Papers - AKATA Naofumi
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Measurement and analysis of long-term variation of atmospheric 7Be activity concentrations in Dazaifu (western Japan)
Yukinori Narazaki, Akihiro Sakoda, Naofumi Akata, Hisanori Itoh, Noriyuki Momoshima
Journal of Environmental Radioactivity 284 107612 - 107612 2025.4
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Elevated levels of tritium in surface water collected in the immediate aftermath of the Fukushima accident
Khemruthai Kheamsiri, Donovan Anderson, Hirofumi Tazoe, Kazusa Okada, Nao Otashiro, Haruka Kuwata, Hideki Kakiuchi, Masahiro Hosoda, Tibor Kovács, Shinji Tokonami, Naofumi Akata
Environmental Pollution 126040 - 126040 2025.3
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Fukushima’s Tap and Groundwater a Decade after the Nuclear Accident with Radiocesium, Tritium, and Radon
Donovan Anderson, Yuki Oda, Yasuyuki Taira, Yasutaka Omori, Hirofumi Tazoe, Naofumi Akata, Chutima Kranrod, Ryohei Yamada, Haruka Kuwata, Yuki Tamakuma, Hiromi Kudo, Minoru Osanai, Natsuki Nishimura, Yumi Yasuoka, Tetsuya Sanada, Masahiro Hosoda, Shinji Tokonami
Environmental Science & Technology 2025.3
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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 2025.3
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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 2025.2
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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 2024.11
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Atmospheric concentrations of 7Be and 210Pb in weekly aerosols at Hirosaki, a heavy snowfall area in Japan
Khemruthai Kheamsiri, Oumar Bobbo Modibo, Bagus Sidik Waskito Hadi, Haruka Kuwata, Ryohei Yamada, Chutima Kranrod, Naofumi Akata
Radiation Protection Dosimetry 200 ( 16-18 ) 1782 - 1786 2024.11
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Tritium determination in natural water samples in Fukushima from 2022 to 2023 using an ultra-low-level tritium counting system
Miklós Hegedűs, Haruka Kuwata, Khemruthai Kheamsiri, Maté Novák, Ryohei Yamada, Naofumi Akata, Tibor Kovács
Radiation Protection Dosimetry 200 ( 16-18 ) 1845 - 1849 2024.11
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Tritium concentration in monthly precipitation in Okinawa and Kagoshima, southern Japan
Naofumi Akata, Kaho Ohno, Haruka Kuwata, Khemruthai Kheamsiri, Yukiko Yoshinaka, Ryohei Yamada, Yuisa Kitayama, Sana Aizawa, Shunya Nakasone, Akinobu Ishimine, Masahiro Tanaka, Yoshitaka Shiroma, Shinji Tokonami, Masahide Furukawa
Radiation Protection Dosimetry 200 ( 16-18 ) 1792 - 1796 2024.11
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Study of seasonal variation of accident-derived atmospheric radiocesium in Koriyama City, Fukushima Prefecture, Japan during 2011–2014
Hidenao Hasegawa, Naofumi Akata, Katsuhiko Okuyama, Shinya Ochiai, Hideki Kakiuchi, Shinji Ueda
Radiation Protection Dosimetry 200 ( 16-18 ) 1829 - 1834 2024.11
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Optimization of pretreatment protocol for strontium-90 analysis in marine fish bone samples
Hirofumi Tazoe, Yosuke Amano, Yasuo Ishida, Masatoshi Yamada, Naofumi Akata
Radiation Protection Dosimetry 200 ( 16-18 ) 1861 - 1866 2024.11
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Impacts of the large fusion test facility on tritium in environmental water and natural radiation levels
Masahiro Tanaka, Saori Kurita, Naofumi Akata
Radiation Protection Dosimetry 200 ( 16-18 ) 1802 - 1806 2024.11
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Evaluation of combustion system for organically bound tritium analysis using dried fish samples
Haruka Kuwata, Ryohei Yamada, Khemruthai Kheamsiri, Hideki Kakiuchi, Toshiya Tamari, Nagayoshi Shima, Naofumi Akata
Radiation Protection Dosimetry 200 ( 16-18 ) 1807 - 1812 2024.11
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Development of evaluation method for radiocesium availability in soil by biomimetic approach
Akira Takeda, Yusuke Unno, Mathew J B Swallow, Yasumi Yagasaki, Tetsuo Yasutaka, Naofumi Akata
Radiation Protection Dosimetry 200 ( 16-18 ) 1767 - 1771 2024.11
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Characteristics of tritium, stable isotopes and chemical components in monthly precipitation at Hiroshima, Japan
Ryohei Yamada, Haruka Kuwata, Khemruthai Kheamsiri, Kaho Ohno, Yuisa Kitayama, Yukiko Yoshinaka, Shinji Yoshinaga, Naoyuki Kurita, Naofumi Akata
Radiation Protection Dosimetry 200 ( 16-18 ) 1797 - 1801 2024.11
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Behavior of radioactive cesium concentration for 13 years after FDNPP accident at Koriyama campus of Nihon University, Fukushima, Japan
Ryoko Suzuki, Katsuhiko Okuyama, Kohei Chiba, Taiki Hashimoto, Natsumi Katsumata, Azusa Ukitsu, Khemruthai Kheamsiri, Ryohei Yamada, Naofumi Akata
Radiation Protection Dosimetry 200 ( 16-18 ) 1835 - 1839 2024.11
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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 2024.10
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Variation analysis of atmospheric 7Be activity concentrations with respect to precipitation
Yukinori Narazaki, Akihiro Sakoda, Naofumi Akata, Hisanori Itoh, Noriyuki Momoshima
Journal of Environmental Radioactivity 277 107432 - 107432 2024.7
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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
Naofumi Akata, Donovan Anderson, Hideki Kakiuchi, Ryohei Yamada, Hidenao Hasegawa, Shinji Ueda
Science of The Total Environment 947 174404 - 174404 2024.7
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Environmental Radioactivity during Active Testing at the Rokkasho Reprocessing Plant—Effects on Environment by Released Radionuclides—
Shinji Ueda, Hidenao Hasegawa, Hideki Kakiuchi, Yoshihito Ohtsuka, Koichi Abe, Naofumi Akata, Shinya Ochiai
RADIOISOTOPES 73 ( 1 ) 81 - 99 2024.3
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Temporal variation of tritium concentration in monthly precipitation collected at a Difficult-to-Return Zone in Namie Town, Fukushima Prefecture, Japan
Ryohei Yamada, Hidenao Hasegawa, Naofumi Akata, Hideki Kakiuchi, Shinya Ochiai, Haruka Kuwata, Khemruthai Kheamsiri, Shinji Tokonami, Shinji Ueda
Environmental Science and Pollution Research 31 ( 5 ) 7818 - 7827 2024.1
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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 2024.1
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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
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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 2023.12
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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 2023.11
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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 2023.7
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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 2023.7
