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Journal Articles

Horizontal line nodes in Sr$$_2$$RuO$$_4$$ proved by spin resonance

Iida, Kazuki*; Kofu, Maiko; Suzuki, Katsuhiro*; Murai, Naoki; Kawamura, Seiko; Kajimoto, Ryoichi; Inamura, Yasuhiro; Ishikado, Motoyuki*; Hasegawa, Shunsuke*; Masuda, Takatsugu*; et al.

Journal of the Physical Society of Japan, 89(5), p.053702_1 - 053702_5, 2020/05

 Times Cited Count:8 Percentile:87.06(Physics, Multidisciplinary)

Journal Articles

Al-impurity-induced magnetic excitations in heavily over-doped La$$_{1.7}$$Sr$$_{0.3}$$Cu$$_{0.95}$$Al$$_{0.05}$$O$$_{4}$$

Ikeuchi, Kazuhiko*; Nakajima, Kenji; Kawamura, Seiko; Kajimoto, Ryoichi; Wakimoto, Shuichi; Suzuki, Kensuke*; Fujita, Masaki*

AIP Advances (Internet), 8(10), p.101318_1 - 101318_5, 2018/10

 Times Cited Count:0 Percentile:0(Nanoscience & Nanotechnology)

By means of inelastic neutron scattering, we measured magnetic excitations in a sizable single crystal of La$$_{1.7}$$Sr$$_{0.3}$$Cu$$_{0.95}$$Al$$_{0.05}$$O$$_{4}$$, which is an Al-substituted system of the heavily hole-doped cuprate system La$$_{2-x}$$Sr$$_{x}$$CuO$$_{4}$$ with an effective concentration of holes of $$X_{rm eff}$$ = 0.25.

Journal Articles

Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex, 2; Neutron scattering instruments

Nakajima, Kenji; Kawakita, Yukinobu; Ito, Shinichi*; Abe, Jun*; Aizawa, Kazuya; Aoki, Hiroyuki; Endo, Hitoshi*; Fujita, Masaki*; Funakoshi, Kenichi*; Gong, W.*; et al.

Quantum Beam Science (Internet), 1(3), p.9_1 - 9_59, 2017/12

The neutron instruments suite, installed at the spallation neutron source of the Materials and Life Science Experimental Facility (MLF) at the Japan Proton Accelerator Research Complex (J-PARC), is reviewed. MLF has 23 neutron beam ports and 21 instruments are in operation for user programs or are under commissioning. A unique and challenging instrumental suite in MLF has been realized via combination of a high-performance neutron source, optimized for neutron scattering, and unique instruments using cutting-edge technologies. All instruments are/will serve in world-leading investigations in a broad range of fields, from fundamental physics to industrial applications. In this review, overviews, characteristic features, and typical applications of the individual instruments are mentioned.

Journal Articles

Materials and Life Science Experimental Facility at the Japan Proton Accelerator Research Complex, 3; Neutron devices and computational and sample environments

Sakasai, Kaoru; Sato, Setsuo*; Seya, Tomohiro*; Nakamura, Tatsuya; To, Kentaro; Yamagishi, Hideshi*; Soyama, Kazuhiko; Yamazaki, Dai; Maruyama, Ryuji; Oku, Takayuki; et al.

Quantum Beam Science (Internet), 1(2), p.10_1 - 10_35, 2017/09

Neutron devices such as neutron detectors, optical devices including supermirror devices and $$^{3}$$He neutron spin filters, and choppers are successfully developed and installed at the Materials Life Science Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC), Tokai, Japan. Four software components of MLF computational environment, instrument control, data acquisition, data analysis, and a database, have been developed and equipped at MLF. MLF also provides a wide variety of sample environment options including high and low temperatures, high magnetic fields, and high pressures. This paper describes the current status of neutron devices, computational and sample environments at MLF.

