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  • Welcom to UVSOR

What New

   Last December we celebrated the 30th anniversary of the first light at the UVSOR Facility, the Institute for Molecular Science. We are deeply grateful to many people who are continuously guiding and supporting us throughout these 30 years and of course to all the users who have fully utilized our systems for their scientific achievements.
   The present status of the UVSOR-III light source is marked by progress in lowering of the electron beam emittance and installation of beamline undulators. At present, all at the UVSOR facility stand united in their dedication to further heightening and stabilization of the light-source brilliance and to molecular science application using 6 advanced undulator beamlines with increasing overseas users. A scanning transmission X-ray microscope installed on BL4U, which was completed last year, is quite successfully in operation and an angle-, spin-, and space-resolved photoelectron spectrometer on BL5U is now under construction.

UVSOR Facility

   Light is called with various names such as infrared, visible, ultraviolet, vacuum-ultraviolet and X-ray, depending on its wavelength. A synchrotron light source is capable of producing light in the ultra-wide wavelength range from infrared to X-rays. Synchrotron light radiated by high energy electrons traveling in a strong magnetic field is intense and highly collimated. It is widely used in various research fields including molecular science. In IMS, a synchrotron light source has been operational since 1983. After several upgrades, it is still brightest in the world among low energy synchrotron light sources. By utilizing its excellent performance, the electronic structure that is the origin of the functionalities of solids is directly observed. This facility is called UVSOR and is used by many researchers not only from our country but also from foreign countries.

UVSOR Facility Image 01

Three-dimensional angle-resolved photoemission (3D-ARPES) apparatus.

UVSOR Facility Image 01

Fermi surface of a solid (CeSb) derived by 3D-ARPES apparatus.

