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Oral presentation

Investigation of phase shifter by use of mica crystal for 1-keV region

Imazono, Takashi; Koike, Masato

no journal, , 

no abstracts in English

Oral presentation

Real-time photoelectron spectroscopic observation of defect formation processes during Si surface oxidation

Ogawa, Shuichi*; Takakuwa, Yuji*; Ishizuka, Shinji*; Yoshigoe, Akitaka; Teraoka, Yuden

no journal, , 

no abstracts in English

Oral presentation

Resonant Auger decay spectra for thin films of biological molecules

Baba, Yuji; Sekiguchi, Tetsuhiro; Shimoyama, Iwao; Nath, K. G.*; Hirao, Norie*

no journal, , 

no abstracts in English

Oral presentation

Fabrication and evaluation of multilayer laminar-type gratings and their application to high resolution monochromators having variable included angles in keV region

Koike, Masato; Ishino, Masahiko; Sano, Kazuo*; Sasai, Hiroyuki*; Takenaka, Hisataka*; Hatayama, Masatoshi*; Heimann, P. A.*; Gullikson, E. M.*

no journal, , 

no abstracts in English

Oral presentation

Study on stress measurement using high energy white synchrotron radiation on BL28B2 at SPring-8

Kiriyama, Koji; Shibano, Junichi*; Hirata, Tomoyuki*; Kajiwara, Kentaro*; Shobu, Takahisa; Suzuki, Kenji*

no journal, , 

no abstracts in English

Oral presentation

Qualitative analysis of DNA strand breaks and base damage induced by soft X-rays

Fujii, Kentaro; Yokoya, Akinari; Shikazono, Naoya

no journal, , 

no abstracts in English

Oral presentation

Sulfur-metal interface behavior studied by S K-edge NEXAFS

Honda, Mitsunori; Baba, Yuji; Hirao, Norie*; Deng, J.; Sekiguchi, Tetsuhiro

no journal, , 

no abstracts in English

Oral presentation

Resonant inelastic X-ray scattering of (La,Sr,Ca)$$_{14}$$Cu$$_{24}$$O$$_{41}$$

Ishii, Kenji; Tsutsui, Kenji*; Toyama, Takami*; Inami, Toshiya; Mizuki, Junichiro; Murakami, Yoichi*; Endo, Yasuo*; Maekawa, Sadamichi*; Kudo, Kazutaka*; Koike, Yoji*; et al.

no journal, , 

(La,Sr,Ca)$$_{14}$$Cu$$_{24}$$O$$_{41}$$ is an attractive material in connection with high-$$T_{rm c}$$ superconductivity because Sr$$_{0.4}$$Ca$$_{13.6}$$Cu$$_{24}$$O$$_{41}$$ becomes a superconductor under high pressure without the CuO$$_2$$ planes. We present RIXS at the Cu $$K$$-edge of (La,Sr,Ca)$$_{14}$$Cu$$_{24}$$O$$_{41}$$ focusing on the momentum dependence of interband excitation across the Mott gap and the intraband excitation below the gap as a function of hole concentration. The experimental results are consistent with the theoretical predictions.

Oral presentation

Resonant inelastic X-ray scattering study of YVO$$_3$$

Ikeuchi, Kazuhiko

no journal, , 

I will present resonant inelastic X-ray scattering measurements of electric excitations in YVO$$_3$$ with the incident energy of the K edge of vanadium at room temperature. We observed excitations corresponding to a Mott gap. We also performed the measurements of polarization dependence of the excitations. Remarkable change was observed on the Mott excitations about the measurements above the Tc of the orbital order.

Oral presentation

Chemical-state selective mapping of Si compounds by micro-XAFS using soft X-rays from synchrotron light source

Hirao, Norie*; Baba, Yuji; Sekiguchi, Tetsuhiro; Shimoyama, Iwao; Honda, Mitsunori; Deng, J.

no journal, , 

no abstracts in English

Oral presentation

X-ray topography on La$$_3$$Ta$$_{0.5}$$Ga$$_{5.5}$$O$$_{14}$$ single crystal

Yoneda, Yasuhiro; Okajima, Yuka; Mizuki, Junichiro; Takeda, Hiroaki*; Shiosaki, Tadashi*

no journal, , 

no abstracts in English

Oral presentation

Electronic structure of superconducting uranium compounds; A SX-ARPES study

Fujimori, Shinichi; Okochi, Takuo; Okane, Tetsuo; Saito, Yuji; Yamagami, Hiroshi; Fujimori, Atsushi; Haga, Yoshinori; Yamamoto, Etsuji; Onuki, Yoshichika*

no journal, , 

no abstracts in English

Oral presentation

Short-lived radicals induced in DNA-bases by oxygen and nitrogen K-shell photoexciation

