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UNishio, Katsuhisa; Ikezoe, Hiroshi; Nishinaka, Ichiro; Mitsuoka, Shinichi; Nagame, Yuichiro; Watanabe, Yutaka*; Otsuki, Tsutomu*; Hirose, Kentaro*; Sato, Hiroki*; Hofmann, S.*
no journal, ,
no abstracts in English
Kotaki, Hideyuki; Kando, Masaki; Daito, Izuru; Homma, Takayuki; Kameshima, Takashi; Kawase, Keigo; Chen, L. M.*; Fukuda, Yuji; Kiriyama, Hiromitsu; Kondo, Shuji; et al.
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no abstracts in English
Hosaka, Koichi; Itakura, Ryuji; Yokoyama, Keiichi; Yamanouchi, Kaoru*; Yokoyama, Atsushi
no journal, ,
In intense laser fields, molecules are decomposed into fragments through a number of competing dissociative ionization pathways. We investigate the dissociative ionization dynamics of ethanol in intense laser fields with photoelectron-photoion coincidence momentum imaging. The channel-specific photoelectron spectra reveal the electronic states prepared just after ionization, depending both on the decomposition pathways and on the temporal profile of laser pulses.
Moribayashi, Kengo
no journal, ,
no abstracts in English
Kawasuso, Atsuo; Maekawa, Masaki
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Maekawa, Fujio
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O; Neutron scatteringYasui, Yukio*; Sato, Kenji*; Moyoshi, Taketo*; Kobayashi, Yoshiaki*; Sato, Masatoshi*; Kakurai, Kazuhisa
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no abstracts in English
Utsuno, Yutaka; Otsuka, Takaharu*; Brown, B. A.*; Homma, Michio*; Mizusaki, Takahiro*
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no abstracts in English
B flowMiyato, Naoaki; Scott, B. D.*; Strintzi, D.*; Tokuda, Shinji
no journal, ,
A guiding-centre fundamental 1-form whose symplectic part does not include the EB term is derived by the Lie-transform perturbation method. Since the symplectic part of the derived 1-form is the same as the standard one without the strong EB flow formally, it yields the standard Lagrange and Poisson brackets. Therefore the guiding-centre Hamilton equations also keep the standard form. The guiding-centre Hamiltonian is rather complicated compared to the previous ones. However, it is possible to simplify the Hamiltonian in localised transport barrier region like the tokamak H-mode edge.
Oyamatsu, Kazuhiro*; Iida, Kei*; Koura, Hiroyuki
no journal, ,
Liquid drop model is a representative model to describe binding energy and size of nuclei. This model is well reproduces bulk properties of nuclei even in current studies on nuclei. In this presentation, we investigate nuclear symmetry energy and nuclear surface energy by using the nuclear liquid drop model with some higher-order terms. The coefficients of these term are determined so as to reproduce measured nuclear masses of approximately 2200 nuclides. From this analysis we find an indication that the fourth-order terms of the symmetry energy is required and the curvature term of it is negligible. Regarding a mass-number dependency on nuclear radius, we also find that the dependency of lighter nuclei (typically with mass number, 
) is larger than that of heavier nuclei.
Osakabe, Toyotaka; Yamauchi, Hiroki
no journal, ,
We have developed a hybrid-anvil high-pressure device for single-crystal magnetic neutron diffraction beyond 3 GPa. The device consists of an opposed pair of an upper sapphire anvil and a lower WC anvil. Maximum pressure generated by the device is 7 GPa. To increase the maximum pressure up to 10 GPa, we tried three types of the lower anvil instead of the simple sapphire anvil. One is a sapphire anvil with a thin diamond cap, another is a sapphire anvil supported by a MP35 alloy, and the other is a SiC anvil supported by a MP35 alloy. We found that the modified hybrid-anvil, that is, the combination of the WC anvil and the supported SiC anvil could generate the pressure of 10 GPa at the load of 3.8 tons. The size of the sample chamber under 10 GPa was about 1 mm diameter and 0.25 mm height, which is sufficient for magnetic neutron diffraction experiments. We succeed in the magnetic neutron diffraction experiments on the RBC (R=Dy, Ho) up to 9 GPa with the modified hybrid-anvil device.