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Efforts to Bioassay for Internal Radiation Dose Assessment at Advanced Radiation Emergency Medical Support Center, Hirosaki University
YAMADA Ryohei, OSANAI Osamu, AKATA Naofumi, TAZOE Hirofumi, TSUJIGUCHI Takakiyo, ITO Katsuhiro, HANADA Hiroyuki, TOKONAMI Shinji, KASHIWAKURA Ikuo
Japanese Journal of Health Physics 58 ( 1 ) 27 - 30 2023.4
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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 2023.4
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Response to Naturally Occurring Radioactive Material (NORM) in Japan; A Comprehensive Survey of Exposure from NORM in FY2021
YAMADA Ryohei, TOMISAKA Yuto, IWAOKA Kazuki, AKATA Naofumi
Japanese Journal of Health Physics 57 ( 4 ) 181 - 185 2023.2
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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 2022.12
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LEVELS OF ATMOSPHERIC TRITIUM IN THE SITE OF FUSION TEST FACILITY
Masahiro Tanaka, Chie Iwata, Miki Nakada, Akemi Kato, Naofumi Akata
Radiation Protection Dosimetry 198 ( 13-15 ) 1084 - 1089 2022.9
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TRITIUM CONCENTRATION IN MONTHLY PRECIPITATION NEAR THE FUSION TEST FACILITY IN JAPAN BEFORE AND AFTER THE DEUTERIUM PLASMA EXPERIMENT
Naofumi Akata, Chie Iwata, Miki Nakada, Akemi Kato, Kazusa Okada, Haruka Kuwata, Shunya Nakasone, Masahiro Tanaka
Radiation Protection Dosimetry 198 ( 13-15 ) 976 - 984 2022.9
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TEMPORAL VARIATION OF POST-ACCIDENT 129I IN ATMOSPHERIC PARTICULATE MATTER COLLECTED FROM AN EVACUATED AREA OF FUKUSHIMA PREFECTURE, JAPAN
Hidenao Hasegawa, Hideki Kakiuchi, Shinya Ochiai, Naofumi Akata, Shinji Ueda, Shinji Tokonami
Radiation Protection Dosimetry 198 ( 13-15 ) 1143 - 1149 2022.9
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SPECIATION OF CESIUM ISOTOPES IN RIVER WATER: A CASE STUDY IN THE UKEDO RIVER
Hirofumi Tazoe, Ryo Tachizaki, Yuto Tomisaka, Haruka Kuwata, Naofumi Akata
Radiation Protection Dosimetry 198 ( 13-15 ) 1077 - 1083 2022.9
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PERFORMANCE EVALUATION OF COMMERCIAL SCINTILLATION COCKTAILS FOR LOW-LEVEL TRITIUM COUNTING BY HIGH-CAPACITY LIQUID SCINTILLATION COUNTER
Haruka Kuwata, Hirofumi Tazoe, Chutima Kranrod, Kenso Fujiwara, Motoki Terashima, Makoto Matsueda, Shigekazu Hirao, Naofumi Akata
Radiation Protection Dosimetry 198 ( 13-15 ) 1014 - 1018 2022.9
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INFLUENCE OF SAMPLING FLOW RATE ON THORON EXHALATION RATE MEASUREMENTS BY THE CIRCULATION METHOD
Masahiro Hosoda, Ryohei Yamada, Hiromu Kobyashi, Yuki Tamakuma, Eka Djatnika Nugraha, Hiroki Hashimoto, Ryoju Negami, Chutima Kranrod, Yasutaka Omori, Hirofumi Tazoe, Naofumi Akata, Shinji Tokonami
Radiation Protection Dosimetry 198 ( 13-15 ) 904 - 908 2022.9
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Analysis of Factors Contributing to the Increase in 7Be Activity Concentrations in the Atmosphere
Yukinori Narazaki, Akihiro Sakoda, Naofumi Akata, Hisanori Itoh, Noriyuki Momoshima
International Journal of Environmental Research and Public Health 19 ( 16 ) 10128 - 10128 2022.8
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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 2022.5
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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 2022.2
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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 2022.2
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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 2022.2
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Heavy Metal Assessments of Soil Samples from a High Natural Background Radiation Area, Indonesia
Eka Djatnika Nugraha, June Mellawati, Wahyudi, Chutima Kranrod, Makhsun, Hirofumi Tazoe, Haeranah Ahmad, Masahiro Hosoda, Naofumi Akata, Shinji Tokonami
Toxics 10 ( 1 ) 39 - 39 2022.1
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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
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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 2021.12
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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 2021.12
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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 ) 2021.12
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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 2021.9
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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 2021.7
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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 2021.7
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Support activities in Namie Town, Fukushima undertaken by Hirosaki University
Shinji Tokonami, Tomisato Miura, Naofumi Akata, Hirofumi Tazoe, Masahiro Hosoda, Kranrod Chutima, Hiromi Kudo, Koya Ogura, Yohei Fujishima, Yuki Tamakuma, Mayumi Shimizu, Kazutaka Kikuchi, Ikuo Kashiwakura
Annals of the ICRP 50 ( 1_suppl ) 014664532110068 - 014664532110068 2021.6
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Monitoring of Environmental Radioactivity in Pine Needle and Soil at the Site of National Institute for Fusion Science
NAKADA Miki, TANAKA Masahiro, AKATA Naofumi, KATO Akemi, IWATA Chie, HAYASHI Hiroshi
Japanese Journal of Health Physics 56 ( 2 ) 66 - 74 2021.6
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Monitoring of Environmental Radioactivity in Pine Needle and Soil at the Site of National Institute for Fusion Science
中田実希, 田中将裕, 田中将裕, 赤田尚史, 加藤明己, 岩田智恵, 林浩
保健物理(Web) 56 ( 2 ) 66 - 74 2021.6
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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 2021.2
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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 ) 2021.2
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Long-Term Measurements of Radon and Thoron Exhalation Rates from the Ground Using the Vertical Distributions of Their Activity Concentrations
Oumar Bobbo Modibo, Yuki Tamakuma, Takahito Suzuki, Ryohei Yamada, Weihai Zhuo, Chutima Kranrod, Kazuki Iwaoka, Naofumi Akata, Masahiro Hosoda, Shinji Tokonami
International Journal of Environmental Research and Public Health 18 ( 4 ) 1489 - 1489 2021.2
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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 2021.2
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Simple Pretreatment Method for Tritium Measurement in Environmental Water Samples using a Liquid Scintillation Counter
NAKASONE Shunya, SHIMA Nagayoshi, ATARASHI-ANDOH Mariko, FUKUTANI Satoshi, NAKAMURA Kaori, ISHIMINE Akinobu, FURUKAWA Masahide, TANAKA Masahiro, AKATA Naofumi, YOKOYAMA Sumi, TAKAHASHI Tomoyuki, OTA Masakazu, KAKIUCHI Hideki, SUGIHARA Shinji, HIRAO Shigekazu, MOMOSHIMA Noriyuki, TAMARI Toshiya
Plasma and Fusion Research 16 ( 0 ) 2405035-1 - 2405035-5 2021.2
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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 2021.1
