Search Results 1-20 of 4837

  • Spin Wave Excitations in Honeycomb Antiferromagnet MnTiO3

    Hwang In Yong , Lee Kee Hwan , Chung Jae-Ho , Ikeuchi Kazuhiko , Garlea V. Ovidiu , Yamauchi Hiroki , Akatsu Mitsuhiro , Shamoto Shin-ichi

    Journal of the Physical Society of Japan 90(6), 064708-064708, 2021-06-15

    DOI 

  • Magnetic Excitations of Sr3Ir2O7 Observed by Inelastic Neutron Scattering Technique

    Fujita Masaki , Ikeuchi Kazuhiko , Kajimoto Ryoichi , Nakamura Mitsutaka

    Journal of the Physical Society of Japan 90(2), 025001-025001, 2021-02-15

    DOI 

  • 2021-02-15

    Kurumaji Takashi , Nakajima Taro , Feoktystov Artem , Babcock Earl , Salhi Zahir , Ukleev Victor , Arima Taka-hisa , Kakurai Kazuhisa , Tokura Yoshinori

    Journal of the Physical Society of Japan 90(2), 024705-1-7, 2021-02

    DOI 

  • Monte Carlo perturbation calculation for geometry change in fixed source problems with the perturbation source method

    Yamamoto Toshihiro , Sakamoto Hiroki

    … The perturbation source method (PSM), which is a Monte Carlo perturbation calculation method, is applied to geometry changes in fixed-source neutron transport problems. … The efficiency of the PSM can be enhanced by adding a pseudo-scattering cross section to the perturbed region. … For geometry changes where the perturbed region is small, PSM exhibits excellent performance compared to the two independent runs before and after the perturbation if optimized pseudo-scattering cross sections are used. …

    Progress in Nuclear Energy (132), 2021-02

    IR 

  • Elucidation of the mechanism of subunit exchange in αB crystallin oligomers

    Inoue Rintaro , Sakamaki Yusuke , Takata Takumi , Wood Kathleen , Morishima Ken , Sato Nobuhiro , Okuda Aya , Shimizu Masahiro , Urade Reiko , Fujii Noriko , Sugiyama Masaaki

    … To elucidate the unsettled mechanism of subunit exchange in αB-crystallin oligomers, the study was carried out at two different protein concentrations, 28.5 mg/mL (dense sample) and 0.45 mg/mL (dilute sample), through inverse contrast matching small-angle neutron scattering. …

    Scientific Reports (11), 2021-01-28

    IR 

  • Quasielastic Neutron Scattering for Analyzing Transport Dynamics of Chemically-Bound Hydrogen in Minerals  [in Japanese]

    OKUCHI Takuo

    … <p>We demonstrate that quasielastic neutron scattering is effective for analyzing transport dynamics of chemically-bound hydrogen cations within crystal structures of minerals. …

    Nihon Kessho Gakkaishi 63(2), 129-134, 2021

    J-STAGE 

  • Developments and Applications of Photoresponsive Molecular Assemblies  [in Japanese]

    AKAMATSU Masaaki , SAKAI Kenichi , SAKAI Hideki

    <p>界面活性剤が形成する分子集合体の構造を光刺激により変化させれば,内包した物質の放出制御が可能となり,薬物や有効成分の送達システムが構築できる。本総説では,これまでに筆者らが開発した光応答性界面活性剤について紹介する。アゾベンゼン修飾カチオン性界面活性剤は,紫外光および可視光照射にともなう<i>trans-cis</i>異性化により臨界ミセル濃度が大きく変化 …

    Oleoscience 21(6), 227-234, 2021

    J-STAGE 

  • Design of Self-healing Polymers and High Value-added Urethane-containing Rubber Materials Based on Dynamic Covalent Chemistry  [in Japanese]

    Hideyuki OTSUKA Hideyuki , AOKI Daisuke , SHODA Yasuhiro , TSUNODA Katsuhiko

    … The aggregation structure of deuterated polybutadienes copolymers with different contents of urethane linkages are characterized by small-angle neutron scattering. …

