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Journal Articles

Distribution of cesium-bearing microparticles in the paddy field and their effect on transfer factor of radioactive cesium for brown rice

Tatsuno, Takahiro*; Nihei, Naoto*; Yoshimura, Kazuya

Journal of Radioanalytical and Nuclear Chemistry, 334(8), p.5719 - 5727, 2025/08

https://doi.org/10.1007/s10967-025-10312-x

Journal Articles

A New analytical technique utilizing the PdI$$_{2}$$ target for measurement of $$^{129}$$I in environmental samples by accelerator mass spectrometry

Honda, Maki; Takaku, Yuichi*; Sakaguchi, Aya*; Matsuzaki, Hiroyuki*; Sueki, Keisuke*

Journal of Radioanalytical and Nuclear Chemistry, 12 Pages, 2025/08

https://doi.org/10.1007/s10967-025-10324-7
 Times Cited Count：0 Percentile：0.00

A series of in-house PdI$$_{2}$$ standards appropriate for AMS was prepared by quantitatively mixing the $$^{129}$$I/$$^{127}$$I isotope standard solution and $$^{127}$$I solution. The dominant interferences from $$^{104, 105}$$Pd $$^{4+}$$ were successfully suppressed by adjusting the electrostatic cylindrical analyser, etc., to select the ion beams finely. As a result, the $$^{129}$$I/$$^{127}$$I atom ratios of PdI$$_{2}$$ prepared from the seawater and dolomite samples agreed with those prepared as AgI, respectively. The pretreatment time for the new method was shortened by 33% compared to the conventional method. This study demonstrated a new approach to $$^{129}$$I analysis in AMS that departs from conventional methods.

Journal Articles

Assessment of suspended sediment and $$^{137}$$Cs sources during the flood event in the Fukushima river using $$^{13}$$C and $$^{14}$$C

Nakanishi, Takahiro; Tsuruta, Tadahiko; Funaki, Hironori

Journal of Radioanalytical and Nuclear Chemistry, 7 Pages, 2025/07

https://doi.org/10.1007/s10967-025-10253-5
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

In this study, the radiocarbon isotope ratio, $$Delta$$$$^{14}$$C, was used to identify the sources of suspended sediment and $$^{137}$$Cs discharged into rivers after the Fukushima nuclear accident. Suspended sediments were collected during the flood event and under normal water conditions to determine $$^{137}$$Cs concentrations, $$Delta$$$$^{14}$$C, and stable carbon isotope ratios. The results indicated that the contribution of forest surface soil runoff increased during the flood peak. Furthermore, the distribution of $$^{137}$$Cs deposition in the watershed was reflected in temporal changes in suspended $$^{137}$$Cs concentration during the flood event. This approach provides a comprehensive understanding of both $$^{137}$$Cs and carbon dynamics.

Journal Articles

Solvent extraction of tin in nitric acids; Evaluation of multiple extractants

Ito, Kengo*; Takahashi, Shin*; Kato, Chizu*; Fukutani, Satoshi*; Matsumura, Tatsuro; Fujii, Toshiyuki*

Journal of Radioanalytical and Nuclear Chemistry, 334, p.2467 - 2475, 2025/02

https://doi.org/10.1007/s10967-025-10003-7
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

In this study, the solvent extraction behavior of tin (Sn), specifically $$^{126}$$Sn, from high-level radioactive waste was evaluated using six different extractants in a HNO$$_{3}$$ system. Among the tested extractants, N,N-Didodecyl-2-hydroxyacetoamide (HAA) exhibited higher efficiency, still not sufficient for industrial implementation. In systems where HCl was added to HNO$$_{3}$$, both tributyl phosphate (TBP) and N,N,N,N'-tetra-2-ethylhexyl diglycolamide (TEHDGA) achieved D$$_{Sn}$$ values greater than 1 at $$>$$ 1 M HCl. However, due to practical challenges in industrial applications, HAA extraction in HNO$$_{3}$$ systems, particularly at low Sn concentrations (0.0008 M), may provide a more effective solution for Sn recovery.

