坂田　誠　SAKATA Makoto^[1]、西堀　英治　NISHIBORI Eiji^[1]、青柳　忍　AOYAGI Shinobu^[1]、黒岩　芳弘　KUROIWA Yoshihiro^[2]、久保田　佳基　KUBOTA Yoshiki^[3]、高田　昌樹　TAKATA Masaki^[4]、加藤　健一　KATO Kenichi^[4]

^[1]名古屋大学大学院　工学研究科　Graduate School of Engineering, Nagoya University、^[2]岡山大学大学院　自然科学研究科／CREST (JST)　Graduate School of Natural Science and Technology, Okayama University / CREST (JST)、^[3]大阪府立大学大学院　理学系研究科　Graduate School of Science, Osaka Prefecture University、^[4]（財）高輝度光科学研究センター　利用研究促進部門／CREST (JST)　Research & Utilization Division, JASRI / CREST (JST)

Pages 191 -193 Download PDF (81.85 KB)

2004年度共用ビームライン評価委員会の報告概要
Report of the Public Beamline Review Committees in 2004

下村　理　SHIMOMURA Osamu

（財）高輝度光科学研究センター　研究調整部　Research Coordination Division, JASRI

Pages 235 - 239 Download PDF (25.80 KB)

ナノビームによる細胞選択的元素測定〜精子に取り込まれた微量スズの検出に世界で初めて成功〜
Cell-selective Determination of Trace Elements in Testis by SR-XRF Analysis with Nanoprobe

武田（本間）志乃　HOMMA-TAKEDA Shino^[1]、西村　義一　NISHIMURA Yoshikazu^[1]、渡辺　嘉人　WATANABE Yoshito^[1]、湯川　雅枝　YUKAWA Masae^[1]、上野　俊治　UENO Shunji^[2]、寺田　靖子　TERADA Yasuko^[3]

^[1]放射線医学総合研究所　National Institute of Radiological Sciences、^[2]北里大学　獣医畜産学部　Kitasato University, School of Veterinary Medicine & Animal Sciences、^[3]（財）高輝度光科学研究センター　JASRI

Abstract: Organotin compounds are widely used in industry and its environmental contamination by these compounds has recently become a concern. It is known that they act as endocrine disruptors but details of the dynamics of Sn in reproductive organs are still unknown. In the present study, we attempted to determine Sn in the testis of rats exposed to tributyltin chloride (TBTC) cell-selectively by synchrotron radiation X-ray florescence analysis with nanoprobe. TBTC was orally administered to rats at a dose of 45 µmol/kg per day for 3 days. One day later, Sn was detected in spermatozoa at the stage VIII seminiferous tubule, which are the final step of spermatogenesis in the testis. Sn levels in the microdissectioned seminiferous tubules determined by inductively coupled argon plasma-mass spectrometry were approximately equivalent to that in the testis. These data indicate that Sn accumulates in germ cells as well as in spermatozoa in a short period of TBTC exposure.

Pages342 - 345 Download PDF (192.66 KB)

低温・強磁場下における放射光X線回折測定
Synchrotron X-ray Diffraction Studies under High Magnetic Fields and Low Temperatures

勝又　紘一　KATSUMATA Koichi

（独）理化学研究所　播磨研究所　Harima Institute, RIKEN

Abstract: Diffraction studies of magnetic materials subjected to extreme conditions are illustrated with observations made by non-resonant X-ray diffraction, using beam-line BL19LXU at SPring-8, on materials held in high magnetic fields and low temperatures. The first observation is that of a giant magneto-volume effect in solid oxygen. From this finding, we confirm that magnetic interactions between oxygen molecules are a vital ingredient in determining the crystal structure. A second example is the determination of the high-field phase of a spin-Peierls system CuGeO₃. The X-ray diffraction pattern was measured in a magnetic field, H, up to 15 T. We find that the temperature dependence of the incommensurate peak is quite different at lower H from that at higher H, which is interpreted as stabilization of the incommensurate state by suppression of thermal fluctuations that is brought about by application of a magnetic field. The third example entails diffraction measurements on a sample held at a very low temperature. We observed a jump in the lattice constant of the ladder-like compound Cu₂(C₅H₁₂N₂)₂Cl₄ at about 40 mK associated with the field-induced magnetic ordering from the non-magnetic spin-liquid state. This is the first experimental confirmation of the theoretical prediction on the generalized spin-Peierls phenomenon in quantum magnets. Finally, future prospects are given.

