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Oral presentation

Simulation of autoactivation PET by proton beams, 1

Okazaki, Yoshiko

no journal, , 

no abstracts in English

Oral presentation

Electron dynamics after inner shell vacancy creation by XFEL

Otobe, Tomohito; Yabana, Kazuhiro*

no journal, , 

Studies of the damage of biomolecule by the X-ray free electron laser (XFEL) is important to achieve the structure analysis of the single biomolecule. We simulate the electron dynamics after the inner shell vacancy by the XFEL employing the time-dependent density-functional theory (TDDFT). We found the intense electron dynamics after the inner shell vacancy creation and that the electron dynamics enhances the shake-off probability strongly.

Oral presentation

Atomic processes of the damage of bio-molecules irradiated by XFEL, 2

Moribayashi, Kengo

no journal, , 

no abstracts in English

Oral presentation

Oscillation photography applied to resonant X-ray diffraction

Inami, Toshiya; Terada, Noriki*; Kitazawa, Hideaki*; Toyokawa, Hidenori*

no journal, , 

no abstracts in English

Oral presentation

A Study of multi-step magnetization process of TbB$$_4$$, 2

Inami, Toshiya; Owada, Kenji; Ouyang, Z. W.*; Matsuda, Yasuhiro*; Nojiri, Hiroyuki*; Matsumura, Takeshi*; Murakami, Yoichi*

no journal, , 

no abstracts in English

Oral presentation

O1s excitation of gas-phase water; Highly-excited neutral fragments and lifetime-resolved fluorescence

Harries, J.; Kuniwake, Miki*; Homma, Kenji*; Gejo, Tatsuo*; Sullivan, J. P.*; Azuma, Yoshiro*

no journal, , 

Long-lived, highly-excited neutral hydrogen atoms are produced near the O 1s edge of the water molecule. This metastable yield has been studied, along with the kinetic energy of the particles. The excited particles also can decay via fluorescence to the ground state, and by lifetime-resolved detection of the fluorescence new information on the dissociation dynamics can be obtained.

Oral presentation

Effect of electron-impact ionization in damage of bio-molecules irradiated by XFEL

Kai, Takeshi

no journal, , 

no abstracts in English

Oral presentation

Low-temperature phase of Sn adsorbed semiconductor surface studied by reflection high-energy positron diffraction

Hashimoto, Mie; Fukaya, Yuki; Kawasuso, Atsuo; Ichimiya, Ayahiko

no journal, , 

no abstracts in English

Oral presentation

Pointing stability of quasi-monoenergetic electron bunch accelerated by laser wakefield

Mori, Michiaki; Mizuta, Yoshio*; Kondo, Kiminori; Nishiuchi, Mamiko; Kado, Masataka; Kando, Masaki; Pirozhkov, A. S.; Kotaki, Hideyuki; Ogura, Koichi; Sugiyama, Hironori*; et al.

no journal, , 

The stability and collimatability of quasi-monoenergetic electron beam production in the self-injected laser-plasma acceleration regime are studied. The collimation of electron beam drived by terawatt femtosecond laser (4.5 TW, 40 fs) is measured at two species of gas material (Helium gasjet and Argon gasjet). We measured 3.2 mrad pointing stability and beam divergence of 11 mrad (r.m.s.) at Argon gasjet for 50 continuous shots. At such condition, the peak electron energy is 9.1$$pm$$1.6 MeV. For Helium, the pointing stability is three times larger than that of Argon. It is considered that the laser channel formation is important role for stable electron beam generation.

Oral presentation

Energy stability analyses of stainless steel using extended semi-empirical computational method

Igarashi, Takahiro; Nakazawa, Tetsuya; Tsuru, Tomohito; Kaji, Yoshiyuki

no journal, , 

no abstracts in English

Oral presentation

NQR study of complex quadrupole ordering in UPd$$_3$$

Tokunaga, Yo; Fujimoto, Tatsuya*; Sakai, Hironori; Chudo, Hiroyuki; Kambe, Shinsaku; Matsuda, Tatsuma; Haga, Yoshinori; Onuki, Yoshichika

no journal, , 

no abstracts in English

Oral presentation

Measurement of energy loss spectrum in reflection high-energy positron diffraction