Journal Articles

Development of HCl-free solid-phase extraction combined with ICP-MS/MS for rapid assessment of difficult-to-measure radionuclides, 3; Measurement of $$^{79}$$Se concentration in concrete rubble

Banjarnahor, I. M.; Do, V. K.; Furuse, Takahiro; Ota, Yuki; Tanaka, Kosuke

Journal of Radioanalytical and Nuclear Chemistry, 10 Pages, 2025/00

https://doi.org/10.1007/s10967-025-10143-w
 Times Cited Count：0 Percentile：76.46(Chemistry, Analytical)

Journal Articles

Development of Cs separation methods from large amounts of soil samples to determine the $$^{135}$$Cs/$$^{137}$$Cs isotope ratio

Shimada, Asako; Tsukahara, Takehiko*; Nomura, Masao*; Takeda, Seiji

Journal of Radioanalytical and Nuclear Chemistry, 333(12), p.6297 - 6310, 2024/12

https://doi.org/10.1007/s10967-024-09749-3
 Times Cited Count：0 Percentile：33.61(Chemistry, Analytical)

Journal Articles

Solvent extraction of selenium in nitric acid; Evaluation of multiple extractants and proposal of a novel separation process

Ito, Kengo*; Kawakami, Takahiro*; Kato, Chizu*; Fukutani, Satoshi*; Matsumura, Tatsuro; Fujii, Toshiyuki*

Journal of Radioanalytical and Nuclear Chemistry, 333(10), p.5183 - 5189, 2024/10

https://doi.org/10.1007/s10967-024-09681-6
 Times Cited Count：1 Percentile：33.61(Chemistry, Analytical)

Solvent extraction behaviors of Se (VI) from nitric acid solutions were investigated with multiple extractants used for uranium, plutonium, minor actinides, and rare earthelements separation processes from high-level liquid waste. During the processes, Se remained in the residual aqueous solutions, as all extractants showed distributionratios $$<$$ 1. In contrast, Se showed distribution ratios $$>$$ 1 with $$o$$-phenylenediamine in dilute nitric acid ($$<$$ 2 M HNO$$_{3}$$), octanol as the organic phase, and concentrated nitric acid (8 M HNO$$_{3}$$) for back extraction, suggesting a potential new single separation process and recovery of Se.

Journal Articles

Investigation of adsorption mechanism of Mo(VI) by baker's yeast and applicability to the uranium liquid waste treatment process

Arai, Yoichi; Hasegawa, Kenta; Watanabe, So; Watanabe, Masayuki; Minowa, Kazuki*; Matsuura, Haruaki*; Hagura, Naoto*; Katsuki, Kenta*; Arai, Tsuyoshi*; Konishi, Yasuhiro*

Journal of Radioanalytical and Nuclear Chemistry, 333(7), p.3585 - 3593, 2024/07

https://doi.org/10.1007/s10967-023-09278-5
 Times Cited Count：1 Percentile：17.48(Chemistry, Analytical)

Journal Articles

Development of a non-destructive carbon quantification method in iron by negative muon lifetime measurement

Ninomiya, Kazuhiko*; Kubo, Kenya*; Inagaki, Makoto*; Yoshida, Go*; Takeshita, Soshi*; Tampo, Motonobu*; Shimomura, Koichiro*; Kawamura, Naritoshi*; Strasser, P.*; Miyake, Yasuhiro*; et al.