    NIPPON GOMU KYOKAISHI 94(2), 33-38, 2021

    J-STAGE 

  • Experimental study on void detecting characteristics of radioisotope backscattering detector with detectors on both sides of neutron source  [in Japanese]

    Kozu Mineki , Seko Shigeki , Ikenaga Taichi

    … Characteristic permeation, scattering and energy attenuation of neutron rays is an ability to determine the defects. … In this paper, the experimental results of the detecting properties of radioisotope neutron backscattering detector are described. … Moderating to thermal neutron material affects sensitiveness to the relation radioisotope-count and increasing size of concrete or void width. …

    Journal of Structural Engineering, A 67A(0), 687-696, 2021

    J-STAGE 

  • Microscopic View of the Magnon Spin Current―Observation of Magnon Polarization  [in Japanese]

    Nambu Yusuke

    <p>電子のもつ自由度のうち,スピン自由度の活用を目指すスピントロニクスが盛んに研究されている.既に実用化されている電荷の流れである電流に代わり,スピン自由度の流れであるスピン流で駆動する素子を作製できれば,ジュール熱発生によるエネルギー損失が極めて少ない省エネルギー機器を実現できる可能性がある.スピントロニクスではスピン流の生成と制御が重要な課題となっているが,現在はその機構解明とス …

    Butsuri 76(4), 214-219, 2021

    J-STAGE 

  • Unresolved problems of ice polymorphs: approach from high-pressure neutron diffraction studies  [in Japanese]

    KOMATSU Kazuki

    … <p>I have developed Mito-system —a temperature-pressure variable system for neutron scattering experiments, which contributes recent studies on ice polymorphs. …

    Japanese Magazine of Mineralogical and Petrological Sciences 50(1), 1-9, 2021

    J-STAGE 

  • Deuteration Aiming for Neutron Scattering

    Okuda Aya , Urade Reiko , Kato Koichi , Sugiyama Masaaki , Inoue Rintaro , Morishima Ken , Saio Tomohide , Yunoki Yasuhiro , Yagi-Utsumi Maho , Yagi Hirokazu , Shimizu Masahiro , Sato Nobuhiro

    … <p>The distinguished feature of neutron as a scattering probe is an isotope effect, especially the large difference in neutron scattering length between hydrogen and deuterium. … Therefore, the combination of deuterated protein and neutron scattering enables the selective visualization of a target domain in the complex or a target protein in the multi-component system. …

    Biophysics and Physicobiology 18(0), 16-27, 2021

    J-STAGE 

  • Quasielastic Neutron Scattering Study on Polymorphism of Glycerol Deuterated Triacylglycerols: Comparison with Saturated, Trans-unsaturated and Cis-unsaturated Triacylglycerols

    Takechi Chikayo , Kawaguchi Tatsuya , Kaneko Fumitoshi , Yamamuro Osamu

    … <p>The relationship between the polymorphism and dynamic properties of acyl chains in triacylglycerols (TAGs) was studied using incoherent quasielastic neutron scattering (IQENS). … Glycerol-deuterated TAG samples were employed for the IQENS measurements to reduce the incoherent scattering of the glycerol backbone. …

    Chemistry Letters 50(3), 435-438, 2021

    J-STAGE 

  • Very Slow Phase Transition from the Liquid to Mesophase and Phase-Coexistence in the Ionic Liquid [C<sub>8</sub>mim]BF<sub>4</sub>

    Watanabe Keisuke , Komai Tomomi

    … The ionic liquid structure is expected to be very stable due to the original mesoscopic order, which is predicted by MD simulation, Raman spectroscopy and neutron scattering.</p> …

    Bulletin of the Chemical Society of Japan 94(2), 508-512, 2021

    J-STAGE 

  • Study on Molecular Design and Synthesis of Novel Surfactants, and Physicochemical Properties and Structure of Molecular Assembly  [in Japanese]

