301
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Takeuchi T, Chainani A, Takata Y, Tanaka Y, Oura M, Tsubota M, Senba Y, Ohashi H, Mochiku T, Hirata K, Shin S. An ultrahigh-vacuum apparatus for resonant diffraction experiments using soft x rays (hnu=300-2000 eV). THE REVIEW OF SCIENTIFIC INSTRUMENTS 2009; 80:023905. [PMID: 19256660 DOI: 10.1063/1.3078269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We have developed an ultrahigh-vacuum instrument for resonant diffraction experiments using polarized soft x rays in the energy range of hnu=300-2000 eV at beamline BL17SU of SPring-8. The diffractometer consists of modified differentially pumped rotary feedthroughs for theta-2theta stages, a sample manipulator with motor-controlled x-y-z-, tilt (chi)-, and azimuth (phi)-axes, and a liquid helium flow-type cryostat for temperature dependent measurements between 30 and 300 K. Test results indicate that the diffractometer exhibits high reproducibility (better than 0.001 degrees ) for a Bragg reflection of alpha-quartz 100 at a photon energy of hnu=1950 eV. Typical off- and on-resonance Bragg reflections in the energy range of 530-1950 eV could be measured using the apparatus. The results show that x-ray diffraction experiments with energy-, azimuth-, and incident photon polarization-dependence can be reliably measured using soft x rays in the energy range of approximately 300-2000 eV. The facility can be used for resonant diffraction experiments across the L-edge of transition metals, M-edge of lanthanides, and up to the Si K-edge of materials.
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302
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Matsunami M, Eguchi R, Kiss T, Horiba K, Chainani A, Taguchi M, Yamamoto K, Togashi T, Watanabe S, Wang XY, Chen CT, Senba Y, Ohashi H, Sugawara H, Sato H, Harima H, Shin S. Anomalous duality of 4f electrons in filled skutterudite CeOs4Sb12. PHYSICAL REVIEW LETTERS 2009; 102:036403. [PMID: 19257374 DOI: 10.1103/physrevlett.102.036403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2008] [Indexed: 05/27/2023]
Abstract
We study the electronic structure of the filled skutterudite CeOs4Sb12 using photoemission spectroscopy (PES). Soft x-ray excited Ce 3d-4f resonant PES confirms the existence of Ce 4f states at the Fermi level (EF). Temperature dependent high-resolution laser-PES spectra reveal a pseudogap formation around EF, which can be explained in terms of the hybridization gap. Simultaneously, a sharp feature is formed just above EF with decreasing temperature. The heavy-fermion-like specific heat is attributed to the occupation of this feature. The results identify the origin of the anomalous coexistence of heavy-fermion and pseudogap behavior in terms of a symmetry dependent hybridization.
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303
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Kanai K, Nishi T, Iwahashi T, Ouchi Y, Seki K, Harada Y, Shin S. Anomalous electronic structure of ionic liquids determined by soft x-ray emission spectroscopy: Contributions from the cations and anions to the occupied electronic structure. J Chem Phys 2008; 129:224507. [DOI: 10.1063/1.3036925] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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304
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Hashimoto M, Guo FZ, Suzuki M, Ueda M, Matsuoka Y, Kinoshita T, Kobayashi K, Shin S, Oura M, Takeuchi T, Saito Y, Matsushita T, Yasue T, Koshikawa T. Mapping of chemical bonding states of Ag/Si(111) with synchrotron radiation photo emission electron microscopy. SURF INTERFACE ANAL 2008. [DOI: 10.1002/sia.2988] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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305
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Takata Y, Kayanuma Y, Oshima S, Tanaka S, Yabashi M, Tamasaku K, Nishino Y, Matsunami M, Eguchi R, Chainani A, Oura M, Takeuchi T, Senba Y, Ohashi H, Shin S, Ishikawa T. Recoil effect of photoelectrons in the Fermi edge of simple metals. PHYSICAL REVIEW LETTERS 2008; 101:137601. [PMID: 18851493 DOI: 10.1103/physrevlett.101.137601] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2008] [Indexed: 05/26/2023]
Abstract
High energy resolution photoelectron spectroscopy of conduction electrons in the vicinity of the Fermi edge in Al and Au at excitation energies of 880 and 7940 eV was carried out using synchrotron radiation. For the excitation energy of 7940 eV, the observed Fermi energy of Al shows a remarkable shift to higher binding energy as compared with that of Au, with accompanying broadening. This is due to the recoil effect of the emitted photoelectrons. The observed spectra are well reproduced by a simple model of Bloch electrons based on the isotropic Debye model.
