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Shiga, Hideaki*; Taki, Junichi*; Washiyama, Koshin*; Yamamoto, Jumpei*; Kinase, Sakae; Okuda, Koichi*; Kinuya, Seigo*; Watanabe, Naoto*; Tonami, Hisao*; Koshida, Kichiro*; et al.
PLOS ONE (Internet), 8(2), p.e57671_1 - e57671_8, 2013/02
Times Cited Count：18 Percentile：68.67(Multidisciplinary Sciences)Shiraishi, Junya; Yoshida, Zensho*; Furukawa, Masaru*
Astrophysical Journal, 697(1), p.100 - 105, 2009/03
Times Cited Count：5 Percentile：17.83(Astronomy & Astrophysics)A thin disk accompanied by spindle-like jet, created commonly near massive central objects, exhibits a topologically singular aspect when viewed from an ideal macroscopic theory. The accreting inflow and jet's outflow are "singular perturbation" on the ambient Keplerian rotation, which are generated by some non-ideal higher-order (in the order of derivatives) effect. The Hall effect can generate such a structure in a weakly ionized plasma of a protostellar disk. Numerical estimate of the characteristic length scale defined by the singular perturbation justifies the precedence of the Hall effect.
Sn; Evidence for anisotropic 
-wave pairingKadono, Ryosuke*; Sato, Koki*; Koda, Akihiro*; Nagata, Takashi*; Furukawa, Hazuki*; Suzuki, Junichi; Matsuda, Masaaki; Oishi, Kazuki; Higemoto, Wataru; Kuroiwa, Sogo*; et al.
Physical Review B, 74(2), p.024513_1 - 024513_5, 2006/07
Times Cited Count：10 Percentile：44.47(Materials Science, Multidisciplinary)The response of vortex state to the magnetic field in NbSn is probed using muon spin rotation and small-angle neutron scattering. A transformation of vortex structure between hexagonal and squared lattice is observed over a relatively low field range of 2-3T. The gradual increase of the magnetic penetration depth with increasing field provides microscopic evidence for anisotropic (or multigapped) -wave pairing suggested by the Raman scattering experiment. This result renders need for careful examination on the difference of electronic properties between NbSn and VSi.
F-labeled water movement in a cowpea plant by positron emitting tracer imaging system (PETIS)Furukawa, Jun*; Yokota, Harumi*; Tanoi, Keitaro*; Ueoka, Shiori*; Matsuhashi, Shimpei; Ishioka, Noriko; Watanabe, Satoshi; Uchida, Hiroshi*; Tsuji, Atsunori*; Ito, Takehito*; et al.
Journal of Radioanalytical and Nuclear Chemistry, 249(2), p.495 - 498, 2001/08
Times Cited Count：16 Percentile：73.21(Chemistry, Analytical)We present real time Vanadate (V
) uptake imaging in a cowpea plant by Positron Emitting Tracer Imaging System (PETIS). Vanadium-48 was produced by bombarding a Sc foil target with 50 MeV 
-particles at Takasaki Ion accelerators for Advanced Radiation Application (TIARA) AVF cyclotron. Then 
V was added to the culture solution to investigate the V distribution in a cowpea plant. The real time uptake of the V was monitored by PETIS. We measured the distribution of V in a whole plant after 3, 6 and 20 hours of V treatment by Bio-imaging Analyzer System (BAS). After the 20 hour treatment, vanadate was detected at the up-ground part of the plant. To know the effect of V uptake on plant activity, F-labeled water uptake was analyzed by PETIS. When a cowpea plant was treated with V for 20 hours before F-labeled water uptake experiment, the total amount of F-labeled water absorption was drastically desreased. Results suggest the inhibition of water uptake was mainly caused by the vanadate already moved to the up-ground part of the plant.
O-labeled and F-labeled water uptake in a soybean plant by PETIS (Positron Emitting Tracer Imaging System)Nakanishi, Tomoko*; Yokota, Harumi*; Tanoi, Keitaro*; Ikeue, Natsuko*; Okuni, Yoko*; Furukawa, Jun*; Ishioka, Noriko; Watanabe, Satoshi; Osa, Akihiko; Sekine, Toshiaki; et al.
Radioisotopes, 50(6), p.265 - 269, 2001/06
O-Labeled and F-Labeled water uptake manner in a soybean plant was compared by PETIS (Positron Emitting Tracer Imaging System). O-Labeled water (half-life: 2 min) and F-Labeled water (half-life: 110 min) were produced by a cyclotron by 
N(d,n)O and 
O(,pn)F reactions, respectively. A root of a soybean plant was cut off and each labeled water was supplied from the basal part of the plant. The gamma-rays emitted from the sample was measured by a BGO counter with a detection area of 5 cm
15 cm. The radioactivity from each stem was accumlated every 15 s till 20 min. It was found that F-labeled water was taken up much faster than O-labeled water, suggesting that in F-labeled water, fluorine was moved in the form of F-ion. When BAS image of O-labeled water in a plant after 5 min and 10 min of water supply was taken, it was found that the labeled water was observed only in the lowest internode, between a root and the first leaves.