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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 2021.1
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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 2021.1
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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 2021.1
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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 2020.12
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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 2020.9
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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 2020.8
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Caesium Retention Characteristics of Knifc–Pan Resin from River Water
Miklós Hegedűs, Hirofumi Tazoe, Guosheng Yang, Yuki Tamakuma, Masahiro Hosoda, Naofumi Akata, Shinji Tokonami
Radiation Protection Dosimetry 190 ( 3 ) 320 - 323 2020.8
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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 2020.8
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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 2020.8
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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 2020.7
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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 2020.5
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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 2020.5
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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 2020.3
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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 2020.1
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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 2019.11
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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 2019.11
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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 2019.11
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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 2019.11
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ENVIRONMENTAL TRITIUM AROUND A FUSION TEST FACILITY
Masahiro Tanaka, Naofumi Akata, Chie Iwata
Radiation Protection Dosimetry 184 324 - 327 2019.10
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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 2019.10
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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 2019.10
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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 2019.10
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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 2019.10
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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 2019.10
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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 2019.10
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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 2019.10
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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 2019.7
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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 2019.6
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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 2019.6
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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 2019.3
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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 2019.2
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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 2019.1
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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 2019.1
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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 2019.1
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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 2019.1
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Jyuhyo(Ice Monster) in Mt.Zao (2) -Determining Sources of Cross Border Air Pollutants Using Images from Artificial Satellite-
Hobara Yuta, Akata Naofumi, Yanagisawa Fumitaka
Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research 2019 ( 0 ) 229 2019
-
Jyuhyo (Ice Monster) in Mt.Zao (3) - Influence from Stratosphere to Mt.Zao Using Beryllium-7 -
Asahiro Yuya, Sato Katsuki, Akata Naofumi, Yanagisawa Fumitaka
Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research 2019 ( 0 ) 230 2019
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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 2018.6
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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 2018.6
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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 2018.6
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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 2018.6
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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 2018.3
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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 2018.3
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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 2018.3
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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 2018.1
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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
-
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
-
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
-
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
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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 2017.7
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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 2017.2
-
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
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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
-
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
-
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
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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
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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 2016.12
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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 2016.8
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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 2016.8
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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 2016.3
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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 2016.3