Fukaya, Yuki; Hashimoto, Mie; Kawasuso, Atsuo; Ichimiya, Ayahiko

no journal, , 

no abstracts in English

Oral presentation

Noble metal adsorption induced Si(111)-$$sqrt{21}timessqrt{21}$$ superstructure studied by reflection high-energy positron diffraction

Fukaya, Yuki; Matsuda, Iwao*; Hashimoto, Mie; Narita, Hisashi*; Kawasuso, Atsuo; Ichimiya, Ayahiko

no journal, , 

no abstracts in English

Oral presentation

Spin-Spin relaxation in heavy fermion system Sn$$_3$$

Kambe, Shinsaku; Sakai, Hironori; Tokunaga, Yo; Chudo, Hiroyuki; Matsuda, Tatsuma; Haga, Yoshinori; Yasuoka, Hiroshi

no journal, , 

Spin-Spin relaxation is measured in a heavy fermion system. From T-dependence of Gaussian and Loretzian parts, real part of general magnetic susceptibility is discussed.

Oral presentation

Many-body effects on transport properties of one-dimensional Hubbard chains

Onishi, Hiroaki; Dagotto, E.*

no journal, , 

no abstracts in English

Oral presentation

Surface-Plasmon-Resonance (SPR) based photoelectron emission

Kunieda, Yuichi; Kawachi, Tetsuya; Hasegawa, Noboru; Nagashima, Keisuke

no journal, , 

no abstracts in English

Oral presentation

Neutron diffraction study in spinel GeCo$$_2$$O$$_4$$ in magnetic field

Matsuda, Masaaki; Hoshi, Takemichi*; Katori, Hiroko*; Kosaka, Masashi*; Takagi, Hidenori*

no journal, , 

GeCo$$_2$$O$$_4$$ has the spinel structure, in which the Co$$^{2+}$$ moments with $$S$$=3/2 are located at the corners of the tetrahedron. It shows an antiferromagnetic ordering with a characteristic wave vector of $$Q$$=(1/2, 1/2, 1/2) below $$Trm_Nsim$$21 K accompanied by a structural phase transition from cubic to tetragonal symmetry. This compound also exhibits a magnetic phase transition at $$H_csim$$4 T. Magnetic field dependence of some magnetic Bragg peak intensities was measured. For example, the (1/2, 1/2, 1/2) Bragg intensity increases with increasing magnetic field up to 4 T and gradually decreases above 4 T. This characteristic field is consistent with Hc. The field dependence of the intensity probably originates from the combined effects of the redistribution of the magnetic domains and a magnetic phase transition.

Oral presentation

Improvement of plasma confinement during lower-hybrid current drive

Uehara, Kazuya; Seki, Masami; Moriyama, Shinichi; Oyama, Naoyuki; Isayama, Akihiko; Kubo, Hirotaka

no journal, , 

In the lower-hybrid current drive experiment for aiming the stationary operation in tokamaks another improved confinement mode to be suppressed the anomalous transport were observed in JT-60, TRIUM-1M and so on. In JT-60, the lower-hybrid current drive experiment by injecting two waves having different frequency the improved confinement like the H mode was found with extremely lower threshold power and in the JT-60U the more efficient electron heating in the core plasma region was found at the negative shear current profile with extremely lower injected power. Considering the physical mechanism of these improved confinement modes of the lower-hybrid current drive experiment some simple calculations are performed to be compared for the experimental results.

Oral presentation

Transport properties of unique neptunium superconductor NpPd$$_5$$Al$$_2$$, 2

Matsuda, Tatsuma; Haga, Yoshinori; Tateiwa, Naoyuki; Aoki, Dai*; Ikeda, Shugo*; Homma, Yoshiya*; Shiokawa, Yoshinobu*; Settai, Rikio*; Onuki, Yoshichika

no journal, , 

no abstracts in English

Oral presentation

Charge ordering patterns of A$$_{1/3}$$V$$_{2}$$O$$_{5}$$(A=Na,Sr) studied by resonant X-ray scattering

Owada, Kenji; Fujii, Yasuhiko; Murakami, Yoichi*; Yamauchi, Toru*; Ueda, Yutaka*

no journal, , 

no abstracts in English

79 (Records 1-20 displayed on this page)