏からの影響解析-

朝廣裕也, 佐藤克輝, 赤田尚史, 柳澤文孝

雪氷研究大会講演要旨集 2019 ( 0 ) 230 2019年

Expiratory testing as a simple and effective bioassay method for screening workers for tritium exposure in fusion test facilities

N. Akata, C. Iwata, H. Miyake, M. Tanaka

Plasma and Fusion Research 13 1305076 2018年06月

Development of rapid sampling system of atmospheric water vapor for tritium measurement

Akata, N, Kakiuchi, H, Tanaka, M, Shima, N, Shiroma, Y, Tokonami, S, Hosoda, M, Ishikawa, Y, Furukawa, M, Sanada, T

Plasma and Fusion Research 13 3405064 2018年06月

沖縄島における陸水中トリチウム濃度

仲宗根峻也，石津裕二，池本憲弘，城間吉貴，赤田尚史，田中将裕，古川雅英

保健物理 53 65 - 71 2018年06月

Air absorbed dose rate measurements and external dose assessment by car-norne survey in the gold mining areas of Betare-Oya, Eastern Cameroon, Jpn

Engola, L.N, Ndjana Nkoulou II, J. E, Hosoda, M, Bongue, D, Saidou, Akata, N, Heya, R. K, Kwato Njock, M. G, Tokonami, S

Health Phys 53 5 - 11 2018年06月

Concentrations of chemical components, including 210Pb, present in aerosols collected at Naha, Okinawa Prefecture, a sub-tropical region of Japan

Akata, N., Shiroma, Y., Furukawa, M., Kato, A., Kakiuchi, H., Hosoda, M., Kanai, Y., Yanagisawa, F.

Japanese Journal of Health Physics 53 17 - 22 2018年03月

Atmospheric concentration and deposition flux of cosmogenic beryllium-7 at Toki, located at the central part of Japan

Akata, N., Shiroma, Y., Ikemoto, N., Kato, A., Hegedus, M., Tanaka, M., Kakiuchi, H., Kovacs, T.

Radiation Environment and Medicine 7 47 - 52 2018年03月

Air absorbed dose rate measurements and external dose assessment by car-norne survey in the gold mining areas of Betare-Oya, Eastern Cameroon

Engola, L.N., Ndjana Nkoulou II, J. E., Hosoda, M., Bongue, D., Saidou, Akata, N., Heya, R. K., Kwato Njock, M. G., Tokonami, S.

Jpn. J. Health Phys. 53 5 - 11 2018年03月

Air Absorbed Dose Rate Measurements and External Dose Assessment

Louis Ngoa Engola, Joseph Emmanuel Ndjana, Nkoulou II, Masahiro Hosoda, Daniel Bongue, Saidou, Naofumi Akata, Rosalie Koukong Heya, Mo?se Godfroy, Kwato Njock, Shinji Tokonami

Japanese Journal of Health Physics 53 ( 1 ) 200 - 209 2018年01月

Determination of tritium activity and chemical forms in the exhaust gas from a large fusion test device

Tanaka, M., Kato, H., Suzuki, N., Iwata, C., Akata, N.

Journal of Radioanalytical and Nuclear Chemistry 318 877 - 885 2018年

Integrated radiation monitoring and interlock system for the LHD deuterium experiments

Nakanishi, H., Yokota, M., Aoyagi, M., Ohsuna, M., Ito, T., Imazu, S., Nonomura, M., Ogawa, K., Isobe, M., Akata, N., Tanaka, M., Saze, T., Nishimura, K., Hayashi, H., Miyake, H., Ogawa, H., Maeno, H., Emoto, M., Yoshida, M., Kawamura, T., Sakakibara, S, Ishiguro, S., Osakabe, M.

Fusion Engineering and Design 129 259 - 262 2018年

Monitoring of tritium concentration by simplified active sampler in a fusion test facility

Tanaka, M., Yamamoto, Y., Iwata, C., Akata, N.

Plasma and Fusion Research 13 2018年

Impacts of anthropogenic source from the nuclear fuel reprocessing plants on global atmospheric iodine-129 cycle: a model analysis

Kadowaki, M., Katata, G., Terada, H., Suzuki, T., Hasegawa, H., Akata, N., Kakiuchi, H.

