論文 - 山田 椋平
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Optimization and validation of combustion-based analysis of organically bound tritium in pine needles
Kuwata, H; Kheamsiri, K; Yamada, R; Tamari, T; Kakiuchi, H; Tanaka, M; Akata, N
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 334 ( 5 ) 3185 - 3192 2025年05月
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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 59 ( 10 ) 4906 - 4914 2025年03月
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Structure shielding of school and gymnasium buildings against fallout gamma radiation from the Fukushima Daiichi Nuclear Power Plant accident
Taoka, M; Kudo, R; Yamada, R; Omori, Y; Tanaka, K; Hosoda, M; Tokonami, S
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 288 117394 2024年12月
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Atmospheric concentrations of <SUP>7</SUP>Be and <SUP>210</SUP>Pb 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
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Tritium determination in natural water samples in Fukushima from 2022 to 2023 using an ultra-low-level tritium counting system
Hegedus, 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
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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
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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
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Effect of sampling face velocity on the ultrafine particle surface collection efficiency of a cellulose membrane filter and a cellulose-glass fiber filter for environmental airborne radioactivity monitoring
Kiso, M; Taoka, M; Sampei, A; Hashimoto, H; Abe, Y; Oda, Y; Omori, Y; Yamada, R; Hosoda, M; Kranrod, C; Ishikawa, T; Tokonami, S
RADIATION PROTECTION DOSIMETRY 200 ( 16-18 ) 1671 - 1675 2024年11月
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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
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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
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Performance Test of Improved Commercially Available Tritium Enrichment System: Toward Rapid and High Efficiency Enrichment
Naofumi Akata, Kazusa Okada, Nao Otashiro, Haruka Kuwata, Khemruthai Kheamsiri, Kaho Ohno, Yukiko Yoshinaka, Ryohei Yamada, Masahiro Tanaka
Radiation Environment and Medicine 13 ( 2 ) 60 - 64 2024年08月
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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年07月
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Tritium concentration in bottled drinking water and internal dose assessment
Kheamsiri, K; Akata, N; Kuwata, H; Tanaka, M; Hosoda, M; Sasaki, M; Shiroma, Y; Tokonami, S; Yamada, R; Kranrod, C; Iwaoka, K; Kovács, T
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 333 ( 5 ) 2597 - 2603 2024年05月
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Changes in Particulate Matter (PM2.5 and PM10) Concentrations and Ambient Dose Equivalent Rates at Different Altitudes in Chiang Mai, Thailand
Chutima Kranrod, Tarika Thumviji, Ryohei Yamada, Worawat Poltabtim, Mizuki Kiso, Sompong Sriburee, Siriprapa Somboon, Kewalin Ruktinnakorn, Shinji Tokonami
Radiation Environment and Medicine 13 ( 1 ) 28 - 34 2024年02月
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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
Yamada, R; Hasegawa, H; Akata, N; Kakiuchi, H; Ochiai, S; Kuwata, H; Kheamsiri, K; Tokonami, S; Ueda, S
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 31 ( 5 ) 7818 - 7827 2024年01月
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Calibration experiments for radon in drinking water measurements using portable-type electrostatic-collection radon monitors
Hosoda, M; Omori, Y; Hashimoto, H; Matsumoto, M; Yasuoka, Y; Sanada, T; Oda, Y; Kiso, M; Sampei, A; Kranrod, C; Tazoe, H; Akata, N; Taira, Y; Tamakuma, Y; Yamada, R; Kudo, H; Shimizu, M; Tokonami, S
RADIATION PROTECTION DOSIMETRY 199 ( 18 ) 2203 - 2206 2023年11月
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Tritium Concentration in Natural SpringWater Collected at Hirosaki, Japan
Akata Naofumi, Okada Kazusa, Kuwata Haruka, Kheamsiri Khmruthai, Hosoda Masahiro, Tazoe Hirofumi, Yasuhara Ryo, Sugihara Shinji, Yamada Ryohei, Tanaka Masahiro
PLASMA AND FUSION RESEARCH 18 ( 0 ) 2405030 - 2405030 2023年04月
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INFLUENCE OF SAMPLING FLOW RATE ON THORON EXHALATION RATE MEASUREMENTS BY THE CIRCULATION METHOD
Hosoda Masahiro, Yamada Ryohei, Kobyashi Hiromu, Tamakuma Yuki, Nugraha Eka Djatnika, Hashimoto Hiroki, Negami Ryoju, Kranrod Chutima, Omori Yasutaka, Tazoe Hirofumi, Akata Naofumi, Tokonami Shinji
RADIATION PROTECTION DOSIMETRY 198 ( 13-15 ) 904 - 908 2022年09月
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Rn-222 and Ra-226 Concentrations in Spring Water and Their Dose Assessment Due to Ingestion Intake
Yamada Ryohei, Hosoda Masahiro, Tabe Tomomi, Tamakuma Yuki, Suzuki Takahito, Kelleher Kevin, Tsujiguchi Takakiyo, Tateyama Yoshiki, Nugraha Eka Djatnika, Okano Anna, Narumi Yuki, Kranrod Chutima, Tazoe Hirofumi, Iwaoka Kazuki, Yasuoka Yumi, Akata Naofumi, Sanada Tetsuya, Tokonami Shinji