Journal Articles

Advanced-ORIENT cycle project; Summary of phase I fundamental studies

Koyama, Shinichi; Suzuki, Tatsuya*; Ozawa, Masaki*; Kurosawa, Kiyoko*; Fujita, Reiko*; Mimura, Hitoshi*; Okada, Ken*; Morita, Yasuji; Fujii, Yasuhiko*

Procedia Chemistry, 7, p.222 - 230, 2012/00

 Times Cited Count:1 Percentile:60.25

Adv.-ORIENT cycle strategy has been proposed as a basic concept for trinitarian research on separation, transmutation and utilization of nuclides and elements based on FBR fuel cycle. Validation of principal separation method and related safety research were performed from 2006 through 2011 as Phase I program. First, more than 90% of Cs could be recovered from the actual spent fuel [IXC(I) step]. The next is the adsorption of the platinum group metals (PGM), lanthanides, Am and Cm were separated by using a tertiary pyridine-type resin (TPR) as ion exchange steps [IXC(II, III, IV) steps]. The separated PGM metals will be supplied to the electrochemical extraction [CEE step]. As experiment for safety issues, Hastelloy-B at RT and Ta at 90$$^{circ}$$C were confirmed their anti-corrosive in highly concentrated HCl media. Thermo-chemical stability for TPR was verified. Issues to be solved for next phase based on the final results of phase I program.

Journal Articles

Advanced-ORIENT cycle, its scientific progress and prospect for engineering feasibility

Koyama, Shinichi; Yamagishi, Isao; Suzuki, Tatsuya*; Ozawa, Masaki*; Fujita, Reiko*; Okada, Ken*; Tatenuma, Katsuyoshi*; Mimura, Hitoshi*; Fujii, Yasuhiko

Proceedings of International Conference on Toward and Over the Fukushima Daiichi Accident (GLOBAL 2011) (CD-ROM), 8 Pages, 2011/12

Effective separation of MA and LLFP, transmutation and utilization were the main directions of Advanced OREINT Cycle project. Study for each integrant technology was concluded as first trial of the project. TPR enabled to separate MA/Ln and then Am/Cm precisely from spent fuel in HCl and HNO$$_{3}$$ media. CEE method could separate the light PGM and Tc by HCl media. Recovery of Cs from simulated HLLW coul be achieved more than 90 %. In addition, the perspective for next phase was proposed.

Journal Articles

Current status and future plans of advanced ORIENT cycle strategy

Koyama, Shinichi; Suzuki, Tatsuya*; Mimura, Hitoshi*; Fujita, Reiko*; Kurosawa, Kiyoko*; Okada, Ken*; Ozawa, Masaki

Progress in Nuclear Energy, 53(7), p.980 - 987, 2011/09

 Times Cited Count:5 Percentile:42.62(Nuclear Science & Technology)

Individual basic researches of separation step were performed in the Advanced ORIENT Cycle project. High separation selectivity for Cs and Sr by novel nano adsorbents AMP-SG (D) and D18C6-MC were confirmed, respectively. TPR well adsorbed Pd and Tc in dilute HCl condition. Formation of rare metal fission product RMFP-deposit Pt electrodes from SHLLW was verified, and it was confirmed that high catalytic reactivity on electrolytic production of hydrogen. As experiment for engineering feasibility, Hastelloy-B at RT and Ta at 90$$^{circ}$$C were confirmed their anti-corrosive in highly concentrated HCl media. Thermo-chemical stability for TPR was verified in either HCl or HNO$$_{3}$$ media toward its practical use in the separation process. Issues to be solved for optimization based on the results of lab-scale experiment have revealed in this study.

Journal Articles

Opinion of young researchers about implementation of new ICRP recommendation in domestic laws

Ogino, Haruyuki*; Kono, Takahiko; Yamasoto, Kotaro; Fujiwara, Keiko*; Suzuki, Chihiro*

Nihon Genshiryoku Gakkai-Shi ATOMO$$Sigma$$, 52(8), p.458 - 461, 2010/08

no abstracts in English

Journal Articles

Adv.-ORIENT cycle; Its scientific progress and the engineering feasibility

Ozawa, Masaki; Suzuki, Tatsuya*; Koyama, Shinichi; Yamagishi, Isao; Fujita, Reiko*; Okada, Ken*; Tatenuma, Katsuyoshi*; Mimura, Hitoshi*; Fujii, Yasuhiko*

Proceedings of International Conference on Advanced Nuclear Fuel Cycle; Sustainable Options & Industrial Perspectives (Global 2009) (CD-ROM), p.1117 - 1126, 2009/09

Journal Articles

Targeted heavy-ion microbeam irradiation of the embryo but not yolk in the diapause-terminated egg of the silkworm, ${it Bombyx mori}$, induces the somatic mutation

Furusawa, Toshiharu*; Fukamoto, Kana*; Sakashita, Tetsuya; Suzuki, Eiko*; Kakizaki, Takehiko*; Hamada, Nobuyuki*; Funayama, Tomoo; Suzuki, Hiromi*; Ishioka, Noriaki*; Wada, Seiichi*; et al.

