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Oral presentation

In-NMR study of CeIrIn$$_5$$

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

no journal, , 

T-dependence and anisotropy of Knight shift and spin-lattice relaxation time T1 of In-NMR have been determined in heavy fermion superconductor CeIrIn$$_5$$. Knight shift and T1 show a strong anisotropy. Knight shift versus static susceptibility plot is non-linear at low temperatures, indicating that the hyperfine coupling depends on temperature. The origin of hyperfine interaction and anisotropy of spin fluctuations will be discussed.

Oral presentation

Dissociative ionization dynamics of ethanol in intense laser fields by photoelectron-photoion coincidence momentum imaging

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.

Oral presentation

Study of atomic processes of the damage of bio-molecules caused by XFEL, 3; Structure factor calculation including the damage

Moribayashi, Kengo

no journal, , 

no abstracts in English

Oral presentation

Direct observation of the Ni-3d electronic states change in PrNiO$$_{3}$$

Mizumaki, Masaichiro*; Agui, Akane; Saito, Takashi*; Azuma, Masaki*; Shimakawa, Yuichi*; Takano, Mikio*; Uozumi, Takayuki*

no journal, , 

no abstracts in English

Oral presentation

NQR study 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

Nuclear charge radii calculated with finite range droplet model

Iimura, Hideki; Buchinger, F.*

no journal, , 

no abstracts in English

Oral presentation

Effects of electron-phonon interaction in quantum-dot systems

Onishi, Hiroaki; Dagotto, E.*

no journal, , 

no abstracts in English

Oral presentation

An Analysis of EUV spectra emitted from highly-charged tungsten ions in JT-60U high-temperature plasmas

Yanagibayashi, Jun; Nakano, Tomohide; Hasuo, Masahiro*; Iwamae, Atsushi; Kubo, Hirotaka; Itami, Kiyoshi

no journal, , 

Tungsten is one of the candidates for the divertor material of ITER because of its low retention and low hydrogen inventory. However, it is a problem that tungsten ions accumulated in a core plasma emit intense radiation and cool the plasma. For preparation of investigating the mechanism of the tungsten ion accumulation, Vaccum Ultra Violet (VUV) lines emitted from tungsten ions are identified. A VUV spectrum from a JT-60U plasma ($$T_{e} sim 6$$ keV) is observed with a flat-field grazing-incidence spectrometer. The observed spectrum is compared with a theoretical spectrum calculated with Flexible Atomic Code. It is found that the observed peaks around 3 nm are due to transitions between $$n = 3$$ levels of W$$^{q+}$$ ($$47 le q le 53$$), and that those around 5, 6 and 13 nm are due to transitions between $$n = 4$$ levels of W$$^{q+}$$ ($$41 le q le 45$$). It is believed that the former lines are useful to diagnose the tungsten ion accumulation in a high-temperature ($$T$$$$_{e}$$ $$>$$ 10 keV) plasma of ITER.

Oral presentation

Low temperature structure of FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ magnetic superconductor

Mochiku, Takashi*; Hata, Yoshiaki*; Tuerxun, W.*; Igawa, Naoki; Hoshikawa, Akinori*; Ishigaki, Toru*; Yasuoka, Hiroshi*; Hirata, Kazuto*

no journal, , 

FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ is known as the Ba$$_{2}$$YCu$$_{3}$$O$$_{6+delta}$$ related super conducting compound with the substitution of the Fe for Cu, only when it is annealed in reduced atmosphere and subsequently in oxidized atmosphere. In this study, we have performed neutron powder diffraction of FeSr$$_{2}$$YCu$$_{2}$$O$$_{6+delta}$$ to investigate the magnetic disorder-ordering mechanism. No magnetic reflection was observed even below the magnetic transition temperature. This result indicated that the material has not long-range magnetic-ordering.

Oral presentation

First-order transition at upper critical field in NpPd$$_5$$Al$$_2$$ superconductor, 2

Haga, Yoshinori; Homma, Yoshiya*; Matsuda, Tatsuma; Tateiwa, Naoyuki; Aoki, Dai*; Onuki, Yoshichika

no journal, , 

no abstracts in English

Oral presentation

Effects of $$bar K$$ - $$bar K$$ interaction on the multi-Kaonic nuclei

Muto, Takumi*; Maruyama, Toshiki; Tatsumi, Toshitaka*

no journal, , 

no abstracts in English

Oral presentation

Study of hydration structure of palladium(II) ion via first principles molecular dynamics

