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JAEA Reports

Deuterated Materials Enhancing Neutron Science for Structure Function Applications; October 19th-20th, 2017, Ibaraki Quantum Beam Research Center

Akutsu, Kazuhiro*; Adachi, Motoyasu*; Kawakita, Yukinobu

JAEA-Review 2018-002, 36 Pages, 2018/03

JAEA-Review-2018-002.pdf:4.67MB

Since J-PARC started operation for user programs with high-intensity pulsed neutron beams, many material and life science studies have been carried out at J-PARC. Since partial or complete deuteration of organic compounds for contrast variation in the scattering length densities of materials is one of the most effective techniques in the application of neutron scattering analysis, deuterated materials have led to significant progress in our understanding of the structure of novel organic materials. Aiming at accelerating development of deuteration activities in our country, an international workshop "Deuterated Materials Enhancing Neutron Science for Structure Function Applications" was held as a J-PARC Workshop at Ibaraki Quantum Beam Research Center from 19th October to 20th October in 2017. In this workshop, the chemical/biological deuteration activities and recent scientific results of deuterated materials enhancing neutron study in Japan and other countries were discussed by domestic/foreign deuteration and neutron scientists. This is a report of the workshop summarized by organizers.

Journal Articles

Selective OD bond dissociation of HOD; Photodissociation of vibrationally excited HOD in the 5$$nu$$$$_{OD}$$ state

Akagi, Hiroshi; Fukazawa, Hiroshi; Yokoyama, Keiichi; Yokoyama, Atsushi

Journal of Chemical Physics, 123(18), p.184305_1 - 184305_7, 2005/11

 Times Cited Count:20 Percentile:39.66(Chemistry, Physical)

Vibrationally excited HOD in the fourth overtone state of the OD-stretching mode (5$$nu$$$$_{OD}$$) has been photodissociated by ultraviolet photolysis at ca. 243.1 nm. Branching ratio between the OH- and OD-bond dissociation channels has been determined by detecting the H and D atoms. The OD-bond dissociation is the dominant channel, with the yield of H atom generated by the photolysis being below the detection limit.

Journal Articles

Comparison of tritium retention and carbon deposition in JET and JT-60U

Tanabe, Tetsuo*; Sugiyama, Kazuyoshi*; Coad, P.*; Bekris, N.*; Glugla, M.*; Miya, Naoyuki

Journal of Nuclear Materials, 345(2-3), p.89 - 95, 2005/10

 Times Cited Count:15 Percentile:25.07(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Gas release of SiC implanted with deuterium or helium

Aihara, Jun; Sawa, Kazuhiro; Furuya, Yoshio*; Hojo, Tomohiro*; Furuno, Shigemi*; Yamamoto, Hiroyuki; Hojo, Kiichi; Ishihara, Masahiro

Journal of the American Ceramic Society, 88(8), p.2319 - 2321, 2005/08

 Times Cited Count:0 Percentile:100(Materials Science, Ceramics)

no abstracts in English

Journal Articles

Local bonding states of ion-irradiated graphite characterized by photon-stimulated desorption (PSD) spectroscopy

Sekiguchi, Tetsuhiro; Baba, Yuji; Shimoyama, Iwao; Nath, K. G.

Journal of Electron Spectroscopy and Related Phenomena, 144-147, p.437 - 441, 2005/06

 Times Cited Count:3 Percentile:80.45(Spectroscopy)

no abstracts in English

Journal Articles

Exhaust gas monitoring device of nuclear fusion experimental device

Kaminaga, Atsushi; Nakamura, Hirofumi; Isobe, Kanetsugu; Arai, Takashi

Heisei-16-Nendo Osaka Daigaku Sogo Gijutsu Kenkyukai Hokokushu (CD-ROM), 4 Pages, 2005/03

no abstracts in English

Journal Articles

Retention characteristics of hydrogen isotopes in JT-60U

Masaki, Kei; Sugiyama, Kazuyoshi*; Hayashi, Takao; Ochiai, Kentaro; Goto, Yoshitaka*; Shibahara, Takahiro*; Hirohata, Yuko*; Oya, Yasuhisa*; Miya, Naoyuki; Tanabe, Tetsuo*

