Chief Scientist Laboratories Atomic, Molecular & Optical Physics Laboratory
Chief Scientist: Toshiyuki Azuma (D.Eng.)
Research Summary
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 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 Subjects:
- Atomic, and molecular collisions using an electrostatic ion storage ring
- Exploring atomic, molecular, and photonic physics utilizing rthe advanced photon sources
- Resonant coherent excitation of fast highly charged ions
Main Research Fields
- Physics
Related Research Fields
- Chemistry
- Space Science
Selected Publications
- 1.
Alena Ananyeva, Angela Bräuning-Demian, Yuji Nakano, Ken-ichiro Komaki, Yoichi Nakai, Yoko Shiina, Eiichi Takada, Takashi Murakami, Alexey V. Stysin, and Toshiyuki Azuma.:
"Doubly resonant coherent excitation in the x-ray regime: 1s−3d transition in H-like Ar17+"
Phys. Rev. A 109, 053101 (2024) - 2.
Arisa Iguchi, Amandeep Singh, Stefan Bergmeister, Andrew A. Azhagesan, Kenta Mizuse, Asuka Fujii, Hajime Tanuma, Toshiyuki Azuma, Paul Scheier, Susumu Kuma, and Andrey F. Vilesov.:
"Isolation and Infrared Spectroscopic Characterization of Hemibonded Water Dimer Cation in Superfluid Helium Nanodroplets"
J. Phys. Chem. Lett. 14, 36, 8199–8204 (2023) - 3.
Takuma Okumura, Toshiyuki Azuma, Douglas A. Bennett, I-Huan Chiu, William B. Doriese, Malcolm S. Durkin, Joseph W. Fowler, Johnathon D. Gard, Tadashi Hashimoto, Ryota Hayakawa, Gene C. Hilton, Yuto Ichinohe, Paul Indelicato, Tadaaki Isobe, Sohtaro Kanda, Miho Katsuragawa, Naritoshi Kawamura, Yasushi Kino, Kairi Mine, Yasuhiro Miyake, Kelsey M. Morgan, Kazuhiko Ninomiya, Hirofumi Noda, Galen C. O’Neil, Shinji Okada, Kenichi Okutsu, Nancy Paul, Carl D. Reintsema, Dan R. Schmidt, Koichiro.:
"Proof-of-Principle Experiment for Testing Strong-Field Quantum Electrodynamics with Exotic Atoms: High Precision X-Ray Spectroscopy of Muonic Neon"
Phys. Rev. Lett. 130, 173001 (2023) - 4.
Naoki Kimura, Priti, Yasutaka Kono, Pativate Pipatpakorn, Keigo Soutome, Naoki Numadate, Susumu Kuma, Toshiyuki Azuma & Nobuyuki Nakamura.:
"Hyperfine-structure-resolved laser spectroscopy of many-electron highly charged ions"
Commun. Phys. 6, 8 (2023) - 5.
Masatomi Iizawa, Susumu Kuma, Naoki Kimura, Kiattichart Chartkunchand, Sakumi Harayama, Toshiyuki Azuma, and Yuji Nakano
"Photodetachment Spectroscopy of Highly Excited C2– and Their Temporal Evolution in the Ion Storage Ring RICE"
J. Phys. Soc. Jpn. 91, 084302 (2022) - 6.
S. Iida, S. Kuma, M. Kuriyama, T. Furukawa, M. Kusunoki, H. Tanuma, K. Hansen, H. Shiromaru, and T. Azuma.:
"IR-photon quenching of delayed electron detachment from hot pentacene anions"
Phys. Rev. A 104, 043114 (2021) - 7.
T. Okumura, T. Azuma, D. A. Bennett, P. Caradonna, I. Chiu, W. B. Doriese, M. S. Durkin, J. W. Fowler, J. D. Gard, T. Hashimoto, R. Hayakawa, G. C. Hilton, Y. Ichinohe, P. Indelicato, T. Isobe, S. Kanda, D. Kato, M. Katsuragawa, N. Kawamura, Y. Kino, M. K. Kubo, K. Mine, Y. Miyake, K. M. Morgan, K. Ninomiya, H. Noda, G. C. O’Neil, S. Okada, K. Okutsu, T. Osawa, N. Paul, C. D. Reintsema, D. R. Schmidt, K. Shimomura, P. Strasser, H. Suda, D. S. Swetz, T. Takahashi, S. Takeda, S. Takeshita, M. Tampo, H. Tatsuno, X. M. Tong, Y. Ueno, J. N. Ullom, S. Watanabe, and S. Yamada.:
"Deexcitation Dynamics of Muonic Atoms Revealed by High-Precision Spectroscopy of Electronic K X rays"
Phys. Rev. Lett. 127, 053001 (2021) - 8.
Nancy Paul, Guojie Bian, Toshiyuki Azuma, Shinji Okada, and Paul Indelicato.:
"Testing Quantum Electrodynamics with Exotic Atoms"
Phys. Rev. Lett. 126, 173001 (2021) - 9.
R. Igosawa, A. Hirota, N. Kimura, S. Kuma, K. C. Chartkunchand, P. M. Mishra, M. Lindley, T. Yamaguchi, Y. Nakano, and T. Azuma.:
"Photodissociation spectroscopy of N2O+ in the ion storage ring RICE"
J. Chem. Phys. 153, 184305 (2020) - 10.
A. Hirota, R. Igosawa, N. Kimura, S. Kuma, K. C. Chartkunchand, P. M. Mishra, M. Lindley, T. Yamaguchi, Y. Nakano, and T. Azuma.:
"Radiative cooling dynamics of isolated N2O+ ions in a cryogenic electrostatic ion storage ring"
Phys. Rev. A 102, 023119 (2020)
Recent Research Results
Feb. 9, 2024
Helium droplets capture double water structure
Oct. 2, 2023
Quantum electrodynamics passes high-field test
Annual research report
Related Links
Lab Members
Principal investigator
- Toshiyuki Azuma
- Chief Scientist
Core members
- Susumu Kuma
- Senior Research Scientist
- Masafumi Jo
- Senior Research Scientist
- Mizuo Maeda
- Research Scientist
- Takeshi Saito
- Special Postdoctoral Researcher
- Sakumi Harayama
- Junior Research Associate
- Rei Takahashi
- Student Trainee
- Seiya Ohrui
- Student Trainee
- Naoki Kimura
- Visiting Scientist
- Arisa Iguchi
- Visiting Scientist
- Takuma Okumura
- Visiting Scientist
- Shinji Okada
- Visiting Scientist
- Yuji Nakano
- Visiting Scientist
- Shinya Yamada
- Visiting Scientist
- Takahiro Teramoto
- Visiting Scientist
- Kyungwon An
- Visiting Scientist
- Masaaki Baba
- Research Consultant
- Yuki Fukushima
- Administrative Part-time Worker I
- Mamiko Tonegawa
- Administrative Part-time Worker I
- Masumi Furumoto
- Administrative Part-time Worker II
Contact Information
2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Email: toshiyuki-azuma@riken.jp