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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 recently started a new project to perform merging experiments by combining atomic and molecular beams with an intense ultra-short intense laser. 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
  3. Merging experiments of a laser beam with atomic and molecular beams

Related links

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

RIKEN RESEARCH

July 13, 2012
Recreating interstellar molecular synthesis on Earth New Window

List of Selected Publications

  1. Nakano, Y., Suda, S., Hatakeyama, A., Nakai, Y., Komaki, K., Yamazaki, Y., Takada, E., and Murakami, T., Azuma, T.:
    "Selective production of the doubly excited 2p^{2} (^{1}D) state in He-like Ar^{16+} ions by resonant coherent excitation."
    Phys. Rev. A 85, 020701(Rapid Comm) (2012).
  2. Sato, T., Majima, T., Hashimoto, K., Hashimoto, K., Zama, Y., Matsumoto, J., Shiromaru, H., Okuno, K., Tanuma, H., and Azuma, T.:
    "Microhydration of the methylene blue cation in an electrospray ion source"
    Eur. Phys. J. D63 189-194(2011).
  3. 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).
  4. 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).
  5. 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).
  6. 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).
  7. 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).
  8. 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).
  9. 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).
  10. 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).

Members

Principal Investigator

Toshiyuki AZUMA
Chief Scientist

Staff Scientist

Takane KOBAYASHI
Senior Research Scientist
Keijiro OHSHIMO
Research Scientist
Yuji NAKANO
Research Scientist
Tsuneto KANAI
Research Scientist

Postdoctoral Fellow

Yoshinori ENOMOTO
Special Postdoctoral Researcher
Motoshi GOTO
Postdoctoral Researcher

Technical Assistant

Takuya MASUNAGA
Technical Staff I

Administrative Assistant

Yuka TAKANO
Assistant
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