Atmospheric Environment 184 278 - 291 2018年

Consideration on the Necessity of Tritium Limit in Foods in Japan - Perspective on the Current Food Regulation

Iwaoka Kazuki, Akata Naofumi, Hosoda Masahiro, Tokonami Shinji

PLASMA AND FUSION RESEARCH 12 2017年07月

A survey of a high natural radiation spot in Tono area, Japan

Akata, N., Ikeda, T., Minato, S., Shiroma, Y., Shimo, M.

Radiation Environment Medicine 6 34 - 38 2017年02月

Weak size dependence of resuspended radiocesium adsorbed on soil particles collected after the Fukushima nuclear accident

Kaneyasu, N., Ohashi, H., Suzuki, F., Okuda, T., Ikemori, F., Akata, N., Kogure, T.

Journal of Environmental Radioactivity 172 65 - 73 2017年

Absorbed dose rate in air at the NIFS Site before the deuterium plasma experiment in LHD

Shiroma, Y., Akata, N., Miyake, H., Hayashi, H., Saze, T., Tanaka, M., Nishimura, K.

Plasma and Fusion Research 12 2017年

Regional and global contributions of anthropogenic iodine-129 in monthly deposition samples collected in North East Japan between 2006 and 2015

Hasegawa, H., Ohtsuka, Y., Kakiuchi, H., Akata, N., Hisamatsu, S.

Journal of Environmental Radioactivity 2017年

Measurement system for alpha and beta emitters with continuous air sampling under different exposure situations

Yamada, R., Tamakuma, Y., Iwaoka, K., Hosoda, M., Shiroma, Y., Akata, N., Mizuno, H., Yamada, K., Kuroki, T., Tokonami, S.

Applied Radiation and Isotopes 126 79 - 82 2017年

2016年の日本大学郡山キャンパス内における放射性セシウムの蓄積量

加藤愛佳, 加藤一美, 齋藤祐峻, 大竹修平, 佐藤寛朗, 田村美樹, 渡邊瑞左, 渡部夏菜, 奥山克彦, 赤田尚史

放地研特別寄稿シリーズ，放射線地学研究所，SCS-120 1 - 4 2017年

Temporal variation of post-accident atmospheric Cs-137 in an evacuated area of Fukushima Prefecture: Size-dependent behaviors of Cs-137-bearing particles

Shinya Ochiai, Hidenao Hasegawa, Hideki Kakiuchi, Naofumi Akata, Shinji Ueda, Shinji Tokonami, Shun'ichi Hisamatsu

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 165 131 - 139 2016年12月

A simple method for sampling and analysis of particulate, inorganic gaseous and organic gaseous halogens in the atmosphere

Akata, N, Tsukada, H, Takahashi, T, Fukutani, S

Radiation Environment Medicine 5 ( 2 ) 29 - 32 2016年08月

Investigation of absorbed dose rate in air by car-borne survey in Namie Town, Fukushima Prefecture

Pornnumpa, C, Iwaoka, K, Akata, N, Hosoda, M, Sorimachi, A, Tokonami, S

Health Phys 51 115 - 121 2016年08月

Spatial and temporal changes of Cs-137 concentrations derived from nuclear power plant accident in river waters in eastern Fukushima, Japan during 2012-2014

Shinya Ochiai, Shinji Ueda, Hidenao Hasegawa, Hideki Kakiuchi, Naofumi Akata, Yoshihito Ohtsuka, Shun'ichi Hisamatsu

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 307 ( 3 ) 2167 - 2172 2016年03月

Long-Term Monitoring of Tritium Concentration in Environmental Water Samples Collected at Tono Area, Japan

Akata Naofumi, Tanaka Masahiro, Kato Hiromi, Yamanishi Hirokuni, Kakiuchi Hideki, Hayashi Hiroshi, Miyake Hitoshi, Nishimura Kiyohiko

PLASMA AND FUSION RESEARCH 11 13050302 2016年03月

A new pretreatment technique for environmental tritium analysis with microwave heating method

Naofumi Akata, Masahiro Tanaka, Sadatsugu Takayama, Hideki Kakiuchi, Toshiya Tamari, Saburo Sano