Journal of Radioanalytical and Nuclear Chemistry, 333(7), p.3445 - 3450, 2024/07

https://doi.org/10.1007/s10967-023-09289-2
 Times Cited Count：1 Percentile：33.61(Chemistry, Analytical)

Journal Articles

Application of deep metric learning model to microscope image analysis for the determination of UOC samples in nuclear forensics analysis

Kimura, Yoshiki; Matsumoto, Tetsuya*; Yamaguchi, Tomoki

Journal of Radioanalytical and Nuclear Chemistry, 333(7), p.3541 - 3551, 2024/07

https://doi.org/10.1007/s10967-023-09300-w
 Times Cited Count：1 Percentile：33.61(Chemistry, Analytical)

Journal Articles

Water extraction of technetium-99m from neutron irradiated porous molybdenum dioxide pellet

Hu, X.*; Fujita, Yoshitaka; Tsuchiya, Kunihiko; Fukutani, Satoshi*; Hori, Junichi*; Suzuki, Tatsuya*

Journal of Radioanalytical and Nuclear Chemistry, 333(11), p.6057 - 6063, 2024/05

https://doi.org/10.1007/s10967-024-09529-z
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

no abstracts in English

Journal Articles

Development of a process for the separation of MA(III) from Ln(III) fission products using HONTA impregnated adsorbent

Kubota, Masahiko*; Kim, S.-Y.*; Wu, H.*; Watanabe, So; Sano, Yuichi; Takeuchi, Masayuki; Arai, Tsuyoshi*

Journal of Radioanalytical and Nuclear Chemistry, 333(5), p.2413 - 2420, 2024/05

https://doi.org/10.1007/s10967-024-09471-0

Journal Articles

$$^{137}$$Cs contamination of Japanese mustard spinach by resuspended particles in areas with different contamination conditions

Tatsuno, Takahiro*; Yoshimura, Kazuya; Nihei, Naoto*

Journal of Radioanalytical and Nuclear Chemistry, 333(3), p.1089 - 1096, 2024/03

https://doi.org/10.1007/s10967-023-09347-9
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

Journal Articles

Effect of $$^{226}$$Ra purity as a target for $$^{225}$$Ac production using a fast reactor

Sasaki, Yuto; Maeda, Shigetaka

Journal of Radioanalytical and Nuclear Chemistry, 333, p.5987 - 5996, 2024/02

https://doi.org/10.1007/s10967-024-09397-7
 Times Cited Count：1 Percentile：33.61(Chemistry, Analytical)

Researchers are seeking alternative $$^{225}$$Ac production methods because of the scarcity of $$^{225}$$Ac for targeted alpha therapy. Although $$^{226}$$Ra from waste sources has been considered, obtaining $$^{226}$$Ra is challenging. Therefore, the authors focused on the contamination of minerals with $$^{232}$$Th-derived $$^{228}$$Ra while investigating methods to recover $$^{226}$$Ra from uranium ores. The effect of 228Ra contamination on $$^{225}$$Ac production by $$^{226}$$Ra transmutation using fast reactors was evaluated. Consequently, toxic $$^{228}$$Ac contaminates $$^{225}$$Ac. However, using the different half-lives of $$^{225}$$Ac and $$^{228}$$Ac, pure $$^{225}$$Ac can be obtained from the chemical separation of actinium after cooling for 5-8 days.

Journal Articles

Extraction of $$^{99}$$Mo hot atoms made by a neutron capture method from $$alpha$$-MoO$$_{3}$$ to water

Quach, N. M.*; Ngo, M. C.*; Yang, Y.*; Nguyen, T. B.*; Nguyen, V. T.*; Fujita, Yoshitaka; Do, T. M. D.*; Nakayama, Tadachika*; Suzuki, Tatsuya*; Suematsu, Hisayuki*

Journal of Radioanalytical and Nuclear Chemistry, 332(10), p.4057 - 4064, 2023/10

https://doi.org/10.1007/s10967-023-09125-7
 Times Cited Count：5 Percentile：70.39(Chemistry, Analytical)

Technetium-99m ($$^{99m}$$Tc) is the most widely used medical radioisotope in the world and is produced from molybdenum-99 ($$^{99}$$Mo). Production of $$^{99}$$Mo via the neutron capture method draws attention as an alternative to fission-derived $$^{99}$$Mo due to non-proliferation issues, but the specific radioactivity of $$^{99}$$Mo is extremely low. In this work, a porous $$alpha$$-MoO$$_{3}$$ wire was prepared as an irradiation target in order to improve the specific activity by extracting $$^{99}$$Mo. Porous $$alpha$$-MoO$$_{3}$$ wire is synthesized from Mo metal wire by a two-step heating procedure. The hot atom effect of $$^{99}$$Mo was confirmed by activity and isotope measurements of the porous $$alpha$$-MoO$$_{3}$$ wire after neutron irradiation and the water used for extraction. In term of the extraction effectiveness, the effectiveness of $$^{99}$$Mo extraction in the porous $$alpha$$-MoO$$_{3}$$ wire was comparable to that of commercial $$alpha$$-MoO$$_{3}$$ powder.