Journal of Radiation Research, 50(4), p.371 - 375, 2009/07

 Times Cited Count:8 Percentile:32.37(Biology)

Using heavy-ion microbeam, we report target irradiation of selected compartments within the diapause-terminated egg and its mutational consequences in the silkworm, ${it Bombyx mori}$. On one hand, carbon-ion exposure of embryo to 0.5 - 6 Gy increased the somatic mutation frequency, suggesting targeted radiation effects. On the other, such increases were not observed when yolk was targeted, suggesting a lack of nontargeted bystander effect.

Journal Articles

Influence of local irradiation with heavy-ion microbeam on the incidence of somatic mutation arising on the larvae in embryo and yolk in the egg of the silkworm, ${it Bombyx mori}$

Furusawa, Toshiharu*; Suzuki, Eiko*; Nagaoka, Shunji*; Suzuki, Hiromi*; Ishioka, Noriaki*; Hamada, Nobuyuki*; Wada, Seiichi*; Kobayashi, Yasuhiko; Sakashita, Tetsuya; Kakizaki, Takehiko*; et al.

JAEA-Review 2007-060, JAEA Takasaki Annual Report 2006, P. 115, 2008/03

Using heavy ion microbeam, we investigated the somatic mutation arising on the larvae in embyro and yolk in the egg of silkworm, ${it Bombyx mori}$. The incidence of the somatic mutation was 12%, and the same level of mutation following the microbeam irradiation at the center of the egg. However, the microbeam irradiation to the abdomen of the silkworm larvae induced the increase of somatic mutation, 63% (3 Gy) and 80% (6 Gy).

Journal Articles

The H-Invitational Database (H-InvDB); A Comprehensive annotation resource for human genes and transcripts

Yamasaki, Chisato*; Murakami, Katsuhiko*; Fujii, Yasuyuki*; Sato, Yoshiharu*; Harada, Erimi*; Takeda, Junichi*; Taniya, Takayuki*; Sakate, Ryuichi*; Kikugawa, Shingo*; Shimada, Makoto*; et al.

Nucleic Acids Research, 36(Database), p.D793 - D799, 2008/01

 Times Cited Count:51 Percentile:74.53(Biochemistry & Molecular Biology)

Here we report the new features and improvements in our latest release of the H-Invitational Database, a comprehensive annotation resource for human genes and transcripts. H-InvDB, originally developed as an integrated database of the human transcriptome based on extensive annotation of large sets of fulllength cDNA (FLcDNA) clones, now provides annotation for 120 558 human mRNAs extracted from the International Nucleotide Sequence Databases (INSD), in addition to 54 978 human FLcDNAs, in the latest release H-InvDB. We mapped those human transcripts onto the human genome sequences (NCBI build 36.1) and determined 34 699 human gene clusters, which could define 34 057 protein-coding and 642 non-protein-coding loci; 858 transcribed loci overlapped with predicted pseudogenes.

Journal Articles

Advanced ORIENT cycle, toward realizing intensified transmutation and utilization of radioactive wastes

Ozawa, Masaki; Koyama, Shinichi; Suzuki, Tatsuya*; Fujita, Reiko*; Mimura, Hitoshi*; Fujii, Yasuhiko*

Proceedings of International Conference on Advanced Nuclear Fuel Cycles and Systems (Global 2007) (CD-ROM), p.451 - 457, 2007/09

To minimize the ecological burden originating in nuclear fuel recycling, a new R&D strategy, Adv.-ORIENT (Advanced Optimization by Recycling Instructive ElemeNTs) cycle, was set forth. A key separation tool is ion exchange chromatography (IXC) by a tertiary pyridine resin having soft donor nitrogen atoms. This method has provided individual recovery of pure Am and Cm products with a Pu/U/Np fraction from irradiated fuel in just a 3-step separation. A catalytic electrolytic extraction (CEE) method by Pd$$_{adatom}$$ has been employed to separate, purify and fabricate RMFP catalysts. High separation efficiency of RMFP proved hydrochloric acid as a suitable media for their recovery. Different functioned ion exchangers, e.g., ammonium molybdophosphate (AMP), have been investigated for the separation of Cs$$^{+}$$. Theoretical and laboratory studies on the isotope separation of LLFPs were begun for $$^{79}$$Se, $$^{126}$$Sn and $$^{135}$$Cs.