Pages 346 - 350 Download PDF (222.51 KB)

生体分子の軟X線円二色性の初測定
First Observation of Soft X-ray Circular Dichroism for Biomolecules

中川　和道　NAKAGAWA Kazumichi

神戸大学　発達科学部　Faculty of Human Development, kobe University

Abstract: Circular dichroism spectra of evaporated films of two amino acids (Phenylalanine and Serine) were measured at the soft X-ray energy region for the first time. Magnitude of signal was 0.1 % of the absorption coefficient. Asymmetric reaction will be explored from a view point of origin of life.

Pages 351 - 354 Download PDF (132.33 KB)

放射光で高温超伝導の発現機構解明に迫る
−室温超伝導体は作れるのか−
A Step Towards Understanding the Mechanism of High TC Superconductors – Possible to be Superconducting at Room Temperature? –

福田　竜生　FUKUDA Tatsuo^[1]、水木　純一郎　MIZUKI Jun’ichiro^[1]、池内　和彦　IKEUCHI Kazuhiko^[2]、山田　和芳　YAMADA Kazuyoshi^[2]、Alfred Q. R. Baron^[3]、筒井　智嗣　TSUTSUI Satoshi^[3]

^[1]（独）日本原子力研究開発機構　量子ビーム応用研究部門　Quantum Beam Science Directorate, Japan Atomic Energy Agancy、^[2]東北大学　金属材料研究所　Institute for Materials Research, Tohoku University、^[3]（財）高輝度光科学研究センター　利用研究促進部門　Research & Utilization Division, JASRI

Pages 377 -381 Download PDF (285.00 KB)

元素選択磁化測定による有機分子被覆金ナノ微粒子の強磁性の観測
Direct Observation of Ferromagnetic Spin Polarization in Au Nanoparticles by Element Specific Magnetization Measurement

山本　良之　YAMAMOTO Yoshiyuki、堀　秀信　HORI Hidenobu

北陸先端科学技術大学院大学　材料科学研究科　School of Materials Science, Japan Advanced Institute of Science and Technology

Abstract: Gold shows diamagnetic property in the bulk state. However, this property might be different in the nano-sized region because the electronic structure may be modified significantly. This article reports the first direct observation of ferromagnetic spin polarization of Au nanoparticles with a mean diameter of 1.9 nm using X-ray magnetic circular dichroism (XMCD). Owing to the element selectivity of XMCD, only the gold magnetization is explored. Magnetization of gold atoms estimated by XMCD shows a good agreement with the results obtained by conventional magnetometry. This result is evidence of intrinsic spin polarization in nano-sized gold.

Pages 19 - 23 Download PDF (147.71 KB)

多孔性配位高分子のナノ細孔に吸着した水素分子の直接観測
Direct observation of hydrogen molecules adsorbed in a microporous coordination polymer

久保田　佳基　KUBOTA Yoshiki^[1]、高田　昌樹　TAKATA Masaki^[2]、北川　進　KITAGAWA Susumu^[3]、加藤　健一　KATO Kenichi^[4]、小林　達生　KOBAYASHI Tatsuo^[5]、坂田　誠　SAKATA Makoto^[6]

^[1]大阪女子大学　理学部　Department of Environmental Sciences, Osaka Women’s University、^[2]（財）高輝度光科学研究センター　利用研究促進部門Ⅰ／CREST (JST)　Materials Science Division, JASRI / CREST、^[3]京都大学大学院　工学研究科　Department of Synthetic Chemistry and Biological Chemistry, Kyoto University、^[4]（財）高輝度光科学研究センター　利用研究促進部門Ⅰ／CREST (JST)、Materials Science Division, JASRI / CREST、^[5]岡山大学　理学部　Department of Physics, Okayama University、^[6]名古屋大学大学院　工学研究科　Department of Applied Physics, Nagoya University

Abstract: Hydrogen storage is one of the most important technologies, which is indispensable for the establishment of clean hydrogen energy system. Adsorption of H₂ molecules in the metal-organic porous materials is one of the most promising candidates to store and release H₂ molecules efficiently. To develop a rational synthetic strategy for novel metal-organic porous materials as hydrogen storages, the elucidation of the intermolecular interaction between H₂ molecules and pore walls is essential and the fundamental structural characteristics of H₂ molecules are required. Although the weakest X-ray scattering amplitude of hydrogen made it difficult to determine the structure, we have succeeded in direct observation of H₂ molecules adsorbed in the nano-channels of the metal-organic porous material by in-situ synchrotron powder diffraction experiment of gas adsorption and MEM(maximum entropy method)/Rietveld analysis. The result could give us promising guidelines for designing hydrogen gas storage materials.