Furukawa, Jun*; Nakanishi, Tomoko*; Matsubayashi, Masahito
Kashika Joho Gakkai-Shi, 20(suppl.1), p.377 - 380, 2000/07
no abstracts in English
Nakanishi, Tomoko*; Furukawa, Jun*; Matsubayashi, Masahito
Nuclear Instruments and Methods in Physics Research A, 424(1), p.136 - 141, 1999/00
Times Cited Count：16 Percentile：74.07(Instruments & Instrumentation)no abstracts in English
Furukawa, Jun*; Nakanishi, Tomoko*; Matsubayashi, Masahito
Nuclear Instruments and Methods in Physics Research A, 424(1), p.116 - 121, 1999/00
Times Cited Count：19 Percentile：77.26(Instruments & Instrumentation)no abstracts in English
Omori, Yoshikazu; Kurihara, Kenichi; Matsukawa, Makoto; Terakado, Tsunehisa; Okano, Jun; Furukawa, Hiroshi
no journal, ,
no abstracts in English
Shimada, Katsuhiro; Terakado, Tsunehisa; Omori, Yoshikazu; Okano, Jun; Furukawa, Hiroshi; Shibata, Kazuyuki; Terakado, Hiroyuki; Shibata, Takatoshi; Matsukawa, Makoto; Kurihara, Kenichi
no journal, ,
no abstracts in English
Furukawa, Jun*; Iwata, Yoshiaki*; Suzui, Nobuo; Ishii, Satomi; Kawachi, Naoki; Yamazaki, Haruaki; Fujimaki, Shu; Sato, Shinobu*
no journal, ,
no abstracts in English
Furukawa, Jun*; Yamamoto, Tsuyoshi*; Noda, Koki*; Sato, Shinobu*; Koka, Masashi; Yamada, Naoto; Kitamura, Akane; Sato, Takahiro; Yokoyama, Akihito; Okubo, Takeru; et al.
no journal, ,
no abstracts in English
Miwa, Shuhei; Nakajima, Kunihisa; Di Lemma, F. G.; Suzuki, Chikashi; Yamashita, Shinichiro; Okane, Tetsuo; Takai, Toshihide; Takada, Juntaro; Furukawa, Tomohiro; Osaka, Masahiko
no journal, ,
JAEA conducts a fundamental research on fission product (FP) chemistry to construct the database of FP chemistry at each stage of nuclear power plants and improve FP chemistry models which will be reflected to the improvement of FP release and transport models. Main target of FP elements are Cs and I, and the evaluation of FP and B release kinetics, development of direct measurement technique of FP chemical form, the evaluation of Cs chemisorption behavior to SS, upgrading the thermodynamic database are carried out with focuses on Mo and BWR control material, boron carbide (B
C).
Takai, Toshihide; Takada, Juntaro; Nakajima, Kunihisa; Furukawa, Tomohiro; Osaka, Masahiko
no journal, ,
Fundamental knowledge of the characteristics of the Cs-chemisorbed deposits was important for decommissioning of the Fukushima-Daiichi Nuclear Power Plant (1F). Some important information was obtained from foregoing experiments results. Nevertheless, it was not enough for covering 1F accident conditions. Purpose of this study was to confirm the Cs-chemisorption mechanism in a wider range of temperature and atmosphere. Synthesis results of Cesium silicates, which was expected to form under a severe accident, was described in this presentation.
Takai, Toshihide; Hirakawa, Yasushi; Kurihara, Akikazu; Saito, Junichi; Furukawa, Tomohiro
no journal, ,
Low pressure-proof structure design was achievable in fast reactor plant because of high melting point and heat transfer performance of sodium coolant. Other hand, countermeasure for sodium leak incident is required, as sodium had high chemical activity. For improving safety margins during a severe accident, elemental experiment for suppressing combustion and corrosion influence was carried out.
Furukawa, Tomohiro; Takai, Toshihide; Hirakawa, Yasushi; Kurihara, Akikazu; Saito, Junichi
no journal, ,
We planned the research outline about the safety improvement of the fast reactor focusing on sodium chemistry, towards the influence reduction at the sodium leak incident. This paper describes the outline and the test results of combustion/corrosion inhibition.
Yamano, Hidemasa; Takai, Toshihide; Furukawa, Tomohiro; Saito, Junichi; Kikuchi, Shin; Emura, Yuki; Higashi, Hideo*; Fukuyama, Hiroyuki*; Nishi, Tsuyoshi*; Ota, Hiromichi*; et al.
no journal, ,
It is necessary to simulate a eutectic melting reaction and relocation behavior of boron carbide (BC) as a control rod material and stainless steel (SS) during a core disruptive accident in an advanced sodium-cooled fast reactor designed in Japan. On that account, a new project has been started to conduct eutectic melting experiments, thermophysical property measurement of the eutectic melt, and physical model development for the eutectic melting reaction. The eutectic experiments involve the visualization experiments, eutectic reaction rate experiments and material analyses. The thermophysical properties are measured in the range of liquid and solid states. The physical model is developed for a severe accident computer code based on the measured data of the eutectic reaction rate and the physical properties. This paper describes the project overview and progress by JFY2017.
