Papers - YAMADA RYOHEI
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External radiation exposure via car-borne survey among returnees in former restricted regions in Fukushima a decade after the nuclear accident
Yasutaka Omori, Yuki Oda, Masahiro Hosoda, Yasuyuki Taira, Mayumi Shimizu, Ryohei Yamada, Hirofumi Tazoe, Masaru Yamaguchi, Minoru Osanai, Naofumi Akata, Shinji Tokonami
Scientific Reports 2026.5
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Radiation Research at Hirosaki University after the Fukushima Accident: Contributions to Public Health, Education, and Community Resilience
Masahiro Hosoda, Donovan Anderson, Ryohei Yamada, Yohei Fujishima, Kazutaka Tanaka, Hiromi Kudo, Yasutaka Omori, Chutima Kuranrod, Hirofumi Tazoe, Naofumi Akata, Chieko Itaki, Tomisato Miura, Ikuo Kashiwakura, Shinji Tokonami
Radiation Medicine and Protection 2026.5
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Monte Carlo simulation to optimize measurement geometry of continuous air monitor with Si semiconductor detector
Yuki Tamakuma, Hiroki Hashimoto, Manaya Taoka, Ryohei Yamada, Kazuki Iwaoka, Yasutaka Omori, Masahiro Hosoda, Shinji Tokonami
Radiation Physics and Chemistry 241 113507 2026.4
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Indoor and outdoor exposure to atmospheric radionuclides in areas affected by the Fukushima nuclear accident
Yuki Tamakuma, Donovan Anderson, Chutima Kranrod, Yasuyuki Taira, Yuki Oda, Yasutaka Omori, Hirofumi Tazoe, Tetsuya Sanada, Koya Ogura, Masahide Furukawa, Yoshitaka Shiroma, Hiromi Kudo, Mayumi Shimizu, Ryohei Yamada, Naofumi Akata, Masahiro Hosoda, Shinji Tokonami
Science of The Total Environment 1008 181027 2025.12
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Optimization and validation of combustion-based analysis of organically bound tritium in pine needles
Haruka Kuwata, Khemruthai Kheamsiri, Ryohei Yamada, Toshiya Tamari, Hideki Kakiuchi, Masahiro Tanaka, Naofumi Akata
Journal of Radioanalytical and Nuclear Chemistry 334 ( 5 ) 3185 - 3192 2025.5
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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 59 ( 10 ) 4906 - 4914 2025.3
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Structure shielding of school and gymnasium buildings against fallout gamma radiation from the Fukushima Daiichi Nuclear Power Plant accident
Manaya Taoka, Rui Kudo, Ryohei Yamada, Yasutaka Omori, Kazutaka Tanaka, Masahiro Hosoda, Shinji Tokonami
Ecotoxicology and Environmental Safety 288 117394 2024.12
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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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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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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
Mizuki Kiso, Manaya Taoka, Aoi Sampei, Hiroki Hashimoto, Yuki Abe, Yuki Oda, Yasutaka Omori, Ryohei Yamada, Masahiro Hosoda, Chutima Kranrod, Tetsuo Ishikawa, Shinji Tokonami
Radiation Protection Dosimetry 200 ( 16-18 ) 1671 - 1675 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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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 2024.8
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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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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 2024.5
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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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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 Natural Spring Water 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 2023.4