Journal Articles

Development of correction method for sample density effect on PGA

Maeda, Makoto; Segawa, Mariko; Toh, Yosuke; Endo, Shunsuke; Nakamura, Shoji; Kimura, Atsushi

Journal of Radioanalytical and Nuclear Chemistry, 332(8), p.2995 - 2999, 2023/08

https://doi.org/10.1007/s10967-023-08961-x
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

Journal Articles

$$^{137}$$Cs transfer from soils contaminated by resuspended particles to Japanese mustard spinach in difficult-to-return zone of Fukushima

Tatsuno, Takahiro*; Nihei, Naoto*; Yoshimura, Kazuya; Ote, Nobuhito*

Journal of Radioanalytical and Nuclear Chemistry, 332(6), p.1677 - 1686, 2023/06

https://doi.org/10.1007/s10967-023-08899-0
 Times Cited Count：2 Percentile：35.31(Chemistry, Analytical)

Journal Articles

Origin of Cs-bearing silicate glass microparticles observed during Fukushima accident and recommendations on nuclear safety

Hidaka, Akihide

Journal of Radioanalytical and Nuclear Chemistry, 332(6), p.1607 - 1623, 2023/03

https://doi.org/10.1007/s10967-023-08846-z
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

no abstracts in English

Journal Articles

Formation of MPd$$_{3+x}$$ (M = Gd, Np) by the reaction of MN with Pd and chlorination of MPd$$_{3+x}$$ using cadmium chloride

Hayashi, Hirokazu; Shibata, Hiroki; Sato, Takumi; Otobe, Haruyoshi

Journal of Radioanalytical and Nuclear Chemistry, 332(2), p.503 - 510, 2023/02

https://doi.org/10.1007/s10967-023-08760-4
 Times Cited Count：0 Percentile：0.00(Chemistry, Analytical)

The formation of MPd$$_{3+x}$$ (M = Gd, Np) by the reaction of MN with Pd at 1323 K in Ar gas flow was observed. Cubic AuCu$$_3$$-type GdPd$$_{3.3}$$ (${it a}$ = 0.4081 $$pm$$ 0.0001 nm) and NpPd$$_3$$ (${it a}$ = 0.4081 $$pm$$ 0.0001 nm) were identified, respectively. The product obtained from the reaction of NpN with Pd contained additional phases including the hexagonal TiNi$$_3$$-type NpPd$$_3$$. Chlorination of the MPd$$_{3+x}$$ (M = Gd, Np) samples was accomplished by the solid-state reaction using cadmium chloride at 673 K in a dynamic vacuum. Pd-rich solid solution phase saturated with Cd and an intermetallic compound PdCd were obtained as by-products of MCl$$_3$$ formation.

Journal Articles

Water contents in aggregates and cement pastes determined by gravimetric analysis and prompt $$gamma$$-ray analysis

Kinoshita, Norikazu*; Noto, Takuma*; Nakajima, Hitoshi*; Kosako, Kazuaki*; Kato, Takahiro*; Kuroiwa, Yoichi*; Kurabe, Misako*; Sasaki, Yuki*; Torii, Kazuyuki*; Maeda, Makoto; et al.

Journal of Radioanalytical and Nuclear Chemistry, 332(2), p.479 - 486, 2023/02

https://doi.org/10.1007/s10967-023-08776-w
 Times Cited Count：2 Percentile：35.31(Chemistry, Analytical)

283 (Records 1-20 displayed on this page)