“IR-photon quenching of delayed electron detachment from hot pentacene anions”
S. Iida,
S. Kuma,
M. Kuriyama,
T. Furukawa,
M. Kusunoki,
H. Tanuma,
K. Hansen,
H. Shiromaru,
and
T. Azuma
Phys. Rev. A 104, 043114 (2021)
Selected as Editors’ Suggestion
“Deexcitation Dynamics of Muonic Atoms Revealed by High-Precision Spectroscopy of Electronic
K X rays”
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
Phys. Rev. Lett. 127, 053001 (2021)
Selected as Editors’ Suggestion
Press release (in Japanese) here
“Dynamical Response of Transition-Edge Sensor Microcalorimeters to a Pulsed Charged-Particle Beam”
Takuma Okumura,
Toshiyuki Azuma,
Douglas A. Bennett,
Pietro Caradonna,
I-Huan Chiu,
W. Bertrand 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,
Takahito Osawa,
Nancy Paul,
Carl D. Reintsema,
Dan R. Schmidt,
Koichiro Shimomura,
Patrick Strasser,
Hirotaka Suda,
Daniel S. Swetz,
Tadayuki Takahashi,
Shinichiro Takeda,
Soshi Takeshita,
Hideyuki Tatsuno,
Yasuhiro Ueno,
Joel N. Ullom,
Shin Watanabe,
Shinya Yamada
in IEEE Transactions on Applied Superconductivity, 31, 5, 1-4 (2021)
“Electronic spectroscopy of Mg-phthalocyanine embedded in cold hydrogen clusters produced by a pulsed nozzle”
Hatsuki Otani,
Hiroko Nakahara,
Haruka Goto,
Susumu Kuma,
and
Takamasa Momose
J. Chem. Phys. 155, 044309 (2021)
“Prospect for Precision Measurement of the Yb2+ 1S0–3P0o Transition Frequency”
Naoki Kimura and Masatoshi Kajita
J. Phys. Soc. Jpn. 90, 064302 (2021)
“Testing Quantum Electrodynamics with Exotic Atoms”
Nancy Paul, Guojie Bian, Toshiyuki Azuma, Shinji Okada, and Paul Indelicato
Phys. Rev. Lett. 126, 173001 (2021)
“Status of the Laser Spectroscopy and Merged-beam Experiments at RICE”
Y. Nakano, R. Igosawa, S. Iida, S. Okada, M. Lindley, S. Menk, R. Nagaoka, T. Hashimoto, S. Yamada, T. Yamaguchi, S. Kuma, and T. Azuma
JPS Conf. Proc. 35, 011006 (2021)
“Broadband high-energy resolution hard x-ray spectroscopy using transition edge sensors at SPring-8”
Shinya Yamada,
Yuto Ichinohe,
Hideyuki Tatsuno,
Ryota Hayakawa,
Hirotaka Suda,
Takaya Ohashi,
Yoshitaka Ishisaki,
Tomoya Uruga,
Oki Sekizawa,
Kiyofumi Nitta,
Yoshio Takahashi,
Takaaki Itai,
Hiroki Suga,
Makoto Nagasawa,
Masato Tanaka,
Minako Kurisu,
Tadashi Hashimoto,
Douglas Bennett,
Ed Denison,
William Bertrand Doriese,
Malcolm Durkin,
Joseph Fowler,
Galen O’Neil,
Kelsey Morgan,
Dan Schmidt,
Daniel Swetz,
Joel Ullom,
Leila Vale,
Shinji Okada,
Takuma Okumura,
Toshiyuki Azuma,
Toru Tamagawa,
Tadaaki Isobe,
Satoshi Kohjiro,
Hirofumi Noda,
Keigo Tanaka,
Akimichi Taguchi,
Yuki Imai,
Kosuke Sato,
Tasuku Hayashi,
Teruhiko Kashiwabara,
and
Kohei Sakata
Rev. Sci. Instrum. 92, 013103 (2021)
Press release (in Japanese) here
“Photodissociation spectroscopy of N2O+ in the ion storage ring RICE”
R. Igosawa,
A. Hirota,
N. Kimura,
S. Kuma,
K. C. Chartkunchand,
P. M. Mishra,
M. Lindley,
T. Yamaguchi,
Y. Nakano,
and
T. Azuma
J. Chem. Phys. 153, 184305 (2020)
“Prospect for Vibrational Transition Frequency Measurement of Rare-gas Hydride Ions”
Masatoshi Kajita
and
Naoki Kimura
J. Phys. Soc. Jpn. 89, 114301 (2020)
“5p-4f level crossing in palladium-like ions and its effect on metastable states”
Naoki Kimura, Ryunosuke Kodama, Priti, Naoki Numadate, Kento Suzuki, Masashi Monobe, and Nobuyuki Nakamura
Phys. Rev. A 102, 032807 (2020)
“Radiative cooling dynamics of isolated N2O+ ions in a cryogenic electrostatic ion storage ring”
A. Hirota,
R. Igosawa,
