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Oral presentation

Phase transition of Sn/Ge(111) surface studied by reflection high-energy positron diffraction

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

no journal, , 

no abstracts in English

Oral presentation

Photoconductivity variations of hydrogenated amorphous silicon by charged particles

Sato, Shinichiro; Sai, Hitoshi*; Imaizumi, Mitsuru*; Shimazaki, Kazunori*; Oshima, Takeshi

no journal, , 

no abstracts in English

Oral presentation

Positron annihilation measurements on Si near the melting point

Kawasuso, Atsuo; Maekawa, Masaki

no journal, , 

no abstracts in English

Oral presentation

Start of neutron source and its world's highest-level performance

Maekawa, Fujio

no journal, , 

no abstracts in English

Oral presentation

Fe 3p-$$>$$1s X-ray resonant emission spectroscopy of LuFe$$_{2}$$O$$_{4}$$ single crystal

Agui, Akane; Mizumaki, Masaichiro*; Kawamura, Naomi*; Kuroda, Tomoko*; Hayakawa, Hironori*; Maeda, Daisuke*; Michiuchi, Takamasa*; Ikeda, Naoshi*

no journal, , 

no abstracts in English

Oral presentation

Simple glass model with two kinds of order parameters

Yokota, Terufumi

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

Neutron scattering study of spin ladder compound Na$$_2$$Fe$$_2$$(C$$_2$$O$$_4$$)$$_3$$(H$$_2$$O)$$_2$$

Matsuda, Masaaki; Honda, Zentaro*

no journal, , 

We performed neutron inelastic scattering experiments in Na$$_2$$Fe$$_2$$(C$$_2$$O$$_4$$)$$_3$$(H$$_2$$O)$$_2$$ that consists of two-leg spin ladders of Fe$$^{2+}$$ ions. We observed sharp magnetic excitation peaks around $$sim$$3.5 meV and $$sim$$5.3 meV. This result shows that the magnetic excitations originate from almost isolated dimers, indicating that the interaction along the leg direction is negligibly small.

Oral presentation

Polized neutron diffraction study of magnetic chirality in TmMn$$_2$$O$$_5$$

Wakimoto, Shuichi; Kimura, Hiroyuki*; Fukunaga, Mamoru*; Takeda, Masayasu; Kakurai, Kazuhisa; Noda, Yukio*

no journal, , 

no abstracts in English

Oral presentation

Resonant inelastic X-ray scattering study of stripe-ordered La$$_{2-x}$$Sr$$_{x}$$NiO$$_{4}$$ and La$$_{2-x}$$Ba$$_{x}$$CuO$$_{4}$$

Wakimoto, Shuichi; Ishii, Kenji; Ikeuchi, Kazuhiko; Kakurai, Kazuhisa; Mizuki, Junichiro; Kimura, Hiroyuki*; Noda, Yukio*; Adachi, Tadashi*; Koike, Yoji*; Fujita, Masaki*; et al.

no journal, , 

no abstracts in English

Oral presentation

Magnetic structures and multiferroic properties of LiCu$$_{2}$$O$$_{2}$$; Neutron scattering

Yasui, Yukio*; Sato, Kenji*; Moyoshi, Taketo*; Kobayashi, Yoshiaki*; Sato, Masatoshi*; Kakurai, Kazuhisa

no journal, , 

no abstracts in English

Oral presentation

Shell and nuclear structure in unstable nuclei over N=28

Utsuno, Yutaka; Otsuka, Takaharu*; Brown, B. A.*; Homma, Michio*; Mizusaki, Takahiro*

no journal, , 

no abstracts in English

Oral presentation

A Guiding-centre fundamental 1-form with strong E$$times$$B flow

Miyato, Naoaki; Scott, B. D.*; Strintzi, D.*; Tokuda, Shinji

no journal, , 

A guiding-centre fundamental 1-form whose symplectic part does not include the E$$times$$B 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 E$$times$$B 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.

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)