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306
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Novak V, Sadowski D, Schoonover K, Shin S, Abdel-Khalik S, Ghiaasiaan S. Heat transfer in two-component internal mist cooling. NUCLEAR ENGINEERING AND DESIGN 2008. [DOI: 10.1016/j.nucengdes.2008.03.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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307
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Chun D, Shin S, Chun N, Hong J, Kil H. 219. Bladder Puncture Associated With Caudal Block in a Pediatric Patient Underwent Hernioplasty. Reg Anesth Pain Med 2008. [DOI: 10.1136/rapm-00115550-200809001-00433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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308
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Kil H, Shin S, Chun N, Oh S, Song Y, Hong J. 225. Drug Spread Within the Extradural Space After Caudal Block in Children: Fluoroscopic Examination. Reg Anesth Pain Med 2008. [DOI: 10.1136/rapm-00115550-200809001-00039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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309
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Kil H, Shin S, Song Y, Oh S, Hong J. 222. An Alternative Approach to Caudal Block in Children: Comparison of the Sacral Intervertebral Approach and Sacral Hiatal Approach. Reg Anesth Pain Med 2008. [DOI: 10.1136/rapm-00115550-200809001-00008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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310
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Asencios L, Yale G, Yagui M, Quispe N, Taylor A, Blaya J, Contreras C, Cegielski P, Bayona J, Bonilla C, Shin S. Programmatic implementation of rapid DST for Mycobacterium tuberculosis in Peru. Int J Tuberc Lung Dis 2008; 12:743-749. [PMID: 18544198 PMCID: PMC8324024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Abstract
BACKGROUND Performance characteristics of novel rapid drug susceptibility tests (DST) for Mycobacterium tuberculosis may change when moving from research to implementation in actual public health practice. We describe the performance characteristics of a direct, rapid DST when implemented in Lima, Peru. METHODS A district laboratory validated conventional proportions and nitrate reductase methods. We collected data on samples submitted for DST from January 2005 to June 2007 and calculated frequency of testing and results, and median time to test results. RESULTS A total of 4102 DSTs were performed by conventional DST and 895 by nitrate reductase. Results were obtained from 72.8% of samples by conventional DST and from 70.2% of those processed by Griess; respectively 26.4% and 31.5% were multidrug-resistant tuberculosis. The median time from sample collection to test result was 31 days for Griess vs. 99 days for conventional DST. CONCLUSIONS Preliminary experience with the Griess method demonstrates favorable performance under program conditions.
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311
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Pettersson LGM, Tokushima T, Harada Y, Takahashi O, Shin S, Nilsson A. Comment on "Isotope and temperature effects in liquid water probed by X-ray absorption and resonant -ray emission spectroscopy". PHYSICAL REVIEW LETTERS 2008; 100:249801; author reply 249802. [PMID: 18643637 DOI: 10.1103/physrevlett.100.249801] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2008] [Indexed: 05/23/2023]
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312
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Taguchi M, Matsunami M, Ishida Y, Eguchi R, Chainani A, Takata Y, Yabashi M, Tamasaku K, Nishino Y, Ishikawa T, Senba Y, Ohashi H, Shin S. Revisiting the valence-band and core-level photoemission spectra of NiO. PHYSICAL REVIEW LETTERS 2008; 100:206401. [PMID: 18518558 DOI: 10.1103/physrevlett.100.206401] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2007] [Indexed: 05/26/2023]
Abstract
We have reexamined the valence-band (VB) and core-level electronic structure of NiO by means of hard and soft x-ray photoemission spectroscopies. The spectral weight of the lowest energy state was found to be enhanced in the bulk sensitive Ni 2p core-level spectrum. A configuration-interaction model including a bound state screening has shown agreement with the core-level spectrum and off- and on-resonance VB spectra. These results identify the lowest energy states in the core-level and VB spectra as the Zhang-Rice (ZR) doublet bound states, consistent with the spin-fermion model and recent ab initio calculations within dynamical mean-field theory. The results indicate that the ZR character first ionization (the lowest hole-addition) states are responsible for transport properties in NiO and doped NiO.