Recent Research Papers

S. Hosokawa, K. Matsuki, K. Tamaru, Y. Oshino, H. Aritani, H. Asakura, K. Teramura and T. Tanaka
"Selective reduction of NO over Cu/Al2O3: Enhanced catalytic activity by infinitesimal loading of Rh on Cu/Al2O3", Mol. Catal. 442 (2017) 74.
T. Kaneyasu, Y. Hikosaka, M. Fujimoto, H. Iwayama, M. Hosaka, E. Shigemasa and M. Katoh
"Observation of an optical vortex beam from a helical undulator in the XUV region", J. Synchrotron Rad. 24 (2017) 934.
H. Suga, S. Kikuchi, Y. Takeichi, C. Miyamoto, M. Miyahara, S. Mitsunobu, T. Ohigashi, K. Mase, K. Ono and Y. Talahashi
"Spatially Resolved Distribution of Fe Species around Microbes at the Submicron Scale in Natural Bacteriogenic Iron Oxides", Micribes Environ. (2017).
F. Bussolotti, J. Yang, T. Yamaguchi, K. Yonezawa, K. Sato, M. Matsunami, K. Tanaka, Y. Nakayama, H. Ishii, N. Ueno and S. Kera
"Hole-phonon coupling effect on the band dispersion of organic molecular semiconductors", Nature Commun. 8 (2017).
T. Hirahara, S. V. Eremeev, T. Shirasawa, Y. Okuyama, T. Kubo, R. Nakanishi, R. Akiyama, A. Takayama, T. Hajiri, S. Ideta, M. Matsunami, K. Sumida, K. Miyamoto, Y. Takagi, K. Tanaka, T. Okuda, T. Yokoyama, S. Kimura, S. Hasegawa and E. V. Chulkov
"Large-Gap Magnetic Topological Heterostructure Formed by Subsurface Incorporation of a Ferromagnetic Layer", Nano Lettrs 17 (2017) 3493.
H. Oinuma, S. Souma, D. Takane,1 T. Nakamura, K. Nakayama, T. Mitsuhashi, K. Horiba, H. Kumigashira, M. Yoshida, A. Ochiai, T. Takahashi and T. Sato
"Three-dimensional Band Structure of LaSb and CeSb: Absence of Band Inversion", Phys. Rev. B 96 (2017) 041120.
M. Katoh, M. Fujimoto, N. S. Mirian, T. Konomi, Y. Taira, T. Kaneyasu, M. Hosaka, N. Yamamoto, A. Mochihashi, Y. Takashima, K. Kuroda, A. Miyamoto, K. Miyamoto and S. Sasaki
"Helical Phase Structure of Radiation from an Electron in Circular Motion", SCIENTIFC REPORTS 7 (2017).
A. Hara and T. Awano
"Ground-state Splitting of Ultrashallow Thermal Donors with Negative Central-cell Corrections in Silicon ",Jpn. Appl. Phys. 56 (2017) 068001.
A. Ito, T. Inoue, M. Kado, T. Ohigashi, S. Tone and K. Shinohara
"Biomedical Application of Soft X-ray Microscopy with Special Reference to Spectromicroscopy", A. Phys. Pol. A, 129 (2016) 260.
H. Yamane and N. Kosugi
"Site-Specific Organic/Metal Interaction Revealed from Shockley-Type Interface State", J. Phys. Chem. C, 120 (2016) 24307.
J. Ueda, A. Meijerink, P. Dorenbos, A. J. J. Bos and S. Tanabe
"Thermal Ionization and Thermally Activated Crossover Quenching Processes for 5d-4f Luminescence in Y3Al5-xGaxO12:Pr3+", Phys. Rev. B, 95 (2017) 014303.
T. Moromoto, M. Harima, Y. Hori and Y. Ohki
"Involvement of Crystallinity in Various Luminescent Bands in Yttrium Aluminate", Nucl. Instrum. Methods Phys. Res. B, 366 (2016) 198.
T. Moromoto, Y. Kuroda and Y. Ohki
"Electronic Excitation and Relaxation Processes of Oxygen Vacancies in YSZ and their Involvement in Photoluminescence", Appl. Phys. A (2016) 122:790.
M. Koshimizu, T. Yanagida, Y. Fujimoto and K. Asai
"Luminescence Properties of Gd2Si2O7:Ce and Gd2Si2O7:La, Ce under Vacuum Ultraviolet Irradiation", J. Rare Earths 34 (2016) 782.
D. Nakauchi, G. Okada, M. Koshimizu and T. Yanagida
"Evaluation of Ce:SrAl2O4 Crystalline Scintillators", Nucl. Instrum. Methods Phys. Res. B 377 (2016) 89.
M. Katoh, M. Fujimoto, H. Kawaguchi, K. Tsuchiya, K. Ohmi, T. Kaneyasu, Y. Taira, M. Hosaka, A. Mochihashi and Y. Takashima
Angular Momentum of Twisted Radiation from an Electron in Spiral Motion", Phys. Rev. Lett. 118 (2017) 094801.
Y. Nakayama, Y. Mizuno, M. Hikasa, M. Yamamoto, M. Matsunami, S. Ideta, K. Tanaka, H. Ishii and N. Ueno
Single-Crystal Pentacene Valence-Band Dispersion and Its Temperature Dependence", J. Phys. Chem. Lett. 8 (2017) 1259.