    YADA Shiho

    <p>特殊な構造と機能を有する単一鎖長ポリオキシエチレン型およびポリオキシプロピレン-ポリオキシエチレン型の新規非イオン界面活性剤を多種類合成し,それらの物理化学的性質や水溶液中での分子集合体の詳細なナノ構造を解明した。さらに,アミノ酸系界面活性剤が形成する泡沫のミクロ構造を中性子小角散乱により明らかにし,さまざまな測定を組み合わせることで調べ,泡沫のミクロ構造からマクロ構造までを明ら …

    Oleoscience 21(1), 5-12, 2021

    J-STAGE 

  • Hybridized Excitation of Higgs-Amplitude and Phase Modes in Frustrated Quantum Magnet  [in Japanese]

    Masuda Takatsugu , Hayashida Shohei , Matsumoto Masashige

    <p>粒子の運動状態を理解することは物理学の普遍的なテーマであり,特に固体中の何らかの秩序からの励起状態として現れる準粒子の振る舞いはこれまで盛んに研究されてきた.その準粒子の運動は,秩序変数の位相と振幅の揺らぎに対応する2つのモードで記述される.位相モードは南部–ゴールドストーンモードともよばれ,結晶の音響フォノンや磁性体のマグノンがよく知られている(用語解説の図参照).振幅モードは …

    Butsuri 76(1), 23-27, 2021

    J-STAGE 

  • Structure and properties of densified silica glass: characterizing the order within disorder

    Onodera Yohei , Kohara Shinji , Salmon Philip S. , Hirata Akihiko , Nishiyama Norimasa , Kitani Suguru , Zeidler Anita , Shiga Motoki , Masuno Atsunobu , Inoue Hiroyuki , Tahara Shuta , Polidori Annalisa , Fischer Henry E. , Mori Tatsuya , Kojima Seiji , Kawaji Hitoshi , Kolesnikov Alexander I. , Stone Matthew B. , Tucker Matthew G. , McDonnell Marshall T. , Hannon Alex C. , Hiraoka Yasuaki , Obayashi Ippei , Nakamura Takenobu , Akola Jaakko , Fujii Yasuhiro , Ohara Koji , Taniguchi Takashi , Sakata Osami

    世界一構造秩序のあるガラスの合成と構造解析に成功 --ガラスの一見無秩序な構造の中に潜む秩序を抽出--. 京都大学プレスリリース. 2021-12-25.

    NPG Asia Materials (12), 2020-12-23

    IR 

  • Effects of uniaxial pressure on the spin ice Ho2Ti2O7

    Edberg R. , Bakke I. M. B. , Kondo H. , Ørduk Sandberg L. , Haubro M. L. , Guthrie M. , Holmes A. T. , Engqvist J. , Wildes A. , Matsuhira K. , Lefmann K. , Deen P. P. , Mito M. , Henelius P.

    … The parameters determined from the magnetization measurements reproduce neutron scattering measurements that we perform under uniaxial pressure applied along the [110] crystalline direction. …

    Physical review B (102), 184408-1-184408-12, 2020-11-09

    IR 

  • Neutron - Noble Gas Scattering Cross Section Measurements on BL05  [in Japanese]

    ハドック クリストファー

    波紋 : Neutron network news 30(4), 203-206, 2020-11

  • Development and application of a 3He Neutron Spin Filter at J-PARC

    Okudaira T. , Oku T. , Ino T. , Hayashida H. , Kira H. , Sakai K. , Hiroi K. , Takahashi S. , Aizawa K. , Endo H. , Endo S. , Hino M. , Hirota K. , Honda T. , Ikeda K. , Kakurai K. , Kambara W. , Kitaguchi M. , Oda T. , Ohshita H. , Otomo T. , Shimizu H.M. , Shinohara T. , Suzuki J. , Yamamoto T.

    … We are developing a neutron polarizer with polarized He gas, referred to as a He spin filter, based on the Spin Exchange Optical Pumping (SEOP) for polarized neutron scattering experiments at Materials and Life Science Experimental Facility (MLF) of Japan Proton Accelerator Research Complex (J-PARC). …

    Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (977), 2020-10-11

    IR 

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