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Journal Articles

Sulfate complexation of element 104, Rf, in H$$_{2}$$SO$$_{4}$$/HNO$$_{3}$$ mixed solution

Li, Z.*; Toyoshima, Atsushi; Asai, Masato; Tsukada, Kazuaki; Sato, Tetsuya; Sato, Nozomi; Kikuchi, Takahiro; Nagame, Yuichiro; Sch$"a$del, M.; Pershina, V.*; et al.

Radiochimica Acta, 100(3), p.157 - 164, 2012/03

 Times Cited Count:13 Percentile:69.01(Chemistry, Inorganic & Nuclear)

Journal Articles

Fabrication of polymer optical waveguides for the 1.5-$$mu$$m band using focused proton beam

Miura, Kenta*; Machida, Yuki*; Uehara, Masato*; Kiryu, Hiromu*; Ozawa, Yusuke*; Sasaki, Tomoyuki*; Hanaizumi, Osamu*; Sato, Takahiro; Ishii, Yasuyuki; Koka, Masashi; et al.

Key Engineering Materials, 497, p.147 - 150, 2012/00

 Times Cited Count:7 Percentile:95.12(Engineering, Electrical & Electronic)

Journal Articles

Fabrication of polymer optical waveguides for the 1.5-$$mu$$m band using focused proton beam

Miura, Kenta*; Machida, Yuki*; Uehara, Masato*; Kiryu, Hiromu*; Ozawa, Yusuke*; Sasaki, Tomoyuki*; Hanaizumi, Osamu*; Sato, Takahiro; Ishii, Yasuyuki; Koka, Masashi; et al.

Key Engineering Materials, 497, p.147 - 150, 2011/12

 Times Cited Count:6 Percentile:2.48

Journal Articles

Superconducting MgB$$_2$$ thin film detector for neutrons

Ishida, Takekazu*; Nishikawa, Masatoshi*; Fujita, Yoshifumi*; Okayasu, Satoru; Katagiri, Masaki*; Sato, Kazuo*; Yotsuya, Tsutomu*; Shimakage, Hisashi*; Miki, Shigehito*; Wang, Z.*; et al.

Journal of Low Temperature Physics, 151(3-4), p.1074 - 1079, 2008/05

 Times Cited Count:36 Percentile:78.05(Physics, Applied)

The superconducting neutron detector using high-quality $$^{10}$$B-enriched MgB$$_2$$ thin films at higher operating temperatures has been proposed, where a resistance change induced by the nuclear reaction of neutron and $$^{10}$$B in MgB$$_2$$ is used to detect a neutron. Cold neutrons from a nuclear research reactor irradiated the MgB$$_2$$ detector, and the output voltage was clearly observed through a low-noise amplifier by using a digital oscilloscope. The out-of-equilibrium thermodynamics was investigated by means of the time-dependent Ginzburg-Landau equations by using the Earth Simulator.

Journal Articles

Research and development of nuclear fusion

Ushigusa, Kenkichi; Seki, Masahiro; Ninomiya, Hiromasa; Norimatsu, Takayoshi*; Kamada, Yutaka; Mori, Masahiro; Okuno, Kiyoshi; Shibanuma, Kiyoshi; Inoue, Takashi; Sakamoto, Keishi; et al.

Genshiryoku Handobukku, p.906 - 1029, 2007/11

no abstracts in English

Journal Articles

Promising fast reactor systems in the feasibility study on commercialized FR cycle systems

Sakamoto, Yoshihiko; Kotake, Shoji; Nishikawa, Akira; Enuma, Yasuhiro; Ando, Masato; Sagayama, Yutaka

Proceedings of 13th International Conference on Nuclear Engineering (ICONE-13), 0 Pages, 2005/05

The Feasibility Study on Commercialized Fast Reactor (FR) Cycle Systems is under way in order to propose prominent FR cycle systems that will respond to the diverse needs of society in the future. The design studies on various FR system concepts have been achieved and then the evaluations of potential to achieve the development targets have been carried out. Crucial issues have been found out for each FR system concept and their development plans for the key technologies are summarized as the roadmap. The characteristics and the differences in performances have been investigated. The crucial issues and the development periods have been clarified. Further investigation is now in progress. The promising concept will be proposed based on result of comparative evaluation at the end of the Phase II study.

Journal Articles

The Promising Fast Reactor Systems ans Their Development Plans in Japan

Kotake, Shoji; Sakamoto, Yoshihiko; Enuma, Yasuhiro; Ando, Masato; Nishikawa, Akira; Sagayama, Yutaka

Proceedings of 2005 International Congress on Advances in Nuclear Power Plants (ICAPP '05), 0 Pages, 2005/05

The Feasibility Study on Commercialized Fast Reactor (FR) Cycle Systems is under way in order to propose prominent FR cycle systems that will respond to the diverse needs of society in the future. The design studies on various FR system concepts have been achieved and then the evaluations of potential to achieve the development targets have been carried out. Crucial issues have been found out for each FR system concept and their development plans for the key technologies are summarized as the roadmap. The characteristics and the differences in performances have been investigated. The crucial issues and the development periods have been clarified. Further investigation is now in progress. The promising concept will be proposed based on result of comparative evaluation at the end of the Phase II study.