Journal of Nuclear Materials, 337-339, p.553 - 559, 2005/03

 Times Cited Count:26 Percentile:12.03(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Isotope hydrograph separation for modeling of runoff mechanisms of atmospherically derived chemical and radioactive pollutants

Matsunaga, Takeshi; Yanase, Nobuyuki; Hanzawa, Yukiko; Tsuzuki, Katsunori; Naganawa, Hirochika

Journal of Water and Environment Technology (Internet), 3(2), p.243 - 252, 2005/00

In a tributary watershed of the Kuji River of Japan, the hydrological components of runoff associated with a rain storm event were investigated using isotope tracers of hydrogen ($$^{2}$$H) and oxygen ($$^{18}$$O) in precipitations and stream water. The runoff was separated into either "old water" (pre-existing in the ground before the storm) and "new water"(from the storm precipitation). It was found that the discharge of several hazardous trace elements (Sb, Cu, Cr) was largely (24-54%) attributable to that of the new water in spite of its small contribution to the total water discharge. These investigations suggest that the new water may play an important role in the migration of atmospherically derived, hazardous trace elements to streams during rain storms.

Journal Articles

Energetic neutral particle measurement with natural diamond detector in JT-60U

Kusama, Yoshinori; Ishikawa, Masao; Takechi, Manabu; Nishitani, Takeo; Morioka, Atsuhiko; Sasao, Mamiko*; Isobe, Mitsutaka*; Krasilnikov, A.*; Kaschuck, Y.*

Proceedings of Plasma Science Symposium 2005/22nd Symposium on Plasma Processing (PSS-2005/SPP-22), p.395 - 396, 2005/00

The energetic neutral particles have been successfully measured with a natural diamond detector in the neutron and $$gamma$$ ray radiation circumstance of the JT-60U deuterium discharges. The diamond detector was covered with polyethylene and lead in order to reduce the neutron and $$gamma$$ ray background. The shield has shown expected shielding capability. A rapid increase in neutral particles has been observed at the onset of the Toroidal Alfven Eigenmode (TAE) excited by the negative-ion-based neutral beam injection. The energy range of increased neutral particles has agreed well with that predicted from the resonant interaction between the energetic ions and the TAE.

Journal Articles

Conformational changes of troponin C within the thin filaments detected by neutron scattering

Matsumoto, Fumiko*; Makino, Koji*; Maeda, Kayo*; Patzelt, H.*; Maeda, Yuichiro*; Fujiwara, Satoru

Journal of Molecular Biology, 342(4), p.1209 - 1221, 2004/09

 Times Cited Count:17 Percentile:69.57(Biochemistry & Molecular Biology)

Regulation of skeletal and cardiac muscle contraction is associated with the thin filament-based proteins, troponin C (TnC), TnI, TnT, tropomyosin, and actin. Knowledge of ${it in situ}$ structures of these proteins is indispensable for elucidating the molecular mechanism of this Ca$$^{2+}$$-sensitive regulation. Here the structure of TnC within the thin filaments was investigated with neutron scattering, combined with selective deuteration and the contrast matching technique. Deuterated TnC was prepared, reconstituted into the native thin filaments, and neutron scattering patterns of these reconstituted thin filaments containing deuterated TnC were measured under the condition where non-deuterated components were rendered 'invisible' to neutrons. The obtained scattering curves arising only from deuterated TnC were analyzed by model calculations using the Monte Carlo method. The results showed that upon binding of Ca$$^{2+}$$, ${it in situ}$ radius of gyration of TnC changed from 23 AA to 24 AA , and the radial position of TnC within the thin filament changed from 53 AA to 49 AA .

Journal Articles

Impurity release and deuterium retention properties of a ferritic steel wall in JFT-2M

Ogawa, Hiroaki; Yamauchi, Yuji*; Tsuzuki, Kazuhiro; Kawashima, Hisato; Sato, Masayasu; Shinohara, Koji; Kamiya, Kensaku; Kasai, Satoshi; Kusama, Yoshinori; Yamaguchi, Kaoru*; et al.