Journal Articles

The Characteristics of radiation-induced cell responses in the canine spontaneous tumor cells

Sano, Tadashi*; Wada, Seiichi*; Suzuki, Keiko*; Natsuhori, Masahiro*; Kakizaki, Takehiko; Ito, Takashi*; Nakazawa, Konomi*; Kobayashi, Yasuhiko; Ito, Nobuhiko*

JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 115, 2007/02

Journal Articles

Analysis of local irradiation of heavy-ion microbeam influence on embryo or yolk in the silkworm, ${it Bombyx mori}$, egg by the incidence of somatic mutation appearing in the larvae

Furusawa, Toshiharu*; Suzuki, Eiko*; Nagaoka, Shunji*; Suzuki, Hiromi*; Ishioka, Noriaki*; Hamada, Nobuyuki*; Wada, Seiichi*; Kobayashi, Yasuhiko; Sakashita, Tetsuya; Kakizaki, Takehiko; et al.

JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 118, 2007/02

no abstracts in English

Journal Articles

Strategic recycling of fission products in nuclear fuel cycle as for hydrogen production catalyst

Ozawa, Masaki; Fujita, Reiko*; Koyama, Shinichi; Suzuki, Tatsuya*; Fujii, Yasuhiko*

Proceedings of 9th OECD/NEA Information Exchange Meeting on Actinide and Fission Product Partitioning and Transmutation, p.315 - 324, 2007/00

Catalytic Electrolytic extraction method has been studied as a separation tool for rare metal fission products, RMFP in the spent nuclear fuel. In an employed CEE process, Pd$$^{2+}$$ cation itself would not only be easily deposited from various nitric acid solutions, but enhance also the deposition of co-existing RuNO$$^{3+}$$, ReO$$_{4}$$$$^{-}$$ and $$^{99}$$TcO$$_{4}$$$$^{-}$$ by acting as a catalyst. The quaternary-, Pd-Ru-Rh-Re, deposit Pt or Ti electrode, fabricated by CEE, suggested the highest cathodic current corresponding to the hydrogen generation reaction in both alkaline solution and sea water. Advanced ORIENT Cycle, where ion exchange chromatography using tertiary pyridine resin and the CEE employ as mainstay separation technology, will enhance separation and utilization of actinide and fission product, and thus be expected to realize ultimate reducing radioactive wastes.

Journal Articles

SANS study of slow dynamics in concetrated spin glasses

Motoya, Kiyoichiro*; Hioki, Keiko*; Suzuki, Junichi

Journal of the Physical Society of Japan, 70(Suppl.A), p.139 - 141, 2001/05

no abstracts in English

Journal Articles

Inner-shell ionization in high density hot plasma produced by high intensity laser irradiation

Moribayashi, Kengo; Zhidkov, A. J.*; Sasaki, Akira; Sudo, Keiko; Suzuki, Shingo*

Atomic Collision Research in Japan, No.27, p.1 - 3, 2001/00

no abstracts in English

Journal Articles

Short wavelength X-ray emission from inner-shell excited states generated by high intensity laser irradiation on Kr, Xe clusters

Moribayashi, Kengo; Zhidkov, A. G.; Sasaki, Akira; Sudo, Keiko; Suzuki, Shingo*

Proceedings of 2nd International Conference on Inertial Fusion Sciences and Applications (IFSA 2001), p.1182 - 1185, 2001/00

no abstracts in English

Oral presentation

Practical research using the spontaneous neoplasm case of the dog as a particle irradiation treatment model

Sano, Tadashi*; Suzuki, Keiko*; Natsuhori, Masahiro*; Kakizaki, Takehiko; Ito, Nao*; Nakazawa, Konomi*; Ito, Nobuhiko*; Wada, Seiichi*; Kobayashi, Yasuhiko

no journal, , 

no abstracts in English

37 (Records 1-20 displayed on this page)