Plasma and Fusion Research 11 ( 1 ) 2016年

アフリカ・カメルーンにおける自然放射線被ばく調査

赤田尚史, 細田正洋, 床次眞司

保健物理 51 ( 4 ) 204a - 204a 2016年

TRITIUM ACTIVITY CONCENTRATIONS AND RESIDENCE TIMES OF GROUNDWATER COLLECTED IN ROKKASHO, JAPAN

Hidenao Hasegawa, Shinji Ueda, Naofumi Akata, Hideki Kakiuchi, Shun'ichi Hisamatsu

RADIATION PROTECTION DOSIMETRY 167 ( 1-3 ) 201 - 205 2015年11月

TERRESTRIAL GAMMA RADIATION DOSE RATE IN RYUKYU ISLANDS, SUBTROPICAL REGION OF JAPAN

M. Furukawa, S. Kina, M. Shiroma, Y. Shiroma, N. Masuda, D. Motomura, H. Hiraoka, S. Fujioka, T. Kawakami, Y. Yasuda, K. Arakawa, K. Fukahori, M. Jyunicho, S. Ishikawa, T. Ohomoto, R. Shingaki, N. Akata, W. Zhuo, S. Tokonami

RADIATION PROTECTION DOSIMETRY 167 ( 1-3 ) 223 - 227 2015年11月

FWT AND OBT CONCENTRATIONS IN PINE NEEDLE SAMPLES COLLECTED AT TOKI, JAPAN (1998-2012)

N. Akata, H. Kakiuchi, T. Tamari, M. Tanaka, T. Kawano, H. Miyake, T. Uda, K. Nishimura

RADIATION PROTECTION DOSIMETRY 167 ( 1-3 ) 210 - 214 2015年11月

COMPARATIVE DOSIMETRY FOR RADON AND THORON IN HIGH BACKGROUND RADIATION AREAS IN CHINA

H. Kudo, S. Tokonami, Y. Omori, T. Ishikawa, K. Iwaoka, S. K. Sahoo, N. Akata, M. Hosoda, P. Wanabongse, C. Pornnumpa, Q. Sun, X. Li, S. Akiba

RADIATION PROTECTION DOSIMETRY 167 ( 1-3 ) 155 - 159 2015年11月

A pilot study for dose evaluation in high-level natural radiation areas of Yangjiang, China

Yasutaka Omori, Shinji Tokonami, Tetsuo Ishikawa, Sarata Kumar Sahoo, Naofumi Akata, Atsuyuki Sorimachi, Masahiro Hosoda, Chanis Pornnumpa, Paitoon Wanabongse, Hiromi Kudo, Ye-Jing Hu, Yong-Xiang Ao, Xiao-Liang Li, Kun Li, Ying-Hua Fu, Quan-Fu Sun, Suminori Akiba

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 306 ( 1 ) 317 - 323 2015年10月

Dual temperature dual pressure water-hydrogen chemical exchange for water detritiation

Takahiko Sugiyama, Akito Takada, Youhei Morita, Kenji Kotoh, Kenzo Munakata, Akira Taguchi, Takao Kawano, Masahiro Tanaka, Naofumi Akata

FUSION ENGINEERING AND DESIGN 98-99 1876 - 1879 2015年10月

Nuclear accident-derived H-3 in river water of Fukushima Prefecture during 2011-2014

Shinji Ueda, Hidenao Hasegawa, Hideki Kakiuchi, Shinya Ochiai, Naofumi Akata, Shun'ichi Hisamatsu

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 146 102 - 109 2015年08月

Effects of radiocesium inventory on Cs-137 concentrations in river waters of Fukushima, Japan, under base-flow conditions

Shinya Ochiai, Shinji Ueda, Hidenao Hasegawa, Hideki Kakiuchi, Naofumi Akata, Yoshihito Ohtsuka, Shun'ichi Hisamatsu

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 144 86 - 95 2015年06月

Estimation of External Dose by Car-Borne Survey in Kerala, India

Masahiro Hosoda, Shinji Tokonami, Yasutaka Omori, Sarata Kumar Sahoo, Suminori Akiba, Atsuyuki Sorimachi, Tetsuo Ishikawa, Raghu Ram Nair, Padmavathy Amma Jayalekshmi, Paul Sebastian, Kazuki Iwaoka, Naofumi Akata, Hiromi Kudo