Yokoya, Akinari; Fujii, Kentaro; Akamatsu, Ken; Ukai, Masatoshi*

no journal, , 

In order to obtain detailed insights into the physicochemical mechanism of DNA damage induction by oxygen and nitrogen K-shell photoexcitation, short-lived radicals induced in DNA-bases, adenine and guanine, were measured by applying an electroparamagnetic resonance (EPR) spectrometer at the SPring-8 soft X-ray beamline, BL23SU. The samples were prepared as an evaporated thin film in a vacuum chamber. Experimental evidence of the effect of water vapor on the yields of the base radicals will be discussed.

Oral presentation

Spectra of X-ray absorption near edge structure of nucleotides in water solution around nitrogen K-edge region

Ukai, Masatoshi*; Yokoya, Akinari; Fujii, Kentaro; Saito, Yuji

no journal, , 

We present the total photoelectron yields from nucleotides in water solution in the region around nitrogen K-edge. The experiment is carried out at the BL-23SU, SPring-8, using the soft X-rays in the energy region of 400 eV, so called "water window" region or just above. The liquid thin water jet ($$phi$$$$sim$$20$$mu$$m) containing nucleotide is intersected by a focused synchrotron-radiation beam, 100(v)$$times$$100(h)$$mu$$m in a vacuum chamber. The photoelectrons ejected from the jet are collected by a channel electron multiplier. We show the first evidence of the spectrum of total photoelectron yields of DNA related compound, deoxy-5'-guanosine mono-phosphoric acid (dGMP), in solution. The spectrum shares some characteristic features with that for solid dGMP. Nitrogen atoms only exist in the guanine site, so that the spectral similarities can be explained by the hydrophobic property of the base site. The spectra for the other nucleotides will be also reported.

Oral presentation

The XAFS structural analysis of the actinide and lanthanide complexes with the hybrid type chelating agent pyridine diamide (PDA)

Shiwaku, Hideaki; Yaita, Tsuyoshi; Kobayashi, Toru; Numakura, Masahiko; Suzuki, Shinichi; Okamoto, Yoshihiro

no journal, , 

no abstracts in English

Oral presentation

Incident energy dependence of metastable adsorption states in O$$_{2}$$/Si(111)

Yoshigoe, Akitaka; Moritani, Kosuke*; Narihiro, Eisuke*; Teraoka, Yuden

no journal, , 

The metastable molecularly adsorption state as a precursor state in O$$_{2}$$/Si(111) at room temeprature is normally observed by many surface analysis method, such as photoelectron spectroscopy. It is known that the adsorption dynamics is changed from trapping-mediated adsorption to direct one at around 0.06eV by means of molecular beam experiment. However, there is no unified adsorption model for those adsorbates. We investigated the incident energy dependence of the metastable moleculary adsorbate by using synchrotron radiation real-time photoelectron spectroscopy. All experiments were performed at SUREAC2000 in SPring-8. The translational kinetic energy was controlled by supersonic molecular beam method up to 2.3eV and real-time photoelectron spectra in 10eV scanning range were measured with the accumulation time of 8s and 22s for O1s and Si2p under molecular beam irradiation. The peak of metastable adsorbate was clearly observed at 0.06eV condition. The peak decreased with incident energy and remained over 0.06eV where the direct adsorption process is dominant. This result suggest that the adsorption pathways are competitive between the trapping-mediated adsorption process via metastable molecularly state and the direct dissociative adsorption one.

Oral presentation

Analysis of HOM-BBU for an ERL light source

Hajima, Ryoichi; Nagai, Ryoji; Sawamura, Masaru; Umemori, Kensei*

no journal, , 

no abstracts in English

Oral presentation

Development of a high-brightness electron injector for future ERL sources

Hajima, Ryoichi; Nishitani, Tomohiro; Iijima, Hokuto; Nagai, Ryoji; Nishimori, Nobuyuki; Tabuchi, Masao*; Noritake, Yosuke*; Hayashitani, Haruhiko*; Takeda, Yoshikazu*

no journal, , 

no abstracts in English

Oral presentation

Electronic states of itinerant uranium compound UB$$_{2}$$ by soft-X-ray angle-resolved photoemission spectroscopy

Okochi, Takuo; Fujimori, Shinichi; Okane, Tetsuo; Saito, Yuji; Fujimori, Atsushi*; Yamagami, Hiroshi*; Haga, Yoshinori; Yamamoto, Etsuji; Onuki, Yoshichika*

no journal, , 

no abstracts in English

19 (Records 1-19 displayed on this page)
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