Journal of Nuclear Materials, 329-333(Part1), p.678 - 682, 2004/08

 Times Cited Count:4 Percentile:66.69(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Deuterium retention properties of Be$$_{12}$$Ti

Iwakiri, Hirotomo*; Yoshida, Naoaki*; Uchida, Munenori*; Kawamura, Hiroshi

JAERI-Conf 2004-006, p.220 - 224, 2004/03

no abstracts in English

Journal Articles

Bond-selective photodissociation of partially deuterated ammonia molecules; Photodissociations of vibrationally excited NHD$$_{2}$$ in the 5$$nu$$$$_{NH}$$ state and NH$$_{2}$$D in the 5$$nu$$$$_{ND}$$ state

Akagi, Hiroshi; Yokoyama, Keiichi; Yokoyama, Atsushi

Journal of Chemical Physics, 120(10), p.4696 - 4704, 2004/03

 Times Cited Count:19 Percentile:42.57(Chemistry, Physical)

no abstracts in English

Journal Articles

Thermal desorption of deuterium from ion irradiated Be$$_{12}$$Ti

Iwakiri, Hirotomo*; Yasunaga, Kazufumi*; Yoshida, Naoaki*; Uchida, Munenori*; Kawamura, Hiroshi

Journal of Nuclear Materials, 329-333(Part A), p.880 - 884, 2004/00

 Times Cited Count:7 Percentile:50.38(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Tritium permeation study through tungsten and nickel using pure tritium ion beam

Nakamura, Hirofumi; Shu, Wataru; Hayashi, Takumi; Nishi, Masataka

Journal of Nuclear Materials, 313-316(1-3), p.679 - 684, 2003/03

 Times Cited Count:14 Percentile:28.39

no abstracts in English

Journal Articles

Study on deuterium permeation through copper and F82H low activation steel by ion implantation

Nakamura, Hirofumi; Shu, Wataru; Hayashi, Takumi; Ohira, Shigeru; Nishi, Masataka

Fusion Science and Technology, 41(3), p.887 - 891, 2002/05

no abstracts in English

Journal Articles

Development of electrochemical hydrogen pump under vacuum condition for a compact tritium gas cycling system

Kato, Mineo; Ito, Takeshi*; Sugai, Hiroyuki; Kawamura, Yoshinori; Hayashi, Takumi; Nishi, Masataka; Tanase, Masakazu; Matsuzaki, Teiichiro*; Ishida, Katsuhiko*; Nagamine, Kanetada*

Fusion Science and Technology, 41(3), p.859 - 862, 2002/05

JAERI has a plane to develop a compact tritium gas recycling system for fusion research. This system is also very attractive for the muon-catalyzed fusion ($$mu$$CF) research at RIKEN-RAL Muon Facility in UK. For the research, JAERI has produced high purity tritium gas of 1,500 Ci and transported it to the Facility. In the $$mu$$CF experiments, the tritium gas was diluted by the deuterium in an optional concentration and the used tritium gas was carried back by the tritium transport container developed to JAERI. If it is possible to recycle the diluted tritium gas, i.e., the used tritium gas is enriched in the experimental site, the $$mu$$CF experiments should be conducted efficiently. rom the above point of view, in this paper, we propose the compact tritium gas recycling system based on the gas chromatography that has already developed in JAERI and a proton conductor.

Journal Articles

High energy ions and nuclear fusion in laser-cluster interaction

Kishimoto, Yasuaki; Masaki, Tomohiro*; Tajima, Toshiki*

Physics of Plasmas, 9(2), p.589 - 601, 2002/02

 Times Cited Count:80 Percentile:7.28(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Laser-cluster interaction for nuclear fusion

Kishimoto, Yasuaki; Masaki, Tomohiro*; Tajima, Toshiki*

AIP Conference Proceedings 611, p.264 - 275, 2002/00

no abstracts in English

Journal Articles

Boronization using deuterated-decaborane in JT-60U

Yagyu, Junichi; Arai, Takashi; Kaminaga, Atsushi; Kizu, Kaname; Arai, Masaru*; Miya, Naoyuki

Proceedings of 19th IEEE/NPSS Symposium on Fusion Engineering (SOFE), p.388 - 391, 2002/00

no abstracts in English

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