Kajimoto, Ryoichi; Yokoo, Tetsuya*; Nakamura, Mitsutaka; Nakajima, Kenji; Inamura, Yasuhiro; Takahashi, Nobuaki; Maruyama, Ryuji; Soyama, Kazuhiko; Mizuno, Fumio; Shibata, Kaoru; et al.
no journal, ,
no abstracts in English
Hamamatsu, Kiyotaka
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no abstracts in English
Kira, Hiroshi; Oku, Takayuki; Shinohara, Takenao; Suzuki, Junichi; Takata, Shinichi; Arai, Masatoshi
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no abstracts in English
Shinohara, Takenao; Oku, Takayuki; Suzuki, Junichi; Takata, Shinichi; Kira, Hiroshi; Aizawa, Kazuya; Arai, Masatoshi
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no abstracts in English
Masui, Tomomi; Shikinaka, Kazuhiro*; Koizumi, Satoshi; Kakugo, Akira*; Hashimoto, Takeji; Gong, J.*
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Hierarchical structures of F-actin, an anionic polyelectrolyte, and PDMAPAA-Q, a synthetic linear cationic polyelectrolyte (polycation), complexes in KCl salt solutions have been examined over a wide range of length scales from nanometer to micrometer using a combination of ultra-small-angle neutron scattering technique and fluorescence microscopy. We found hierarchical condensation of actin/polycation complex composed of a superbundle of 10 micrometer, protobundle of 100 nanometer, and protofilament (F-actin) of nanometer. These structures are largely influenced by salt concentrations. With increase of salt concentration superbundle structure changes from globular to extended states, simultaneously, the regularity of F-actin inside the protobundle increased and protobundle size increased about ten times larger. Further increase of salt concentration brings the protobundle disassemble to single F-actin.
Katayama, Yoshinori; Yomogida, Yoshiki; Saito, Hiroyuki; Aoki, Katsutoshi
no journal, ,
Hydrogen reacts with many metals and form metal hydrides. In transition metal hydrides, hydrogen atoms usually occupy interstitial sites and the crystalline lattice expands. To study effect of hydrogen to the structure of liquid metals, we have performed high-pressure X-ray diffraction experiments on liquid iron hydride. Measurements on liquid pure iron were also performed for comparison. Measurements were carried out on BL14B1 at SPring-8. LiAlH
was used as a hydrogen source. Structure factor, S(Q), of liquids were obtained from X-ray diffraction data. Structure factors for iron and that for hydride are similar, although the second peak for hydride is more asymmetric. This asymmetry suggests some local orders in hydride. The peak positions are almost the same. Possible causes of the small change in Fe-Fe distance are (1) low concentration of hydrogen in the liquid state, and (2) superabundant vacancy formation reported in the solid state.
irradiated with high energy ions, 3Ohara, Kota; Ishikawa, Norito; Sakai, Seiji; Matsumoto, Yoshihiro; Michikami, Osamu*; Ota, Yasuyuki*; Kimura, Yutaka*
no journal, ,
Irradiation-induced new X-ray diffraction peak is analyzed based on the model that nano-meter size ion tracks are formed in ion-irradiated CeO. X-ray diffraction profile can be interpreted by taking account of overlapping effect.
Yamazaki, Dai; Maruyama, Ryuji; Soyama, Kazuhiko; Takai, Hiroyuki*; Nagai, Mikinori*; Yamamura, Kazuya*
no journal, ,
no abstracts in English
OKomatsu, Takuma*; Kambe, Takashi*; Michiuchi, Takamasa*; Hayakawa, Hironori*; Oishi, Daisuke*; Hanasaki, Noriaki*; Ikeda, Naoshi*; Yoshii, Kenji
no journal, ,
LuFeO is a ferroelectric material arising from the real-space ordering of Fe charges below 330 K. In this paper, we measured the magnetic-field dependence of dielectric response in this material. We report a change of dielectric constant depending on the measurement temperature and applied magnetic field.