PLOS ONE 10 ( 4 ) e0124433 2015年04月

Iodine-129 in water samples collected adjacent to a spent nuclear fuel reprocessing plant in Rokkasho, Japan

Shinji Ueda, Hideki Kakiuchi, Hidenao Hasegawa, Naofumi Akata, Hidehisa Kawamura, Shun'ichi Hisamatsu

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 303 ( 2 ) 1211 - 1215 2015年02月

Radiocesium inventory on the campus of Nihon University, Koriyama, Fukushima, Japan

Akata, N, Okuyama, K, Tsujimoto, Y, Takahashi, N, Ishihara, M, Arai, Y, Itakura, T, Sato, T, Ogata, T, Kakiuchi, H

Radiation Emergency Medicine 4 57 - 61 2015年02月

Atmospheric deposition of radionuclides (Be-7, Pb-210, Cs-134, Cs-137 and K-40) during 2000-2012 at Rokkasho, Japan, and impact of the Fukushima Dai-ichi Nuclear Power Plant accident

Naofumi Akata, Hidenao Hasegawa, Hitoshi Kawabata, Hideki Kakiuchi, Yuki Chikuchi, Nagayoshi Shima, Toshitaka Suzuki, Shun'ichi Hisamatsu

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 303 ( 2 ) 1217 - 1222 2015年02月

岐阜県東濃地域における環境放射線調査

細田正洋, 赤田尚史, 下道國, 古川雅英, 岩岡和輝, 床次眞司

ＲＡＤＩＯＩＳＯＴＯＰＥＳ 64 ( 7 ) 465 - 474 2015年

Characteristics of hydrogen and oxygen stable isotope ratios in precipitation collected in a snowfall region, Aomori Prefecture, Japan

Hidenao Hasegawa, Naofumi Akata, Hitoshi Kawabata, Tadahiro Sato, Yuki Chikuchi, Shun'ichi Hisamatsu

GEOCHEMICAL JOURNAL 48 ( 1 ) 9 - 18 2014年

2012年の積雪観測講習会における積雪断面観測結果とイオン成分濃度および水素・酸素同位体比

赤田尚史, 原田鉱一郎, 本谷研, 根本征樹, 佐藤研吾, 阿部修

東北の雪と生活 ( 28 ) 42 - 45 2013年10月

DAILY RADIONUCLIDE INGESTION AND INTERNAL RADIATION DOSES IN AOMORI PREFECTURE, JAPAN

Yoshihito Ohtsuka, Hideki Kakiuchi, Naofumi Akata, Yuichi Takaku, Shun'ichi Hisamatsu

HEALTH PHYSICS 105 ( 4 ) 340 - 350 2013年10月

Radiocarbon concentrations in environmental samples collected near the spent nuclear fuel reprocessing plant at Rokkasho, Aomori, Japan, during test operation using spent nuclear fuel

Naofumi Akata, Koichi Abe, Hideki Kakiuchi, Takashi Iyogi, Nagayoshi Shima, Shun'ichi Hisamatsu

Health Physics 105 ( 3 ) 236 - 244 2013年09月

Fluvial discharges of radiocaesium from watersheds contaminated by the Fukushima Dai-ichi Nuclear Power Plant accident, Japan

Shinji Ueda, Hidenao Hasegawa, Hideki Kakiuchi, Naofumi Akata, Yoshihito Ohtsuka, Shun'ichi Hisamatsu

Journal of Environmental Radioactivity 118 96 - 104 2013年04月

Activity concentrations of environmental samples collected in Fukushima Prefecture immediately after the Fukushima nuclear accident.