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313
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Lee D, Kim S, Park K, Kim J, Lee J, Shin S, Kang J, Suh C, Ahn M, Ahn J. A randomized open-label study of gefitinib versus docetaxel in patients with advanced/metastatic non-small cell lung cancer (NSCLC) who have previously received platinum-based chemotherapy. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.8025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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314
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Kim J, Choi S, Lee M, Hyun I, Hur Y, Kim H, Shin Y, Shin S, Kim Y, Kim C. Prognostic prediction and preoperative staging of F-18-fluorodeoxyglucose (FDG) positron emission tomography (PET) in patients with gastric cancer. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.15530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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315
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Hong S, Shin S, Im C, Jeung H, Rha S, Chung H, Roh J, Lee S, Ryoo H, Ahn J. Adjuvant 5-fluorouracil and leucovorin with or without OK-432 in colorectal cancer: A single-institutional study of long-term follow-up. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.15128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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316
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Shin S, Park Y, Kim T, Oh D, Shim B, Lee K, Lee M, Kim Y, Kim Y, Ahn J. Multicenter phase II trial of S-1 as first-line treatment in elderly patients with metastatic or recurrent unresectable colorectal cancer. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.15057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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317
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Im C, Jung H, Rha S, Ahn J, Shin S, Noh S, Roh J, Chung H. Comparison of taxane-based (docetaxel or paclitaxel) regimens combined with 5-fluorouracil continuous infusion and low dose leucovorin for advanced gastric carcinoma: Analysis of two phase II trials. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.15679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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318
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Baek J, Shin S, Kim M, Kim D, Kim G, Cho H, Park J, Min Y. Characteristics of patients with early gastric cancer who had undergone surgery in single institute. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.15535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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319
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Jeong J, Cho B, Choi H, Shin S, Lee Y, Kim S, Sohn J, Kim J. Phase II trial of belotecan in patients with sensitive relapsed small-cell lung cancer after irinotecan-containing chemotherapy. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.8118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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320
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Jeung H, Im C, Rha S, Ahn J, Shin S, Noh S, Roh J, Chung H. A randomized phase II trial of docetaxel plus S-1 versus docetaxel plus cisplatin in advanced gastric cancer as a first-line treatment. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.4534] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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321
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Ishizaka K, Eguchi R, Tsuda S, Chainani A, Yokoya T, Kiss T, Shimojima T, Togashi T, Watanabe S, Chen CT, Takano Y, Nagao M, Sakaguchi I, Takenouchi T, Kawarada H, Shin S. Temperature-dependent localized excitations of doped carriers in superconducting diamond. PHYSICAL REVIEW LETTERS 2008; 100:166402. [PMID: 18518227 DOI: 10.1103/physrevlett.100.166402] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2007] [Indexed: 05/26/2023]
Abstract
Laser-excited photoemission spectroscopy is used to show that the doped carriers in metallic or superconducting diamond couple strongly to the lattice via high-energy (approximately 150 meV) optical phonons, with direct observations of localized Franck-Condon multiphonon sidebands appearing as Fermi-edge replicas. It exhibits a temperature-dependent spectral weight transfer from higher to lower energy sidebands and zero-phonon Fermi-edge states. The quantified coupling strength shows a systematic increase on lowering temperature, implicating its relation to the normal state transport and superconductivity.
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322
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Wang Y, Cho J, Chen Y, Yoo J, Kim H, Huang Y, Shin S, Zhou T, Kim I. Effect of dietary soyabean hulls and metal-amino
acid chelated mineral supplementation on growth
performance, nutrient digestibility and noxious gas
emission in growing pigs. JOURNAL OF ANIMAL AND FEED SCIENCES 2008. [DOI: 10.22358/jafs/66597/2008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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323
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Chen Y, Kim I, Cho J, Yoo J, Kim H, Shin S. Utilization of δ-aminolevulinic acid for livestock:
blood characteristics and immune organ weight in
broilers. JOURNAL OF ANIMAL AND FEED SCIENCES 2008. [DOI: 10.22358/jafs/66601/2008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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324
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Kim ES, Song JS, Lee HJ, Choe PG, Park KH, Cho JH, Park WB, Kim SH, Bang JH, Kim DM, Park KU, Shin S, Lee MS, Choi HJ, Kim NJ, Kim EC, Oh MD, Kim HB, Choe KW. A survey of community-associated methicillin-resistant Staphylococcus aureus in Korea. J Antimicrob Chemother 2008. [DOI: 10.1093/jac/dkn171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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325
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Kiss T, Shimojima T, Ishizaka K, Chainani A, Togashi T, Kanai T, Wang XY, Chen CT, Watanabe S, Shin S. A versatile system for ultrahigh resolution, low temperature, and polarization dependent laser-angle-resolved photoemission spectroscopy. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:023106. [PMID: 18315282 DOI: 10.1063/1.2839010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We have developed a low temperature ultrahigh resolution system for polarization dependent angle-resolved photoemission spectroscopy (ARPES) using a vacuum ultraviolet (vuv) laser (hnu=6.994 eV) as a photon source. With the aim of addressing low energy physics, we show the system performance with angle-integrated PES at the highest energy resolution of 360 mueV and the lowest temperature of 2.9 K. We describe the importance of a multiple-thermal-shield design for achieving the low temperature, which allows a clear measurement of the superconducting gap of tantalum metal with a T(c)=4.5 K. The unique specifications and quality of the laser source (narrow linewidth of 260 mueV, high photon flux), combined with a half-wave plate, facilitates ultrahigh energy and momentum resolution polarization dependent ARPES. We demonstrate the use of s- and p-polarized laser-ARPESs in studying the superconducting gap on bilayer-split bands of a high T(c) cuprate. The unique features of the quasi-continuous-wave vuv laser and low temperature enables ultrahigh-energy and -momentum resolution studies of the spectral function of a solid with large escape depth. We hope the present work helps in defining polarization dependent laser excited angle-resolved photoemission spectroscopy as a frontier tool for the study of electronic structure and properties of materials at the sub-meV energy scale.
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