Volume 04（1999）
（財）高輝度光科学研究センター 副理事長、放射光研究所長 JASRI Vice President, Director of JASRI Research Sector
1. ハイライト／HIGHLIGHT
日本原子力研究所 関西研究所 放射光利用研究部 Department of Synchrotron Radiation Research, Kansai Research Establishment, JAERI
理化学研究所 播磨研究所 X線干渉光学研究室 Coherent X-ray Optics Laboratory, Harima Institute,RIKEN
- Abstract
- Four beamlines completed, and to be completed by RIKEN are introduced in terms of their characteristics, accomplishment, and future perspective. Status of two biostructural beamlines (BL45XU and BL44B2) are for user operation. Physics beamline I (BL29XU) started commissioning, but to be extended as a 1 km beamline by the end of FY 1999. Physics beamline II (BL19XU) will be completed as the first long undulator beamline in SPring-8 in autumn 2000.
2. SPring-8の現状／PRESENT STATUS OF SPring-8
放射光利用研究促進機構 （財）高輝度光科学研究センター 企画調査部 Organization for the Promotion of Synchrotron Radiation Research･JASRI Planning Division
放射光利用研究促進機構 （財）高輝度光科学研究センター Organization for the Promotion of Synchrotron Radiation Research･JASRI
放射光利用研究促進機構 （財）高輝度光科学研究センター Organization for the Promotion of Synchrotron Radiation Research･JASRI
（財）高輝度光科学研究センター SPring-8利用研究課題選定委員会 主査／京都教育大学 教育学部 Department of Physics, Kyoto University of Education
姫路工業大学 高度産業科学技術研究所 Laboratory of Advanced Science and Technology (LASTI), Himeji Institute of Technology
- Abstract
- The commissioning of New SUBARU started in September 1998. The exahstive effort to store a beam in three months made it clear that the physical aperture of New SUBARU should be smaller than the designed size. The vacuum chamber was opend in the New Year's shut down. We found that the RF contact fingers in eight bellows at the each end of four insertion light sources were deformed. They have narrowed the physical aperture of the ring. The commissioning became much easier after the replacement of the fingers. The ring is now in operation for vacuum baking by synchrotronradiation.
東京都立大学大学院 理学研究科 Depatment of Physics, Tokyo Metropolitan University
東北大学 科学計測研究所 Research Institute for Scientific Measurements, Tohoku University
北海道大学大学院 理学研究科 Graduate School of Science, Hokkaido University
[1]（財）高輝度光科学研究センター ビームライン部門 JASRI Beamline Division、[2]理化学研究所・播磨研究所 RIKEN Harima Institute
日本原子力研究所 関西研究所 放射光利用研究部 Dept. of Synchrotron Radiation Facilities, JAERI Kansai Research Establishment
Call for the Beam Time Application for the Public Beamlines at SPring-8
3. 共用ビームライン／PUBLIC BEAMLINE
（財）高輝度光科学研究センター 放射光研究所 利用促進部門長 JASRI Experimental Facilities Promotion Division
工業技術院 電子技術総合研究所 電子基礎部 Physical Science Division, Electrotechnical Laboratory
（財）高輝度光科学研究センター 放射光研究所 実験部門 JASRI Experimental Research Division
(財)高輝度光科学研究センター 利用促進部門長 JASRI Experimental Facilities Promotion Division
[1]神戸大学大学院 自然科学研究科 Graduate School of Science and Technology, Kobe University 、[2](財)高輝度光科学研究センター 放射光研究所 ビームライン部門 JASRI Beamline Division
- Abstract
- BL43IR at SPring-8 is a beamline which covers a very wide wavelength region from 5000A to 100 µm and exclusively dedicated to infrared spectroscopy. The performance of advanced experiments which can not be carried out with small storage rings is expected. The beamline is now on construction so as to be opened to common users in the fiscal year of 2000.