N. Kimura,
S. Kuma,
K. C. Chartkunchand,
P. M. Mishra,
M. Lindley,
T. Yamaguchi,
Y. Nakano,
and
T. Azuma
Phys. Rev. A 102, 023119 (2020)
“Threshold Photodetachment Spectroscopy of the Positronium Negative Ion”
Koji Michishio,
Susumu Kuma,
Yugo Nagata,
Luca Chiari,
Taro Iizuka,
Riki Mikami,
Toshiyuki Azuma,
and
Yasuyuki Nagashima
Phys. Rev. Lett. 125, 063001 (2020)
“X-ray Spectroscopy of Muonic Atoms Isolated in Vacuum with Transition Edge Sensors”
S. Okada,
T. Azuma,
D. A. Bennett,
P. Caradonna,
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,
M. Katsuragawa,
N. Kawamura,
Y. Kino,
Y. Miyake,
K. M. Morgan,
K. Ninomiya,
H. Noda,
G. C. O’Neil,
T. Okumura,
C. D. Reintsema,
D. R. Schmidt,
K. Shimomura,
P. Strasser,
D. S. Swetz,
T. Takahashi,
S. Takeda,
S. Takeshita,
H. Tatsuno,
Y. Ueno,
J. N. Ullom,
S. Watanabe
and
S. Yamada
J. Low Temp. Phys. (2020) DOI: 10.1007/s10909-020-02476-5
“Rotationally Resolved Excitation Spectra Measured by Slow Electron Detachment from Si2–“
Shimpei Iida,
Susumu Kuma,
Jun Matsumoto,
Takeshi Furukawa,
Hajime Tanuma,
Toshiyuki Azuma,
Haruo Shiromaru,
Vitali Zhaunerchyk,
and
Klavs Hansen
J. Phys. Chem. Lett. 11(13), 5199–5203 (2020)
“Radiative cooling of cationic carbon clusters, CN+, N = 8, 10, 13–16″
F.-Q. Chen,
N. Kono,
R. Suzuki,
T. Furukawa,
H. Tanuma,
P. Ferrari,
T. Azuma,
J. Matsumoto,
H. Shiromaru,
V. Zhaunerchyk,
and
K. Hansen
Phys. Chem. Chem. Phys. 21, 1587 (2019)
“Impact of a hydrophobic ion on the early stage of atmospheric aerosol formation”
Linda Feketeová,
Paul Bertier,
Thibaud Salbaing,
Toshiyuki Azuma,
Florent Calvo,
Bernadette Farizon,
Michel Farizon,
and
Tilmann D. Märk
PNAS, 116(45), 22540-22544 (2019)
“Roadmap on photonic, electronic and atomic collision physics: III. Heavy particles: with zero to relativistic speeds”
Friedrich Aumayr,
Kiyoshi Ueda,
Emma Sokell,
Stefan Schippers,
HosseinSadeghpour,
Frédéric Merkt,
Thomas F Gallagher,
F Barry Dunning,
Paul Scheier,
Olof Echt,
Tom Kirchner,
Stephan Fritzsche,
Andrey Surzhykov,
Xinwen Ma,
Roberto Rivarola,
Omar Fojon,
Lokesh Tribedi,
Emily Lamour,
José R Crespo López-Urrutia,
Yuri A Litvinov,
Vladimir Shabaev,
Henrik Cederquist,
Henning Zettergren,
Marika Schleberger,
Richard A Wilhelm,
Toshiyuki Azuma,
Philippe Boduch,
Henning T Schmidt,
and
Thomas Stöhlker
J. Phys. B52, 171003 (2019)
“A cryogenic linear ion trap beamline for providing keV ion bunches”
S. Menk, P. Bertier, Y. Enomoto, T. Masunaga, T. Majima, Y. Nakano, and T. Azuma
Rev. Sci. Instr. 89, 113110 (2018)
“Electronic and vibrational radiative cooling of the small carbon clusters C4– and C6–“
N. Kono, R. Suzuki, T. Furukawa, J. Matsumoto, H. Tanuma, H. Shiromaru, T. Azuma, and K. Hansen
Phys. Rev. A 98, 063434 (2018)
“Superfluorescence, Free-Induction Decay, and Four-Wave Mixing: Propagation of Free-Electron Laser Pulses through a Dense Sample of Helium Ions”
J. R. Harries, H. Iwayama, S. Kuma, M. Iizawa, N. Suzuki, Y. Azuma, I. Inoue, S. Owada, T. Togashi, K. Tono, M. Yabashi, and E. Shigemasa
Phys. Rev. Lett. 121, 263201 (2018)
Press release (in Japanese)
here
“Design and commissioning of the RIKEN cryogenic electrostatic ring (RICE)” Y. Nakano, Y. Enomoto, T. Masunaga, S. Menk, P. Bertier, and T. Azuma Rev. Sci. Instrum. 88, 033110 (2017)
“Detection of Recurrent Fluorescence Photons” Y. Ebara, T. Furukawa, J. Matsumoto, H. Tanuma, T. Azuma, H. Shiromaru, and K. Hansen Phys. Rev. Lett. 117, 133004 (2016)
