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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

Equation of state of quark-hadron mixed phase with pasta structures and its effects on the magnetar structure

Yasutake, Nobutoshi*; Maruyama, Toshiki; Tatsumi, Toshitaka*; Kiuchi, Kenta*; Kotake, Kei*

no journal, , 

no abstracts in English

Oral presentation

Lifetime measurements of long-lived isomers in $$^{162,165}$$Gd using a total absorption detector

Asai, Masato; Hayashi, Hiroaki*; Osa, Akihiko; Sato, Tetsuya; Otokawa, Yoshinori; Nagae, Daisuke; Tsukada, Kazuaki; Miyashita, Yuji*; Ouchi, Hiroyuki*; Izumi, Sayaka*; et al.

no journal, , 

We have developed a new method to measure lifetime of long-lived isomers populated through the $$beta$$ decay, using a total absorption detector. Using this method, we have determined lifetime of the K isomers in $$^{162}$$Gd and $$^{165}$$Gd for the first time. The short-lived neutron-rich nuclei $$^{162}$$Eu and $$^{165}$$Eu were produced and mass-separated by the on-line isotope separator (ISOL) at JAEA tandem accelerator facility. Beta- and $$gamma$$ rays emitted by the $$beta$$ decay of $$^{162,165}$$Eu were total-absorbed by the detector, and all the events were recorded with time stamps. This method enabled us to determine lifetime of the isomers with more than 100-$$mu$$s lifetime.

Oral presentation

Laser-driven proton beam irradiation on in-vitro human cancer cells

Yogo, Akifumi; Sato, Katsutoshi*; Nishikino, Masaharu; Mori, Michiaki; Teshima, Teruki*; Numasaki, Hodaka*; Murakami, Masao*; Ogura, Koichi; Sagisaka, Akito; Orimo, Satoshi; et al.

no journal, , 

In this work, we demonstrate the irradiation effect of laser accelerated protons induced on human lung cancer cells. In-vitro A549 cells are irradiated with a proton dose of 20 Gy, resulting in a distinct formation of $$gamma$$-H2AX foci as an indicator of DNA double-strand breaks. This is the first result showing that laser-driven ion beams can generate a lethal effect on cancer cells.

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

Field-induced incommensurate order in the distorted diamond chain

Sakai, Toru; Tonegawa, Takashi*; Okamoto, Kiyomi*

no journal, , 

The S=1/2 distorted diamond chain is investigated by the density matrix renormalization group and the numerical exact diagonalization. We found that an incommensurate long-range order is induced by the external magnetic field above the 1/3 magnetization plateau. We using this result theoretically explain the field induced incommensurate order observed in the azurite.

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

A Multi-step magnetization process of CsFeCl$$_3$$

Inami, Toshiya

no journal, , 

no abstracts in English

Oral presentation

Photon scattering experiments on nuclei at iron region using a $$gamma$$-ray beam from inverse Compton scattering

Shizuma, Toshiyuki; Hayakawa, Takehito; Kikuzawa, Nobuhiro; Ogaki, Hideaki*; Toyokawa, Hiroyuki*; Komatsubara, Tetsuro*

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

$$^{149}$$Sm synchrotron M$"{o}$ssbauer studies on hydrides of rare-earth-iron compounds

Masuda, Ryo; Mitsui, Takaya; Ito, Keiji*; Kobayashi, Yasuhiro*; Kitao, Shinji*; Seto, Makoto

no journal, , 

no abstracts in English

Oral presentation

Current status of software development for chopper spectrometer in MLF

Inamura, Yasuhiro; Nakajima, Kenji; Kajimoto, Ryoichi; Otomo, Toshiya*; Nakatani, Takeshi; Suzuki, Jiro*; Arai, Masatoshi; So, J.-Y.*; Park, J.-G.*; Perring, T.*; et al.

no journal, , 

We report the plan and current status of development for software used on high-intensity chopper spectrometer, 4SEASONS, and Cold Neutron Disk-Chopper Spectrometer, CNDCS, at Materials and Life Science Facility(MLF), J-PARC. We begin to design software packages based on many required functions for performing experiments and analysis, for example control spectrometer system (data acquisition, devices), suggestion of experiment conditions, visualization and so on. This project progresses with software company. On the other hand, we started to collaborate with Korean group about the development of analysis software for inelastic scattering. In this presentation, we will present the current status and plan for software development including collaboration with Korean group.

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)