[1]（財）高輝度光科学研究センター 利用促進部門 JASRI Experimental Facilities Promotion Division、[2]東北大学 科学計測研究所 Research Institute for Scientific Measurements, Tohoku University
日本原子力研究所 関西研究所 放射光利用研究部 Department of Synchrotron Radiation Research, Kansai Research Establishment, JAERI
[1]（財）高輝度光科学研究センター 利用促進部門 JASRI Experimental Facilities Division、[2]日本原子力研究所 JAERI Dep. of Synchrotron Radiation Facility Project
（財）高輝度光科学研究センター 利用促進部門 JASRI Experimental Facilities Promotion Division
[1]（財）高輝度光科学研究センター 利用促進部門 JASRI Experimental Facilities Promotion Division、[2]日本原子力研究所 関西研究所 放射光利用研究部 Dept. of Synchrotron Radiation Facilities, JAERI Kansai Research Establishment
（財）高輝度光科学研究センター 利用促進部門 JASRI Experimental Facilities Promotion Division
（財）高輝度光科学研究センター 利用促進部門 JASRI Experimental Facilities Promotion Division
（財）高輝度光科学研究センター 利用促進部門 JASRI Experimental Facilities Promotion Division
4. 最近の研究から／FROM LATEST RESEARCH
静岡理工科大学 物質科学科 Department of Materials Science, Shizuoka Institute of Science and Technology
- Abstract
- High energy XAFS studies of Sm : K-edge in Sm2Fe17Nx with x=0.0, 0.5, 1.07, 1.55, 1.85, 2.04 and 3.0 were carried out at room temperature. In the XANES region, we firstly found the change of the shape near the absorption edge jump. It was considered that this change was due to the change of the Sm electron state by nitriding. In the results of the Fourier transformation of the XAFS oscillations, it was supposed that the local structure of Sm atom also changed by nitriding.
[1]大阪大学核物理研究センターレーザー電子光グループ（大学共同研究グループ） LEPS Collaboration、[2]（財）高輝度光科学研究センター 放射光研究所 JASRI Research Sector
- Abstract
- BL33LEP is a contract beamline of the Research Center for Nuclear Physics (Osaka University) for investigating quark-nuclear physics. The first laser-electron-photon (LEP) beam was extracted into the optics hutch on July 1, 1999. The LEP beamline, experimental apparatus, results of LEP beam study, and the plan are described.
理化学研究所 X線干渉光学研究室 The Institute of Physical and Chemical Research (RIKEN)
日本電気㈱ 基礎研究所 Fundamental Research Laboratories, NEC Corporation
- Abstract
- Beamline BL16B2, together with its sister beamline BL16XU, is designed and constructed by an industrial consortium of 13 companies to characterize various materials developed for industrial purposes. The main experiments on this beamline are XAFS and X-ray topography, and in some cases X-ray diffraction and X-ray fluorescent analysis. The energy range from the titanium K-edge to the thulium K-edge is covered.
㈱日立製作所 基礎研究所 Advanced Research Laboratory, Hitachi, Ltd.
- Abstract
- Beamline BL16XU at SPring-8, together with its sister beamline BL16B2, was designed and constructed by an industrial consortium of 13 companies to characterize various materials developed for industrial purposes. The main experiments are fluorescence X-ray analysis and X-ray diffraction using X-ray beam of several tens-µm to sub-mm size. Optics for several-µm X-ray beam will also be available for characterization of sophisticated thin film devices and new fine structured materials.
理化学研究所 磁性研究室 Magnetic Materials Laboratory, The Institute of Physical and Chemical Research (RIKEN)
[1]日本原子力研究所 関西研究所 放射光利用研究部 Dept. of Synchrotron Radiation Facilities, JAERI Kansai Research Establishment、[2]（財）高輝度光科学研究センター 加速器部門 JASRI Accelerator Division
放射光利用研究促進機構 (財)高輝度光科学研究センター 企画調査部 Organization for the Promotion of Synchrotron Radiation Research JASRI Planning Division
放射光利用研究促進機構 (財)高輝度光科学研究センター 企画調査部
Organization for the Promotion of Synchrotron Radiation Research JASRI Planning Division
[1]姫路工業大学 理学部 Faculty of Science, Himeji Institute of Technology、[2]兵庫県立工業技術センター Hyogo Prefectural Institute of Industrial Research、[3]日本電信電話株式会社 Nippon Telegraph & Telephone Corporation、[4]（財）ひょうご科学技術協会 Hyogo Science & Technology Association
5. 最近の研究から／FROM LATEST RESEARCH
（財）高輝度光科学研究センター 放射光研究所 利用促進部門 JASRI Experimental Facilities Division
- Abstract
- In order to analyze the local structure of heterogeneous system, the 'capacitance-XAFS' by measuring the x-ray photon-energy dependence of the capacitance of a Schottky barrier diode is proposed. Since the capacitance is sensitive to the localized electron in the deep level, dropping of the electron into a core hole arising from X-ray absorption of the atom in the deep level, not the bulk atom, increases the capacitance. The site-selectivity of the capacitance XAFS is successfully applied to AlGaAs:Se system. Several applications of the capacitance-XAFS to heterogeneous system, such as the interface XAFS, are introduced.