Masahiro Hosoda, Shinji Tokonami, Hirofumi Tazoe, Atsuyuki Sorimachi, Satoru Monzen, Minoru Osanai, Naofumi Akata, Hideki Kakiuchi, Yasutaka Omori, Tetsuo Ishikawa, Sarata K Sahoo, Tibor Kovács, Masatoshi Yamada, Akifumi Nakata, Mitsuaki Yoshida, Hironori Yoshino, Yasushi Mariya, Ikuo Kashiwakura

Scientific reports 3 2283 - 2283 2013年

Concentration of H-3 in plants around Fukushima Dai-ichi Nuclear Power Station

Hideki Kakiuchi, Naofumi Akata, Hidenao Hasegawa, Shinji Ueda, Shinji Tokonami, Masatoshi Yamada, Masahiro Hosoda, Atsuyuki Sorimachi, Hirofumi Tazoe, Kaori Noda, Shun'ichi Hisamatsu

SCIENTIFIC REPORTS 2 947 2012年12月

Combination of Sulfur Isotope Ratio of Non-sea Salt Sulfate and Lead-210 Concentration in Aerosols as an Index of Long-range Transported Aerosols

小谷卓, 柳澤文孝, 金井豊, 宮岡明子, 赤田尚史

Radioisotopes 61 ( 2 ) 65 - 70 2012年02月

Determination of particulate, inorganic and organic gaseous halogens in the atmosphere

H. Tsukada, A. Takeda, H. Kakiuchi, N. Akata

KURRI Progress Report 2011 240 2012年

LOW-LEVEL MEASUREMENT WITH A NOBLE GAS MASS SPECTROMETER FOR ORGANICALLY BOUND TRITIUM IN ENVIRONMENTAL SAMPLES

H. Kakiuchi, H. Hasegawa, N. Akata, T. Tamari, H. Kawamura, N. Baglan, N. Momoshima, T. Uda, S. Hisamatsu

FUSION SCIENCE AND TECHNOLOGY 60 ( 4 ) 1256 - 1259 2011年11月

DETERMINATION OF THE ATMOSPHERIC HTO CONCENTRATION AROUND THE NUCLEAR FUEL REPROCESSING PLANT IN ROKKASHO BY USING A PASSIVE TYPE SAMPLER

Naofumi Akata, Hideki Kakiuchi, Kuniaki Kanno, Nagayoshi Shima, Shun'ichi Hisamatsu

FUSION SCIENCE AND TECHNOLOGY 60 ( 4 ) 1292 - 1295 2011年11月

Tritium concentrations in the atmospheric environment at Rokkasho, Japan before the final testing of the spent nuclear fuel reprocessing plant

Naofumi Akata, Hideki Kakiuchi, Nagayoshi Shima, Takashi Iyogi, Noriyuki Momoshima, Shun'ichi Hisamatsu

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 102 ( 9 ) 837 - 842 2011年09月

東アジア地域の石炭に含まれる硫黄の安定同位体比とその地域分布

本山玲美, 柳澤文孝, 上田晃, 鈴木祐一郎, 金井豊, 大澤英二, 小島武, 赤田尚史

Radioisotopes 60 ( 1 ) 27-33 (J-STAGE) - 33 2011年01月

Ten-year observation of sulfur isotopic composition of sulfate in aerosols collected at Tsuruoka, a coastal area on the Sea of Japan in northern Japan

Naofumi Akata, Fumitaka Yanagisawa, Takashi Kotani, Akira Ueda

GEOCHEMICAL JOURNAL 44 ( 6 ) 571 - 577 2010年

山形県新庄市における降雪の化学組成の特徴および酸性雪の経年変化(1991/92年~2002/03年)

赤田尚史, 柳澤文孝, 奥村信貴, 鈴木伸一朗, 阿部修, 佐藤威, 小杉健二, 望月重人, 佐藤篤司

雪氷 71 ( 4 ) 253 - 262 2009年07月

Air mass origins by back trajectory analysis for evaluating atmospheric (210)Pb concentrations at Rokkasho, Aomori, Japan

N. Akata, H. Kawabata, H. Hasegawa, K. Kondo, T. Sato, Y. Chikuchi, S. Hisamatsu, J. Inaba

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 279 ( 2 ) 493 - 498 2009年02月

Total deposition velocities and scavenging ratios of Be-7 and Pb-210 at Rokkasho, Japan

Naofumi Akata, H. Kawabata, H. Hasegawa, T. Sato, Y. Chikuchi, K. Kondo, S. Hisamatsu, J. Inaba

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 277 ( 2 ) 347 - 355 2008年08月

Plant induced changes in concentrations of caesium, strontium and uranium in soil solution with reference to major ions and dissolved organic matter

Akira Takeda, Hirofumi Tsukada, Yuichl Takaku, Naofumi Akata, Shun'ichi Hisamatsu