Y. Hikosaka, R. Mashiko, Y. Konosu, K. Soejima and E. Shigemasa
Electron Emission Relevant to Inner-Shell Photoionization of Condensed Water Studied by Multi-Electron Coincidence Spectroscopy", J. Electron Spectrosc. Relat. Phenom. 213 (2016) 17.
S. Nagaoka, T. Kakiuchi, J. Ohshita, O. Takahashi and Y. Hikosaka
"Site-Specific Electron-Relaxation Caused by Si:2p Core-Level Photoionization: Comparison between F3SiCH2CH2Si(CH3)3 and Cl3SiCH2CH2Si(CH3)3 Vapors by Means of Photoelectron Auger Electron Coincidence Spectroscopy", J. Phys. Chem. A 120 (2016) 9907.
T. Kaneyasu, Y. Hikosaka, M. Fujimoto, T. Konomi, M. Katoh, H. Iwayama and E. Shigemasa
"Limitations in Photoionization of Helium by an Extreme Ultraviolet Optical Vortex", Phys. Rev. A 95 (2017) 023413.
M. Yoshida, Onishi, Y. Mitsutomi, F. Yamamoto, M. Nagasaka, H. Yuzawa, N. Kosugi and H. Kondoh
"Integration of Active Nickel Oxide Clusters by Amino Acids for Water Oxidation", J. Phys. Chem. C 121 (2017) 255.
Y. Okuyama, Y. Sugiyama, S. Ideta, K. Tanaka and T. Hirahara
"Growth and atomic structure of tellurium thin films grown on Bi2Te3", Appl. Surf. Sci. 398 (2017) 125.
K. Yamamoto, A. Klossek, R. Flesch, T. Ohigashi, E. Fleige, F. Rancand, J. Frombach, A. Vogt, U. Blume-Peytavi, P. Schrade, S. Bachmanne, R. Haag, S. Hedtrichf, M. Schäfer-Korting, N. Kosugi, E. Rühl
"Core-multishell nanocarriers: Transport and release of dexamethasone probed by soft X-ray spectromicroscopy", J. Control. Release (2016).
K. Hagiwara, Y. Ohtsubo, M. Matsunami, S. Ideta, K. Tanaka, H. Miyazaki, J. E. Rault, P. Le Fèvre, F. Bertran, A. Taleb-Ibrahimi, R. Yukawa, M. Kobayashi, K. Horiba, H. Kumigashira, K. Sumida, T. Okuda, F. Iga, S. Kimura
"Surface Kondo effect and non-trivial metallic state of the Kondo insulator YbB12", Nat. Commun. 7, 12690 (2016).
Ming-Wei Lin, Kuo-Chin Wang, Jeng-Han Wang, Ming-Hsien Li, Yu-Ling Lai, T. Ohigashi, N. Kosugi, Peter Chen, Der-Hsin Wei, Tzung-Fang Guo and Yao-Jane Hsu
"Improve Hole Collection by Interfacial Chemical Redox Reaction at a Mesoscopic NiO/CH3NH3PbI3 Heterojunction for Efficient Photovoltaic Cells", Adv. Mater. Interface (2016) 1600135.
P. Ayria, S. Tanaka, Ahmad R. T. Nugraha, Mildred S. Dresselhaus and R. Saito
"Phonon-assisted Indirect Transitions in Angle-resolved Photoemission Spectra of Graphite and Graphene", Phys. Rev. B 94 (2016) 075429.
H.Iwayama, T. Kaneyasu, Y. Hikosaka and E. Shigemasa
"Stability and Dissociation Dynamics of N2++ Ions Following Core Ionization Studied by an Auger-electron–photoion Coincidence Method", J. Chem. Phys. 145 (2016) 034305.
T. Ohigashi, M. Nagasaka, T. Horigome, N. Kosugi, S. M. Rosendahl and A. P. Hitchcock
"Development of In-situ Sample Cells for Scanning Transmission X-ray Microscopy", AIP Conf. Proc. 1741 (2016) 050002.
S. Kimura, Y. S. Kwon, Y. Matsumoto, H. Aoki and O. Sakai
"Optical Evidence of Itinerant-Localized Crossover of 4f Electrons in Cerium Compounds", J. Phys. Soc. Japan 85 (2016) 083702.
T. Horiai, S. Kurosawa, R. Murakami, J. Pejchal, A. Yamaji, Y. Shoji, V. I. Chani, Y. Ohashi, K. Kamada, Y. Yokota and A. Yoshikawa
"Crystal Growth and Luminescence Properties of Yb2Si2O7 Infra-red Emission Scintillator", Optical Materials, 58 (2016) 14.
C. X. Trang, Z. Wang, D. Takane, K. Nakayama, S. Souma, T. Sato, T. Takahashi, A. A. Taskin and Y. Ando
"Fermiology of Possible Topological Superconductor Tl0.5Bi2Te3 Derived from Hole-doped Topological Insulator", Phys. Rev. B, 93 (2016) 241103.
T. Senden, A. Meijerink
"The d-f luminescence of Eu2+, Ce3+ and Yb2+ ions in Cs2MP2O7 (M=Ca2+, Sr2+)", J. Lumi. 177 (2016)254.
E. Tsuda, Y. Mitsumoto, K. Takakura1, N. Sunaga, T. Akitsu, T. Konomi and M. Katoh