Ikeda, Takashi

no journal, , 

no abstracts in English

Oral presentation

Local structure analysis of BiFeO$$_3$$-BaTiO$$_3$$ solid solution

Yoneda, Yasuhiro; Yoshii, Kenji; Mori, Shigeo*

no journal, , 

Local structure analysis of 0.75BiFeO$$_3$$-0.25BaTiO$$_3$$ solid solution was carried out by a synchrotron radiation X-ray pair-distribution function (PDF) method with the temperature range from room temperature to 900$$^circ$$C. The 0.75BiFeO$$_3$$-0.25BaTiO$$_3$$ occurred two phase transitions. The average structure of changed from low-temperature rhombohedral structure to pseudo-cubic structure at 500$$^circ$$C, but the local structure unchanged. The local structure changed at second phase transition from pseudo cubic structure to cubic structure at 800$$circ$$C. The local structure of the pseudo-cubic phase can be reproduced not by the average cubic structure but by the distorted rhombohedral structure.

Oral presentation

AMATERAS; A Cold-neutron disk-chopper spectrometer

Nakajima, Kenji; Kawamura, Seiko; Kajimoto, Ryoichi; Inamura, Yasuhiro; Takahashi, Nobuaki; Osakabe, Toyotaka; Wakimoto, Shuichi; Nakamura, Mitsutaka; Ito, Shinichi*; Aizawa, Kazuya; et al.

no journal, , 

no abstracts in English

Oral presentation

In-beam $$gamma$$-ray spectroscopy of $$^{248,250,252}$$Cf using neutron-transfer reactions

Takahashi, Ryuta; Ishii, Tetsuro; Nagae, Daisuke; Asai, Masato; Tsukada, Kazuaki; Toyoshima, Atsushi; Ishii, Yasuo; Matsuda, Makoto; Shizuma, Toshiyuki; Makii, Hiroyuki*; et al.

no journal, , 

no abstracts in English

Oral presentation

Synchrotron radiation photoemission study of uranium compounds

Fujimori, Shinichi; Okochi, Takuo; Okane, Tetsuo; Saito, Yuji; Yamagami, Hiroshi; Fujimori, Atsushi; Aoki, Dai*; Ikeda, Shugo*; Matsuda, Tatsuma; Haga, Yoshinori; et al.

no journal, , 

We have performed synchrotron radiation photoemission study on UFeGa$$_5$$, UB$$_2$$, UPd$$_3$$, UPd$$_2$$Al$$_3$$, UNi$$_2$$Al$$_3$$, URu$$_2$$Si$$_2$$, UPt$$_3$$, UGe$$_2$$, UIr, UPtGa$$_5$$, USb$$_2$$, and UN. Their electronic structures are discussed based on their valence band and core-level photoelectron spectra.

Oral presentation

Software development for neutron experimental instruments at MLF, J-PARC

Nakatani, Takeshi; Inamura, Yasuhiro; Ito, Takayoshi; Kajimoto, Ryoichi; Aoyagi, Tetsuo; Ohara, Takashi; Otomo, Toshiya*; Yasu, Yoshiji*; Suzuki, Jiro*; Morishima, Takahiro*; et al.

no journal, , 

We have started the commissioning of the neutron scattering experiment instruments since May 2008 in MLF, J-PARC. Simultaneously, we have started the commissioning of the data acquisition and analysis software. Experimental users operate this software through the software framework which we have developed. The software framework was developed based on Python which is an object oriented script language. The system implemented with the software framework can seamlessly measure, analyze and visualize with some modules which are experimental control and data analysis. In this presentation, we report the process of the construction and the current status of the software.

Oral presentation

Effect of interfacial roughness correlation on diffuse intensity in a neutron supermirror

Maruyama, Ryuji; Yamazaki, Dai; Ebisawa, Toru*; Soyama, Kazuhiko

no journal, , 

no abstracts in English

Oral presentation

Secondary electron emission from amorphous carbon foils by impact of swift carbon cluster ions

Takahashi, Yasuyuki; Narumi, Kazumasa; Chiba, Atsuya; Saito, Yuichi; Yamada, Keisuke; Ishikawa, Norito; Sugai, Hiroyuki; Maeda, Yoshihito

no journal, , 

no abstracts in English

Oral presentation

Observation of pressure-induced disproportionation reaction of LaH$$_2$$ using vibrational spectroscopies

Sakurai, Yoko; Machida, Akihiko; Aoki, Katsutoshi

no journal, , 

no abstracts in English

106 (Records 1-20 displayed on this page)