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 19 ( 3 ) 1758 - 1758 2022年02月
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A Preliminary Study of Radon Equilibrium Factor at a Tourist Cave in Okinawa, Japan
Yamada Ryohei, Tamakuma Yuki, Suzuki Takahito, Nakasone Shunya, Shiroma Yoshitaka, Furukawa Masahide, Hashimoto Hiroki, Hosoda Masahiro, Akata Naofumi, Tokonami Shinji
ATMOSPHERE 12 ( 12 ) 1648 - 1648 2021年12月
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Comprehensive exposure assessments from the viewpoint of health in a unique high natural background radiation area, Mamuju, Indonesia
Nugraha Eka Djatnika, Hosoda Masahiro, Kusdiana, Untara, Mellawati June, Nurokhim, Tamakuma Yuki, Ikram Abarrul, Syaifudin Mukh, Yamada Ryohei, Akata Naofumi, Sasaki Michiya, Furukawa Masahide, Yoshinaga Shinji, Yamaguchi Masaru, Miura Tomisato, Kashiwakura Ikuo, Tokonami Shinji
SCIENTIFIC REPORTS 11 ( 1 ) 14578 2021年07月
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Discriminative Measurement of Absorbed Dose Rates in Air from Natural and Artificial Radionuclides in Namie Town, Fukushima Prefecture
Ogura Koya, Hosoda Masahiro, Tamakuma Yuki, Suzuki Takahito, Yamada Ryohei, Negami Ryoju, Tsujiguchi Takakiyo, Yamaguchi Masaru, Shiroma Yoshitaka, Iwaoka Kazuki, Akata Naofumi, Shimizu Mayumi, Kashiwakura Ikuo, Tokonami Shinji
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 18 ( 3 ) 978 - 978 2021年02月
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Long-Term Measurements of Radon and Thoron Exhalation Rates from the Ground Using the Vertical Distributions of Their Activity Concentrations
Modibo Oumar Bobbo, Tamakuma Yuki, Suzuki Takahito, Yamada Ryohei, Zhuo Weihai, Kranrod Chutima, Iwaoka Kazuki, Akata Naofumi, Hosoda Masahiro, Tokonami Shinji
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 18 ( 4 ) 1489 - 1489 2021年02月
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A unique high natural background radiation area - Dose assessment and perspectives
Hosoda Masahiro, Nugraha Eka Djatnika, Akata Naofumi, Yamada Ryohei, Tamakuma Yuki, Sasaki Michiya, Kelleher Kevin, Yoshinaga Shinji, Suzuki Takahito, Rattanapongs Chanis Pornnumpa, Furukawa Masahide, Yamaguchi Masaru, Iwaoka Kazuki, Sanada Tetsuya, Miura Tomisato, Kusdiana, Iskandar Dadong, Pudjadi Eko, Kashiwakura Ikuo, Tokonami Shinji
SCIENCE OF THE TOTAL ENVIRONMENT 750 142346 - 142346 2021年01月
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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年08月
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Lessons From a Japan-Korea Collaboration on Medical Response Training for a Nuclear or Radiological Emergency, Assuming Mass Casualty
Tsujiguchi Takakiyo, Kitajima Maiko, Tomisawa Toshiko, Shiroto Yuki, Yamada Ryohei, Saito Kyoji, Hanada Hiroyuki, Jin Young Woo, Cho Minsu, Jang Seongjae, Kim Hyunjung, Pak Minjung, Nakamura Toshiya
DISASTER MEDICINE AND PUBLIC HEALTH PREPAREDNESS 14 ( 4 ) 431 - 432 2020年08月
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Cesium concentrations in various environmental media at Namie, Fukushima
Hegedus M., Shiroma Y., Iwaoka K., Hosoda M., Suzuki T., Tamakuma Y., Yamada R., Tsujiguchi T., Yamaguchi M., Ogura K., Tazoe H., Akata N., Kashiwakura I, Tokonami S.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 323 ( 1 ) 197 - 204 2020年01月
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COMPARATIVE STUDY ON PERFORMANCE OF VARIOUS ENVIRONMENTAL RADIATION MONITORS
Tamakuma Y., Yamada R., Suzuki T., Kuroki T., Saga R., Mizuno H., Sasaki H., Iwaoka K., Hosoda M., Tokonami S.
RADIATION PROTECTION DOSIMETRY 184 ( 3-4 ) 307 - 310 2019年10月
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A portable radioactive plume monitor using a silicon photodiode
Yuki Tamakuma , Ryohei Yamada , Kazuki Iwaoka , Masahiro Hosoda , Tomohiro Kuroki , Hiroyuki Mizuno , Koji Yamada , Masahide Furukawa , Shinji Tokonami
Perspectives in Science 12 100414 - 100414 2019年07月
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市販の大気中放射性エアロゾル捕集用フィルタの表面捕集効率及び流量の安定性の評価
玉熊 佑紀, 山田 椋平, 岩岡 和輝, 細田 正洋, 床次 眞司
保健物理 54 ( 1 ) 5 - 12 2019年04月
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Study of chemical etching conditions for alpha-particle detection and visualization using solid state nuclear track detectors
Ryohei Yamada, Taiki Odagiri, Kazuki Iwaoka, Masahiro Hosoda, Shinji Tokonami
Radiation Environment and Medicine 8 ( 1 ) 21 - 25 2019年02月
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Measurement system for alpha and beta emitters with continuous air sampling under different exposure situations
Yamada Ryohei, Tamakuma Yuki, Iwaoka Kazuki, Hosoda Masahiro, Shiroma Yoshitaka, Akata Naofumi, Mizuno Hiroyuki, Yamada Kouji, Kuroki Tomohiro, Tokonamia Shinji
APPLIED RADIATION AND ISOTOPES 126 79 - 82 2017年08月
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Characteristic of thoron (Rn-220) in environment
Hosoda Masahiro, Kudo Hiromi, Iwaoka Kazuki, Yamada Ryohei, Suzuki Takahito, Tamakuma Yuki, Tokonami Shinji
APPLIED RADIATION AND ISOTOPES 120 7 - 10 2017年02月