Journal Articles

Evolution of the electronic structure from electron-doped to hole-doped states in the two-dimensional Mott-Hubbard system La$$_{1.17-x}$$Pb$$_{x}$$VS$$_{3.17}$$

Ino, Akihiro*; Okane, Tetsuo; Fujimori, Shinichi; Fujimori, Atsushi; Mizokawa, Takashi*; Yasui, Yukio*; Nishikawa, Takashi*; Sato, Masatoshi*

Physical Review B, 69(19), p.195116_1 - 195116_8, 2004/05

A2004-0402.pdf:0.46MB

 Times Cited Count:7 Percentile:37.69(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Promising Fast Reactor Systems in the Feasibility Study on Commercialized FR Cycle Systems

Sakamoto, Yoshihiko; Sakamoto, Yoshihiko; Enuma, Yasuhiro; Ando, Masato; Nishikawa, Akira; Kotake, Shoji; Ieda, Yoshiaki

Dai-14-Kai Kantaiheiyo Genshiryoku Kaigi (2004-Nen 3-Gatsu 21-Nichi$$sim$$25-Nichi), 0 Pages, 2003/00

This paper describes the summary of an interim report of phase II of the Feasibility Study on Commercialized FR Cycle Systems, related to reactor systems. Promising plant concepts (sodium-, lead-bismuth-, helium-, and water-cooled fast reactor) and reactor core concepts are presented. These concepts are quantitatively evaluated from the viewpoint of the suitability to the development targets, such as economic competitiveness, efficient utilization of resources and reduction of environmental burden, with securing safety. As results, sodium cooled fast reactor is well suited to the development targets. LBE cooled fast rector would have a potential to attain the development targets. Helium gas cooled fast reactor would have the great potential for high thermal efficiency and multipurpose energy system. And water cooled fast reactor has the advantage that there are many experiences with LWR. Furthermore the crucial issues for technical feasibility are also clarified as road map of key technology development for each concept.

Oral presentation

Micro-machining of resist materials using MeV proton microbeams

Uchiya, Naoyuki*; Harada, Takuya*; Murai, Masato*; Nishikawa, Hiroyuki*; Haga, Junji; Sato, Takahiro; Oikawa, Masakazu*; Sakai, Takuro; Ishii, Yasuyuki; Fukuda, Mitsuhiro*; et al.

no journal, , 

no abstracts in English

Oral presentation

Fabrication of PMMA waveguides for the 1.5-$$mu$$m-wavelength range by using proton beam writing

Miura, Kenta*; Machida, Yuki*; Uehara, Masato*; Hanaizumi, Osamu*; Ishii, Yasuyuki; Sato, Takahiro; Takano, Katsuyoshi; Okubo, Takeru; Yamazaki, Akiyoshi; Inoue, Aichi; et al.

no journal, , 

no abstracts in English

Oral presentation

Anion-exchange behavior of element-105, Db in HF/HNO$$_{3}$$ mixed solution

Kasamatsu, Yoshitaka*; Toyoshima, Atsushi; Asai, Masato; Tsukada, Kazuaki; Li, Z.; Ishii, Yasuo; Sato, Tetsuya; Nishinaka, Ichiro; Kikuchi, Takahiro; Haba, Hiromitsu*; et al.

no journal, , 

Dubnium-262 was produced in the $$^{248}$$Cm($$^{19}$$F, 5n) reaction at the JAEA tandem accelerator. Reaction products were rapidly transported by a He/KF gas-jet system to the chemistry laboratory. Anion-exchange behavior of Db in HF/HNO$$_{3}$$ solution was then investigated using the newly developed on-line ion-exchange and $$alpha$$-particle detection apparatus. Distribution coefficients of Db were clearly smaller than those of Ta, the closest homologue in the periodic table, and were close to those of lighter homologue Nb and also the pseudo homologue Pa. Fluoride complex formation of Db will be discussed.