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 99 ( 6 ) 900 - 911 2008年06月

山形蔵王の着氷に含まれる化学成分の特徴‐長距離輸送成分の影響評価‐

赤田尚史

雪国環境研究 ( 14 ) 1 - 12 2008年03月

山形蔵王で採取した着氷に含まれる硫酸イオンの硫黄同位体比

赤田尚史, 柳澤文孝, 山下千尋, 座間味一朗, 松木兼一郎, 川端明子, 上田晃

雪氷 70 ( 2 ) 105 - 112 2008年03月

Mechanism of Be-7 scavenging from the atmosphere through precipitation in relation to seasonal variations in Rokkasho Village, Aomori Prefecture, Japan

H. Hasegawa, N. Akata, H. Kawabata, Y. Chikuchi, T. Sato, K. Kondo, J. Inaba

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 273 ( 1 ) 171 - 175 2007年07月

Estimation of natural radionuclide deposition flux by a simple simulation model at Rokkasho Village, Japan

Hasegawa, H, Akata, N, Kawabata, H, Chikuchi, Y, Sato, T, Kondo, K, Hisamatsu, S, Inaba, J

International Symposium on Environmental Modeling and Radioecology, Rokkasho, Japan, October. 255 - 258 2007年

Deposition of (CS)-C-137 in Rokkasho, Japan and its relation to Asian dust

Naofumi Akata, Hidenao Hasegawa, Hitoshi Kawabata, Yuki Chikuchi, Tadahiro Sato, Yoshihito Ohtsuka, Kunio Kondo, Shun'ichi Hisamatsu

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 95 ( 1 ) 1 - 9 2007年

Atmospheric concentrations and deposition fluxes of 7Be and 210Pb at Rokkasho Village, Japan

Akata, N, Kawabata, H, Hasegawa, H, Sato, T, Chikuchi, Y, Kondo, K, Hisamatsu, S, Inaba, J

International Symposium on Environmental Modeling and Radioecology, Rokkasho, Japan, October. 263 - 266 2007年

大東諸島の自然放射能レベルとその地質学的解釈

古川雅英, 赤田尚史, 床次眞司

Radioisotopes 54 213 - 224 2005年07月

Preliminary study of below-cloud deposition rates of the major ionic species using atmospheric depositions collected along the altitudinal gradient on Mt. Emei, Sichuan, China

Akata, N, Yanagisawa, F, Jia, S.Y, Li, X.D, Kawawbata, H

Proceedings of the Fourth ADEC Workshop 257 - 260 2005年04月

自然放射能からみた東アジアにおけるレスと風成塵起源土壌の特徴

古川雅英, 赤田尚史, 卓維海, 郭秋菊, 楢崎幸範, 床次眞司

エアロゾル研究 20 306 - 312 2005年

Eolian dust may be an effective expander of HBRA: a case of China–Ryukyu connection

Furukawa, M, Zhuo, W, Tokonami, S, Akata, N, Guo, Q

International Congress Series 1276 307 - 308 2005年

Effect of salinity on biological concentrations of Cs-137 in phytoplankton inhabited in brackish Lake Obuchi, Japan, bordered by nuclear fuel facilities

K Kondo, S Ueda, Y Chikuchi, H Kawabata, N Akata, H Hasegawa, O Mitamura, Y Seike, J Inaba

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 261 ( 3 ) 559 - 567 2004年

Distribution and dynamics of radionuclides and stable elements in the coastal waters off Rokkasho Village, Japan, prior to the opening of a nuclear reprocessing facility: Part III. Concentration levels of radionuclides in seawater off Rokkasho Village

K. Kondo, H. Kawabata, S. Ueda, N. Akata, O. Mitamura, Y. Seike, J. Inaba, Y. Ohmomo

Journal of Radioanalytical and Nuclear Chemistry 258 ( 3 ) 463 - 472 2003年12月

Seasonal variation and altitude distribution of bulk deposition chemistry at Mt. Emei, Sichuan Province, China

N Akata, F Yanagisawa, S Jia, Li, X, H Yang, H Masuda

GEOCHIMICA ET COSMOCHIMICA ACTA 67 ( 18 ) A11 - A11 2003年09月

Distribution and dynamics of radionuclides and stable elements in the coastal waters off Rokkasho Village, Japan, prior to the opening of a nuclear reprocessing facility

