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Atomic, Molecular & Optical Physics Laboratory
Toshiyuki AZUMA
Chief Scientist
Toshiyuki AZUMA (D.Eng.)
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Research Areas

We experimentally study wide-ranged physical processes; cold chemical reaction relevant to universe evolution, dynamics of large complex molecules, atom interaction with crystals, from new methods and view points of atomic, molecular and optical physics. We recently have started development of a compact electrostatic ion storage ring dedicated for investigating molecular collisions and dynamics. Low-energy collisions and reactions of cold molecular ions in the specific vibrational and rotational states prepared by the ring is our primary mission to be explored. We have also been trying manipulation of high-energy heavy atomic ions by the crystal periodic fields, which is expected to be a new tool for spectroscopy and manipulation of heavy ions in the energy region from EUV to X-rays.

Research Subject

  1. Atomic, and molecular collisions using an electrostatic ion storage ring
  2. Resonant coherent excitation of fast highly charged ions

Related links

  1. RIKEN Advanced Science Institute Website_Laboratories PageNew Window
  2. Individual Website Laboratory PageNew Window

List of Selected Publications

  1. Sundén, A. E. K., Goto, M., Matsumoto, J., Shiromaru, H., Tanuma, H., Azuma, T., Andersen, J. U., Canton, S. E., Hansen, K.:
    "Absolute Cooling Rates of Freely Decaying Fullerenes."
    Phys. Rev. Lett. 103, 143001(2009).
  2. Nakano, Y., Kondo, C., Hatakeyama, A., Nakai, Y., Azuma, T., Komaki, K., Yamazaki, Y., Takada, E., and Murakami, T.:
    "Polarization Control in Three-dimensional Resonant Coherent Excitation."
    Phys. Rev. Lett., 102, 085502(2009).
  3. Nakai, Y., Nakano, Y., Azuma, T., Hatakeyama, A., Kondo, C., Komaki, K., Yamazaki, Y., Takada, E., and Murakami, T.:
    "Dressed Atoms in Flight through a Periodic Crystal Field: X-VUV Double Resonance."
    Phys. Rev. Lett., 101, 113201(2008).
  4. Goto, M., Togawa, M., Jinno, S., Takao, T., Matsumoto, J., Shiromaru, H., Achiba, Y., Tanuma, H., and Azuma, T.:
    "Absorption spectra of zinc phthalocyanine anions under radiative cooling."
    Chem. Phys. Lett., 460, 46-49(2008).
  5. Goto, M., Yasuda, Y., Jinno, S., Takao, T., Hanada, K., Tanuma, H., Azuma, T., Sugiura, K.-i., Shiromaru, H., and Achiba, Y.:
    "Electron detachment of super-excited porphyrin anions in an electrostatic ion storage ring ."
    Eur. Phys. J., D 43, 65-68 (2007).
  6. Jinno, S., Takao, T., Hanada, K., Okuno, K., Tanuma, H., Azuma, T., Goto, M., and Shiromaru, H.:
    "Storage and mass-selective control of ions in an electrostatic ion storage ring."
    Nucl. Instr. Meth., A572, 568-579(2007).
  7. Azuma, T., Takabayashi, Y., Kondo, C., Muranaka, T., Komaki, K., Yamazaki, Y., Takada, E., and Murakami, T.:
    "Anisotropic X-Ray Emission from Heliumlike Fe24+ Ions Aligned by Resonant Coherent Excitation with a Periodic Crystal Potential ."
    Phys. Rev. Lett., 97, 145502(2006).
  8. Kondo, C., Masugi, S., Nakano, Y., Hatakeyama, A., Azuma, T., Komaki, K., Yamazaki, Y., Murakami, T., and Takada, E.:
    "Three-Dimensional Resonant Coherent Excitation of Nonchanneling Ions in a Crystal."
    Phys. Rev. Lett., 97, 135503(2006).
  9. Kaneyasu, T., Azuma, T., and Okuno, K.:
    "Collision dynamics of the Kr8+ +N2 system studied by a multi-coincidence technique."
    J. Phys., B 38, 1341-1361(2005).
  10. Jinno, S., Takao, T., Omata, Y., Satou, A., Tanuma, H., Azuma, T., Shiromaru, H., Okuno, K., Kobayashi, N., and Watanabe, I.:
    "TMU electrostatic ion storage ring designed for operation at liquid nitrogen temperature."
    Nucl. Instr. Meth., A532, 477-482(2004).
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