Oral presentation

Fabrication of polymer optical waveguides using proton beam writing

Machida, Yuki*; Uehara, Masato*; Miura, Kenta*; Hanaizumi, Osamu*; Ishii, Yasuyuki; Sato, Takahiro; Takano, Katsuyoshi; Okubo, Takeru; Yamazaki, Akiyoshi; Inoue, Aichi; et al.

no journal, , 

Oral presentation

Single-mode PMMA waveguides for the 1.5-$$mu$$m wavelength range fabricated by proton beam writing

Miura, Kenta*; Machida, Yuki*; Uehara, Masato*; Hanaizumi, Osamu*; Ishii, Yasuyuki; Sato, Takahiro; Takano, Katsuyoshi; Okubo, Takeru; Yamazaki, Akiyoshi; Inoue, Aichi; et al.

no journal, , 

no abstracts in English

Oral presentation

Fabrication of PMMA waveguides for the 1.5-$$mu$$-wavelength range by using proton beam writing, 2

Miura, Kenta*; Machida, Yuki*; Uehara, Masato*; Hanaizumi, Osamu*; Ishii, Yasuyuki; Sato, Takahiro; Takano, Katsuyoshi; Okubo, Takeru; Yamazaki, Akiyoshi; Inoue, Aichi; et al.

no journal, , 

no abstracts in English

Oral presentation

Sulfate complexation of element 104, Rf, in H$$_{2}$$SO$$_{4}$$/HNO$$_{3}$$ mixed solution ([H$$^{+}$$] = 1.0 M)

Li, Z.; Toyoshima, Atsushi; Asai, Masato; Tsukada, Kazuaki; Sato, Tetsuya; Sato, Nozomi; Kikuchi, Takahiro; Sch$"a$del, M.*; Nagame, Yuichiro; Liang, X. H.*; et al.

no journal, , 

Cation-exchange behavior of $$^{261}$$Rf (T$$_{1/2}$$ = 78 s) produced in the $$^{248}$$Cm($$^{18}$$O, 5n) reaction was studied on a "one-atom-at-a-time" scale in H$$_{2}$$SO$$_{4}$$ (0.15-0.69 M)/HNO$$_{3}$$ mixed solutions ([H$$^{+}$$] = 1.0 M) using an automated ion-exchange separation apparatus coupled with the detection system for alpha-spectroscopy. It was found that adsorption probability (%ads) of $$^{261}$$Rf on cation-exchange resin decreases with increasing [HSO$$_{4}$$$$^{-}$$], showing a successive formation of its sulfate complexes. Rf exhibited much weaker formation of the complexes than the lighter homologues Zr and Hf, which is qualitatively in good agreement with theoretical calculations including relativistic effects.

Oral presentation

Cation-exchange behavior of element 104, Rf, in H$$_{2}$$SO$$_{4}$$/HNO$$_{3}$$ mixed solution ([H$$^{+}$$] = 1.0 M)

Li, Z.; Toyoshima, Atsushi; Asai, Masato; Tsukada, Kazuaki; Sato, Tetsuya; Sato, Nozomi; Sch$"a$del, M.*; Nagame, Yuichiro; Liang, X. H.*; Kasamatsu, Yoshitaka*; et al.

no journal, , 

Cation-exchange behavior of $$^{261}$$Rf (T$$_{1/2}$$ = 78 s) produced in the $$^{248}$$Cm($$^{18}$$O,5n) reaction was studied on a "one-atom-at-a-time" scale in 0.15-0.69 M H$$_{2}$$SO$$_{4}$$/HNO$$_{3}$$ mixed solutions ([H$$^{+}$$] = 1.0 M) using an automated ion-exchange separation apparatus coupled with a detection system for alpha-spectroscopy (AIDA). It was found that adsorption probabilities (%ads) of Rf on the cation-exchange resin decrease with increasing [HSO$$_{4}$$$$^{-}$$], showing successive formation of Rf sulfate complexes. Rf exhibits a weaker complex formation than the lighter homologues Zr and Hf.

Oral presentation

Fundamental study of fabrication of a light waveguide using proton beam writing

Miura, Kenta*; Sato, Takahiro; Koka, Masashi; Ishii, Yasuyuki; Takano, Katsuyoshi; Kada, Wataru; Yamazaki, Akiyoshi; Yokoyama, Akihito; Kamiya, Tomihiro; Uehara, Masato*; et al.

no journal, , 

no abstracts in English

Oral presentation

Fabrication of PMMA film waveguides utilizing proton beam writing

Miura, Kenta*; Sato, Takahiro; Ishii, Yasuyuki; Koka, Masashi; Machida, Yuki*; Uehara, Masato*; Kiryu, Hiromu*; Takano, Katsuyoshi*; Okubo, Takeru; Yamazaki, Akiyoshi; et al.

no journal, , 

Oral presentation

Measurement of the free surface geometry on a curved open channel using color coding method

Ito, Takahiro*; Yamashita, Masatoshi*; Nishikawa, Masato*; Tsuji, Yoshiyuki*; Wakai, Eiichi; Kondo, Hiroo; Kanemura, Takuji; Nakaniwa, Koichi

no journal, , 

no abstracts in English

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