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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
-
The Study of Natural Radiation Exposure in Cameroon
AKATA Naofumi, HOSODA Masahiro, TOKONAMI Shinji
Japanese Journal of Health Physics 51 ( 4 ) 204a - 204a 2016
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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 2015.11
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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 2015.11
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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 2015.11
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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 2015.11
-
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 2015.10
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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 2015.10
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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 2015.8
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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 2015.6
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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 2015.4
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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 2015.2
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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 2015.2
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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 2015.2
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Investigation of Environmental Radiation at Tono Area in Gifu Prefecture, Japan
HOSODA Masahiro, AKATA Naofumi, SHIMO Michikuni, FURUKAWA Masahide, IWAOKA Kazuki, TOKONAMI Shinji
RADIOISOTOPES 64 ( 7 ) 465 - 474 2015
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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
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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 2013.10
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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 2013.10
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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 2013.9
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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 2013.4
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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
-
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 2012.12
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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 2012.2
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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
-
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 2011.11
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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 2011.11
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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 2011.9
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Spatial Distribution of Stable Sulfur Isotope Ratio in Coal Samples in East Asian Region
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 2011.1
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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
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Chemical characterization of snowfall in Shinjo, Yamagata Prefecture, Japan and long-term trend of snow acidification during 1991/92 to 2002/03
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 2009.7
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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 2009.2
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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 2008.8
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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 2008.6
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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 2008.3
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Sulfur isotope ratio of sulfate in rime collected at Mt. Zao, Yamagata Prefecture, Japan
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 2008.3
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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 2007.7
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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
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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
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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
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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 2005.7
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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 2005.4
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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
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Eolian dust may be an effective expander of HBRA: a case of China-Ryukyu connection
M Furukawa, W Zhuo, S Tokonami, N Akata, Q Guo
HIGH LEVELS OF NATURAL RADIATION AND RADON AREAS: RADIATION DOSE AND HEALTH EFFECTS 1276 307 - 308 2005
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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
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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 2003.12
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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 2003.9
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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 2003.9
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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
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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
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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
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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) 2002.7
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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 2002.4
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Sulfur Isotope Ratios of Coals used in East Asia.
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 2002.1
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Features of "red snow" which fell in Tohoku district in January and March, 2001.
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 2001.11
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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 2001.6
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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 2001.1
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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 2001.1
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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 1998.12