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-ray analysis in J-PARC ANNRI and its applicationToh, Yosuke; Huang, M.; Ebihara, Mitsuru*; Segawa, Mariko; Tsuchiya, Harufumi; Maeda, Makoto; Kimura, Atsushi; Nakamura, Shoji
no journal, ,
no abstracts in English
Segawa, Mariko; Nishinaka, Ichiro*; Toh, Yosuke; Inoue, Toru*
no journal, ,
no abstracts in English
Sr in urine samples by extraction chromatography coupled to ICP-MS/MSTomita, Jumpei; Takeuchi, Erina
no journal, ,
no abstracts in English
Bessho, Kotaro*; Matsumura, Hiroshi*; Miura, Taichi*; Iimoto, Takeshi*; Kinoshita, Norikazu*; Sakaguchi, Aya*; Sugihara, Shinji*; Takamiya, Koichi*; Tagami, Keiko*; Nagao, Seiya*; et al.
no journal, ,
Workshop on Environmental Radioactivity was established in 2000 and has been held every year on February or March at KEK, Tsukuba. The proceedings with peer review has been published after every workshop. After the accident at the TEPCO Fukushima Daiichi Nuclear Power Plant occurred in 2011, large number of scientific reports related to the accident were presented in this workshop. Researchers, technicians, local government staff, and general citizens have participated in the workshop to exchange information on various subjects. The organizing members of the workshop summarized 326 reports in the workshop during 2012 to 2016 and related publications. The summary report was published as follows. KEK Report 2016-3 (ISBN978-4-9907232-9-3)
Tomita, Ryohei; Esaka, Fumitaka; Miyamoto, Yutaka
no journal, ,
In the previous study, we developed a combination method of particle manipulation and secondary ion mass spectrometry (SIMS) for removing the interferences from other elements in other particles. Since the particles were selected randomly and manipulated, it caused the problem not to cover the range of 
U/
U isotope ratio in the sample. In this study, we improved the procedure of analyzing uranium isotope ratios in individual particles by SIMS to cover the range of U/U in the sample.
Tagomori, Hisaya; Ishii, Yasuo; Kanaizuka, Seiichi*; Dohi, Terumi; Iijima, Kazuki
no journal, ,
In order to evaluate the chemical form and distribution of radionuclide in soil and litter near the Fukushima Daiichi Nuclear Power Plant, method for isolating radioactive particles were carried out. Main procedures for isolating radioactive particles are as follows; After drying and size classification, samples are decomposed with hydrogen peroxide. And then, IP method is carried out to monitor the distribution of radionuclide. A portion showing high radiation is selected as microscopic analysis which composed of Field Emission-Electron Prove Micro-Analyzer (FE-EPMA) and Energy-Dispersive X-ray Spectroscopy (EDS). As results of above method, several particles with unique elemental compositions such as Ba was identified. Moreover, methods for isolating particles of 100 - 200 um using the Micro Manipulator were established. The isolation of fine particles (less than 50 um), were also applied by the meaning of digging a trench on the carbon tape using Focused Ion Beam (FIB).
Cu for cancer therapy, produced with accelerator neutrons by deuteronsHashimoto, Kazuyuki*; Kawabata, Masako*; Saeki, Hideya*; Sato, Shunichi*; Tsukada, Kazuaki; Sugo, Yumi*; Nagai, Yasuki*; Hatsukawa, Yuichi*; Ishioka, Noriko*
no journal, ,
no abstracts in English
Cl in surface soils near the Fukushima Dai-ichi Nuclear Power Plant using accelerator mass spectrometryOta, Yuki*; Sueki, Keisuke*; Sasa, Kimikazu*; Takahashi, Tsutomu*; Matsunaka, Tetsuya*; Matsumura, Masumi*; Tosaki, Yuki*; Hosoya, Seiji*; Takano, Kenta*; Ochiai, Yuta*; et al.
no journal, ,
no abstracts in English
Minowa, Haruka*; Yoshikawa, Hideki; Nakama, Shigeo; Satou, Yukihiko; Sueki, Keisuke*
no journal, ,
no abstracts in English
Sr with accelerator mass spectrometryHosoya, Seiji*; Sasa, Kimikazu*; Takahashi, Tsutomu*; Honda, Maki*; Satou, Yukihiko; Takano, Kenta*; Ochiai, Yuta*; Yamaguchi, Koji*; Sueki, Keisuke*
no journal, ,
no abstracts in English
Sb and 
I in radioactive particles derived from FDNPPMatsuo, Kazuki*; Sueki, Keisuke*; Satou, Yukihiko; Yoshikawa, Hideki; Minowa, Haruka*; Sasa, Kimikazu*; Matsunaka, Tetsuya*; Matsumura, Masumi*; Takahashi, Tsutomu*; Sakaguchi, Aya*
no journal, ,
no abstracts in English
Tomitsuka, Tomohiro; Tokoi, Katsuyuki*; Sato, Tetsuya; Asai, Masato; Tsukada, Kazuaki; Toyoshima, Atsushi; Chiera, N. M.; Kamada, Hiroki; Nagame, Yuichiro; Goto, Shinichi*
no journal, ,
no abstracts in English
Toyoshima, Atsushi; Aoyagi, Noboru
no journal, ,
Although carrier-free radiotracers are utilized in lots of research fields, their chemical forms have not been identified by UV/vis. spectroscopy because of their micro quantities. In this study, we are developing an apparatus for cavity ring-down spectroscopy to perform absorption spectroscopy of radioiodine and astatine in a gas-phase. With this apparatus, ultra-sensitive absorption measurement is realized by making injected pulse-laser go back and forth tens of thousand times between facing mirrors. Intensity of laser in the cavity becomes weaker by its escaping through the mirrors and by absorption by samples. Absorption coefficients are obtained from difference in the life-time of escaped light between blank and sample measurements. Chemical species are expected to be characterized by measuring absorption coefficients at various wavelength and comparing these with known spectra and theoretical calculations. In the symposium, present status of the development will be reported.
Chiera, N. M.
no journal, ,
Ouchi, Kazuki; Otobe, Haruyoshi; Kitatsuji, Yoshihiro
no journal, ,
In this study, we investigated the change on standing of deposition amount and the catalysis by the deference of deposit states to obtain knowledge of the reactivity of electrodeposited U(IV). From the change of deposition amount, we found that the decrease of U deposits is caused by oxidative dissolution. Next, the rates of the reduction and deposition of U on the electrode surface deposited U deposits in various states were measured. From those results, we found that U deposits in more stable state have better catalytic activity.