Pages 24 -29 Download PDF (93.21 KB)

SPring-8ナノテクノロジー総合支援のためのPEEM導入と立ち上げ

小林　啓介　KOBAYASHI Keisuke、郭　方准　GUO Fang Zhun、脇田　高徳　WAKITA Takanori、木下　豊彦　KINOSHITA Toyohiko

（財）高輝度光科学研究センター利用研究促進部門Ⅰ　Materials Science Division, JASRI

Pages 112 - 119 Download PDF (393.68 KB)

3. 研究会等報告／WORKSHOP AND COMMITTEE REPORT

第9回3極ワークショップ開催報告
The 9th SPring-8, ESRF, APS Workshop

高田　昌樹　TAKATA Masaki

（財）高輝度光科学研究センター　利用研究促進部門Ⅰ　Materials Science Division, JASRI

Pages 30 - 34 Download PDF (70.49 KB)

2001Bに採択され2004Aで終了した長期利用課題の研究紹介
Outline of Long-term Proposal (2001B-2004A)

（財）高輝度光科学研究センター　利用業務部　User Administration Division, JASRI

Page 194 Download PDF (362.59 KB)

高分解能軟X線によるバルク敏感な角度積分・角度分解光電子分光の新展開
New Frontier Opened by Bulk Sensitive Angle-Integrated and – Resolved Photoelectron Spectroscopy with Use of High Resolution Soft X-ray

菅　滋正　SUGA Shigemasa

大阪大学大学院　基礎工学研究科　Graduate School of Engineering Science, Osaka University

Pages 194 - 199 Download PDF (362.59 KB)

2001Aに採択され2003Bで終了した長期利用課題の研究紹介（2）
Outline of Long-term Proposal (2001A-2003B)

（財）高輝度光科学研究センター　利用業務部　User Administration Division, JASRI

Page 240 Download PDF (511.90 KB)

高圧下における実験的精密構造物性研究手法の開発
The development of charge density level structure analysis method under high pressure.

高田　昌樹　TAKATA Masaki

（財）高輝度光科学研究センター　利用研究促進部門　Research & Utilization Division, JASRI

Pages 240 - 249 Download PDF (511.90 KB)

第9回SPring-8シンポジウム開催について
The 9th SPring-8 Symposium

Page 355 Download PDF (11.84 KB)

実験用低温容器の破損に関する報告書
A Technical Report on the Burst of a Cryostat

Pages 356 - 361 Download PDF (214.52 KB)

SPring-8における供用方針の変更（消耗品の実費負担等）について

Page 362 Download PDF (14.18 KB)

准主任研究員公募

Page 363 Download PDF (15.51 KB)

平成17年度先端大型研究施設戦略活用プログラム緊急実施型利用について

Page 364 Download PDF (14.20 KB)

「SPring-8利用者情報」送付先登録票
“SPring-8 Information” Subscription Request Form

産業利用成果発表会報告
Symposium Report on Industrial Applications

廣沢　一郎　HIROSAWA Ichiro

（財）高輝度光科学研究センター　産業利用推進室　Industrial Application Division, JASRI

Pages 382 -383 Download PDF (33.69 KB)

3rd International Workshop on Radiation Safety of Synchrotron Radiation Sources (Radsynch’04)

浅野　芳裕　ASANO Yoshihiro

日本原子力研究所　放射光科学研究センター／（財）高輝度光科学研究センター　Synchrotron Radiation Research Center, JAERI / JASRI

Pages 35 - 38 Download PDF (70.33 KB)

カルシウムポンプのイオン輸送機構の構造的解明

豊島　近　TOYOSHIMA Chikashi

東京大学　分子細胞生物学研究所　Institute of Molecular and Cellular Biosciences, The University of Tokyo

Abstract: Calcium ATPase is an ATP-powered calcium pump and the best studied member of the P-type ion-transporting ATPases. Its crystal structures have been determined using SPring-8 for 5 different states that cover the whole reaction cycle. These structures show how the ion pump works and reveal what ATP and phosphorylation do.

Pages 120 - 124 Download PDF (242.96 KB)