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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

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

Effects of nuclear deformation on fission fragment mass distributions in the reaction of $$^{30}$$Si+$$^{238}$$U

Nishio, 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

Oral presentation

Effect of the laser contrast to laser accelerated electron beams

Kotaki, Hideyuki; Kando, Masaki; Daito, Izuru; Homma, Takayuki; Kameshima, Takashi; Kawase, Keigo; Chen, L. M.*; Fukuda, Yuji; Kiriyama, Hiromitsu; Kondo, Shuji; et al.

no journal, , 

no abstracts in English

Oral presentation

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 $$bar K$$ - $$bar K$$ 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

Observation of temperature dependence of charge excitation spectra in Sr$$_{14-x}$$Ca$$_x$$Cu$$_{24}$$O$$_{41}$$ ($$x$$ = 0, 6) by resonant inelastic X-ray scattering

Yoshida, Masahiro; Ishii, Kenji; Jarrige, I.; Ikeuchi, Kazuhiko; Murakami, Yoichi*; Mizuki, Junichiro; Tsutsui, Kenji; Toyama, Takami*; Maekawa, Sadamichi*; Kudo, Kazutaka*; 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

Nuclear liquid drop model revisited

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, $$A< 50$$) is larger than that of heavier nuclei.

Oral presentation

Development and application of high-pressure technique for single-crystal magnetic neutron diffraction under 10 GPa

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 RB$$_{2}$$C$$_{2}$$ (R=Dy, Ho) up to 9 GPa with the modified hybrid-anvil device.

Oral presentation

Chopper-type neutron inelastic spectrometer 4SEASONS at MLF, J-PARC

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

Oral presentation

Present status of experimental apparatus for neutron optics and physics at J-PARC BL05

Sakai, Kenji; Muto, Suguru*; Ino, Takashi*; Yoshioka, Tamaki*; Mishima, Kenji*; Taketani, Kaoru*; Shimizu, Hirohiko*

no journal, , 

no abstracts in English

Oral presentation

Control of aberrations in acceleration lens system to form gaseous ion nanobeam

Okubo, Takeru; Ishii, Yasuyuki

no journal, , 

Chromatic and spherical aberrations are hindrance in a development of acceleration lens system to form the nanobeam with 1 MeV ion beam. However, chromatic and spherical aberrations are hindrance to form the nanobeam. Optics simulations were carried out to show that a combination of acceleration lenses and deceleration lenses is effective to reduce chromatic and spherical aberrations in the acceleration lens system. As a result, the deceleration energy of 15 keV for the 46 keV hydrogen molecule ion beam enabled us to reduce the chromatic aberration coefficient by 26 % and the spherical aberration coefficient by 17 %, and the beam current increased by 27 %.

Oral presentation

Study of uranium chalcogenides by soft X-ray photoemission spectroscopy

Takeda, Yukiharu; Okane, Tetsuo; Okochi, Takuo; Saito, Yuji; Yamagami, Hiroshi; Fujimori, Atsushi; Ochiai, Akira*

no journal, , 

no abstracts in English

106 (Records 1-20 displayed on this page)