京都大学大学院 理学研究科 Division of Chemistry, Graduate School of Science, Kyoto University
- Abstract
- Hydrogenases are enzymes which are responsible for the hydrogen metabolism in bacteria. The active site of the [NiFe] hydrogenase has been reported as a hetero binuclear Ni-Fe complex with four non-protein ligands. The Ni atom is coordinated by four sulfur atoms of cysteinyl residues, and two of them coordinate to the Fe atom making the bridges between two metal atoms. The four non-protein ligands of the [NiFe] hydrogenase from D. vulgaris Miyazaki F in the oxidized form were assigned as SO, CO, CN and S. In contrast, those in the hydrogenase from D. gigas were reported as CO, CN, CN and O. Recently we found that the hydrogenase of Miyazaki strain liberated H2S upon reduction with H2 in the presence of its electron carrier. The x-ray crystal structure of the H2-reduced form of the Miyazaki enzyme at 1.4 Å resolution was successfully solved and refined to a crystallographic R-factor of 21.8 %. Though the structure was almost identical to that of the oxidized form, the non-protein monatomic bridge which was observed between the Ni and Fe atoms in the oxidized form disappeared. Considering the experimental results mentioned above, we have concluded that the monatomic bridge ligand between the Ni and Fe atoms must not be a oxygen species but a sulfur species, and this ligand should be removed as H2S when the enzyme is activated upon reduction with H2. This sulfur bridging ligand may have an essential key role for the catalytic cycle of the [NiFe] hydrogenase.
広島大学 総合科学部 Faculty of Integrated Arts and Sciences, Hiroshima University
- Abstract
- Energy-dispersive X-ray diffraction measurements using synchrotron radiation at SPring-8 for expanded fluid Hg were carried out in the wide density range from the liquid to the vapour region including the metal-nonmetal (M-NM) transition region. Density ranges from 13.6 to 1.9 gcm-3. We obtained the structure factor S(k) and the pair distribution function g(r). The density variation of the obtained interatomic distance and coordination number were discussed in relation to the M-NM transition in fluid Hg.
（財）高輝度光科学研究センター 放射光研究所 実験部門 JASRI Experimental Research Division
大阪大学大学院 理学研究科 Division of Biological Sciences Graduate School of Science, Osaka University
名古屋大学大学院 工学研究科 Graduate School of Engineering, Nagoya University
岡山理科大学 総合情報学部 Faculty of Informatics, Okayama University of Science
6. 談話室・ユーザー便り／OPEN HOUSE･A LETTER FROM SPring-8 USERS
（財）高輝度光科学研究センタ− 技術支援方策検討委員会 委員長 姫路工業大学 理学部 Faculty of Science, Himeji Institute of Technology
（財）高輝度光科学研究センター 放射光研究所 ビームライン部門 JASRI Beamline Division、理化学研究所・播磨研究所 RIKEN Harima Institute
Deutsches Elektronen-Synchrotron (DESY)、Hamburger Synchrotronstrahlungslabor (HASYLAB)
大阪工業技術研究所・光機能材料部 Department of Optical Materials, Osaka National Research Institute
東京学芸大学 教育学部 物理学科 Physics, Faculty of Education, Tokyo Gakugei University
日本原子力研究所 関西研究所 放射光利用研究部 Dept. of Synchrotron Radiation Facilities, JAERI Kansai Research Establishment
（財）高輝度光科学研究センター 利用促進部門 JASRI Experimental Facilities Promotion Division
7. 告知板／ANNOUNCEMENTS
大阪大学大学院 基礎工学研究科 Graduate School of Engineering Science, Osaka University
東京大学 物性研究所 Institute for Solid State Physics, University of Tokyo