K Kondo, H Kawabata, S Ueda, N Akata, J Inaba, O Mitamura, Y Seike, Y Ohmomo

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 258 ( 1 ) 33 - 41 2003年09月

Scavenging mechanism of radionuclide 7Be from the atmosphere through precipitation in Rokkasho Village, Aomori Prefecture, Japan

Hasegawa, H, Akata, N, Kawabata, H, Chikuchi, Y, Sato, T, Kondo, K, Inaba, J

Proceedings of the International Symposium on Radioecology and Environmental Dosimetry, Rokkasho, Japan 421 - 426 2003年

Distribution and decomposition of suspended particles, which function in the elimination of radionuclides and stable elements from seawater in the coastal waters off Rokkasho Village, Japan

Kondo, K, Kawabata, H, Ueda, S, Hasegawa, H, Akata, N, Inaba, J, Ohmomo, Y

Proceedings of the International Symposium on Radioecology and Environmental Dosimetry, Rokkasho, Japan 377 - 383 2003年

A first experiment on the scavenging of materials by rainfall using a large artificial climate experiment chamber at ACEF in IES

Kawabata, H, Hasegawa, H, Akata, N, Chikuchi, Y, JPA ACEFF Group, Kondo, K, Inaba, J

Proceedings of the International Symposium on Radioecology and Environmental Dosimetry, Rokkasho, Japan 450 - 455 2003年

A study on the washout coefficient of tritiated water vapor in the atmosphere

Iida, T, Saito, K, Kawabata, H, Hasegawa, H, Akata, N

Proceedings of the First Asian and Oceanic Congress for Radiation Protection (AOCRP-1), ps-6-35 (in CD-ROM) 2002年07月

峨眉山の降雨に含まれる硫酸イオンのイオウ同位体比（序報）

柳澤文孝, 賈疎源, 益田晴恵, 赤田尚史, 本山玲美, 上田晃, 川端明子

Journal of Ecotechnology Research 8 ( 1 ) 37 - 40 2002年04月

東アジアで使用されている石炭に含まれる硫黄の同位体比

本山玲美, 柳沢文孝, 赤田尚史, 鈴木祐一郎, 金井豊, 小島武, 川端明子, 上田晃

雪氷 64 ( 1 ) 49 - 58 2002年01月

2001年1月と3月に東北地方に降った「赤い雪」の特徴

柳沢文孝, 奥村信貴, 本山玲美, 松本寿子, 山下千尋, 赤田尚史, 阿部修

寒地技術論文・報告集 17 310 - 316 2001年11月

Concentration of Metallothionein in Mice Livers after a Small Dose lrradiation

Saito, M, Yanai, T, Hasegawa, H, Akata, N, Kudo-Kanaiwa, S, Matsumoto, T, Noda, Y, Otsu, H, Sato, F

Journal of Radiation Research 7 ( 1 ) 1 - 6 2001年06月

東アジア地域の降雨に含まれる硫酸イオンの硫黄同位体比

柳澤文孝, 赤田尚史, 本山玲美, 賈疎源, 益田晴恵, 楊慧東, 萬新南, 中屋真司, 北田奈緒子, 藤井理行, 小林俊一, 西尾文彦, 高橋晃, 川端明子, 上田晃

Journal of Ecotechnology Research 7 ( 1 ) 7 - 12 2001年01月

Seasonal Variation of Sulfur Isotope Ratio of Non-sea Salt Sulfate in Japan Seasonal Variation of Sulfur Isotope Ratio of Non-sea Salt Sulfate in Japan

Yanagisawa, F, Akata, N, Motoyama, R, Kawabata, A, Ueda, A

Journal of Ecotechnology Research 7 ( 1 ) 7 - 12 2001年01月

Concentration of metallothionein in mice livers after a small dose of irradiation

S Mikio, T Yanai, H Hasegawa, N Akata, S Kanaiwa-Kudo, T Matsumoto, Y Noda, H Otsu, F Sato

JOURNAL OF RADIATION RESEARCH 39 ( 4 ) 239 - 242 1998年12月

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