"Electrochemical Tuning by Polarized UV Light Induced Molecular Orientation of Chiral Salen-type Mn(II) and Co(II) Complexes in an Albumin Matrix", J. Chem. Chem. Eng. 2 (2016) 53.
H. Zen, Y. Taira, T. Konomi, T. Hayakawa, T. Shizuma, J. Yamazaki, T. Kii, H. Toyokawa, M. Katoh and H. Ohgaki
"Generation of High Energy Gamma-ray by Laser Compton Scattering of 1.94-mm Fiber Laser in UVSOR-III Electron Storage Ring", Energy Procedia 89 (2016) 335.
M. Kitaura, K. Kamada, S. Kurosawa, J. Azuma, A. Ohnishi, A. Yamaji and K. Hara
"Probing Shallow Electron Traps in Cerium-doped Gd3Al2Ga3O12 Scintillators by UV-induced Absorption Spectroscopy", Appl. Phys. Express, 9 (2016) 072602.
S. Souma, Z. Wang, H. Kotaka, T. Sato, K. Nakayama, Y. Tanaka, H. Kimizuka, T. Takahashi, K. Yamauchi, T. Oguchi, K. Segawa and Y. Ando
"Direct Observation of Nonequivalent Fermi-arc States of Opposite Surfaces in the Noncentrosymmetric Weyl Semimetal NbP", Phys. Rev. B, 93 (2016) 161112(R).
T. Kaneyasu, M. Ito, K. Soejima, Y. Hikosaka and E. Shigemasa
"Site-Specific Formation of Metastable OCS2+ Studied by Auger-Electron-Ion Coincidence Method", J. Phys. B, 48 (2015) 125101.
S. Mitsunobu, M. Zhu, Y. Takeichi, T. Ohigashi, H. Suga, M. Jinno, H. Makita, M. Sakata, K. Ono, K. Mase and Y. Takahashi
"Direct Detection of Fe(II) in Extracellular Polymeric Substances (EPS) at the Mineral-Microbe Interface in Bacterial Pyrite Leaching", Microbes and Environments, 31 (2016) 63.
H. Yagi, T. Miyazaki, S. Okita, T. Zaima, H. Okimoto, N. Izumi, Y. Nakanishi, H. Shinohara and S. Hino
"Ultraviolet photoelectron spectra of Sc3C2@C80", Chem. Phys. Lett., 643 (2015) 98.
T. Hirahara, T. Shirai, T. Hajiri, M. Matsunami, K. Tanaka, S. Kimura, S. Hasegawa and K. Kobayashi
"Role of Quantum and Surface-State Effects in the Bulk Fermi-Level Position of Ultrathin Bi Films", Phys. Rev. Lett., 115 (2015) 106803.
M. Aitani, Y. Sakamoto, T. Hirahara, M. Yamada, H. Miyazaki, M. Matsunami, S. Kimura and S. Hasegawa
"Fermi-Level Tuning of Topological Insulator Thin Films", Jpn. Jour. Appl. Phys., 52 (2013) 110112.
A. Iguchi, T. Kawai and K. Mizoguchi
"Energy Transfer between Tl+-type Impurities in NaCl Crystals", Phys. Status Solidi C 13 (2016) 85.
S. Kaneko, T. Morimoto and Y. Ohki
"Cause of the Appearance of Oxygen Vacancies in Yttria-stabilized Zirconia and Its Relation to 2.8 eV Photoluminescence", Jpn. J. Appl. Phys. 54 (2015) 06GC03.
T. Inoue, T. Morimoto and Y. Ohki
"Experimental Observations on the Crystalline Structures of YAlO3 Single Crystal at High Temperatures", Appl. Phys. A 119 (2015) 1423.
M. Harima, T. Morimoto and Y. Ohki
"Structural Change Induced in LaAlO3 by Ion Implantation", IEEJ Trans. 11 (2016) 5.
T. Morimoto, M. Harima, Y. Horii and Y. Ohki
"Involvement of Crystallinity in Various Luminescent Bands in Yttrium Aluminate", Nucl. Instrum. Meth. B 366 (2016) 198.
M. Nagasaka, H. Yuzawa and N. Kosugi
"Development and Application of In Situ/Operando Soft X-ray Transmission Cells to Aqueous Solutions and Catalytic and Electrochemical Reactions", J. Electron Spectrosc. Relat. Phenom. 200 (2015) 293.
K. Ozaki, S. Aoki, K. Kamada, T. Kosaka, F. Mizutani, E. Shibayama, S. Takahashi, Y. Tateishi, S. Tawa, K. Yamada, H. Kawahara, N. Otsuka and H. Rokujo
"Development of New-type Nuclear Emulsion for a Balloon-borne Emulsion Gamma-ray Telescope Experiment", JINST 10 (2015) 12018.
T. Hajiri, T. Ito, M. Matsunami, B. H. Min, Y. S. Kwon, K. Kuroki and S. Kimura
"Orbital-Dependent Electron Correlation in LiFeAs Revealed by Angle-resolved Photoemission Spectroscopy", Phys. Rev. B 93 (2016) 024503.
M. Kitaura, S. Tanaka, M. Itoh, A. Ohnishi, H. Kominami, K. Hara
"Excitation Process of Ce3+ and Eu2+ Ions Doped in SrGa2S4 Crystals Under the Condition of Multiplication of Electronic Excitations ", J. Lumin. 172 (2016) 243.

List of Research Papers