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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

Present status of the development of the Compton backscattered at sub-MeV energy range; Laser pulse compression with SBS

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

no journal, , 

After the confirmation of the generation of the Compton backscattered X-rays with Nd:YAG laser and 150 MeV electron beam pulses at last fiscal year, we make some improvements for increase the generated X-ray flux. As one of them, we are developing the laser pulse compression with the stimulated Brillouin scattering (SBS) to obtain a high peak intensity of the Nd:YAG laser. As the SBS medium, we adopt a liquid fluorocarbon which has well achievements for the pulse compression at ILE at Osaka University. We aim the compressed pulse duration to be less than 1 ns. On this meeting we show the present status of the SBS pulse compression system for the Compton backscattering. In addition, we present the recent result of the Compton backscattering experiment without the laser compression technique.

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

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

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

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

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

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)