Press release (in Japanese)
here
“Observation of a shape resonance of the positronium negative ion” K. Michishio, T. Kanai, S. Kuma, T. Azuma, K. Wada, I. Mochizuki, T. Hyodo, A. Yagishita and Y. Nagashima Nature Communications 7, 11060 (2016)
Press release (in Japanese)
here
2015
“Inverse internal conversion in C4? below the electron detachment threshold” N. Kono, T. Furukawa, H. Tanuma, J. Matsumoto, H. Shiromaru, T. Azuma, K. Najafian, M. S. Pettersson, B. Dynefors and K. Hansen Phys. Chem. Chem. Phys. 17, 24732 (2015)
“Metastable Ar17+ (2s) production by Stark-assisted resonant coherent excitation” Y. Nakano, A. A. Sokolik, A. V. Stysin, Y. Nakai, K. Komaki, E. Takada, T. Murakami and T. Azuma J. Phys. B: At. Mol. Opt. Phys. 48 144026 (2015) Selected as an featured article in LabTalk
“Cooling dynamics of photo-excited negative carbon cluster ions stored in an ion storage ring” T. Furukawa, G. Ito, M. Goto, T. Majima, H. Tanuma, J. Matsumoto, H. Shiromaru, K. Hansen and T. Azuma Nucl. Instrum. Methods Phys. Res., Sect. B 354, 192 (2015)
“A streak camera study of superfluorescence at multiple wavelengths from helium atoms excited using free electron laser pulses” J. R. Harries, H. Iwayama, M. Nagasono, T. Togashi, M. Yabashi, S. Kuma, K. Nakajima, Y. Miyamoto, C. Ohae, N. Sasao and E. Shigemasa J. Phys. B: At. Mol. Opt. Phys. 48 105002 (2015)Erratum
“Simultaneous Measurements of Super-Radiance at Multiple Wavelengths from Helium Excited States: I. Experiment” K. Nakajima, J. R. Harries, H. Iwayama, S. Kuma, Y. Miyamoto, M. Nagasono, C. Ohae, T. Togashi, M. Yabashi, E. Shigemasa and N. Sasao J. Phys. Soc. Jpn. 84, 054301 (2015)
2014
“Cooling dynamics of photo-excited C6– and C6H–“ G. Ito, T. Furukawa, H. Tanuma, J. Matsumoto, H. Shiromaru, T. Majima, M. Goto, T. Azuma, and K. Hansen Phys. Rev. Lett. 112, 183001 (2014)
“Radiative cooling of C7–“ K. Najafian, M.S. Pettersson, B. Dynefors, H. Shiromaru, J. Matsumoto, H. Tanuma, T. Furukawa, T. Azuma, K. Hansen J. Chem. Phys. 140, 104311 (2014)
2013
“Effects of fine structure depolarization studied by resonant coherent excitation of H-like Ar17+” Y. Nakano, A. Hatakeyama, Y. Nakai, K. Komaki, E. Takada, T. Murakami, T. Azuma, Phys. Scr. T156, 014061 (2013)
“Stark effect in resonant coherent excitation of 2s electron of Li-like Fe23+ ions channeling in a Si crystal” Y. Nakai, Y. Nakano, T. Ikeda, Y. Kanai, T. Kambara, N. Fukunishi, C. Kondo, T. Azuma, K. Komaki, Y. Yamazaki Nucl. Instr. Meth. B 315 (2013) 94
“Direct observation of internal energy distributions of C5–“ M. Goto, A.E.K. Sundén, H. Shiromaru, J. Matsumoto, H. Tanuma, T. Azuma, and K. Hansen J. Chem. Phys. 139, 054306 (2013)
“Resonant coherent excitation of the lithiumlike uranium ion: A scheme for heavy-ion spectroscopy” Y. Nakano, Y. Takano, T. Ikeda, Y. Kanai, S. Suda, T. Azuma, H. Bräuning, A. Bräuning-Demian, D. Dauvergne, Th. Stöhlker, and Y. Yamazaki Phys. Rev. A (Rapid Comm.) 87, 060501R (2013)
2012
“Generation of Highly Phase-Matched Isolated Attosecond Pulses Using Multi-mJ, Carrier-Envelope Phase Stabilized, Few-Cycle Laser Pulses” T. Kanai, Y. Fu, Y. Kamba, S. Bohman, H. Yoshida, T. Kanai, S. Yamaguchi, E. J. Takahashi, Y. Nabekawa, A. Suda, and K. Midorikawa Multiphoton Processes and Attosecond Physics, Springer Proceedings in Physics 125, 105 (2012)
“Development of High Power Infrared Optical Parametric Amplification Laser System Seeded by Self-difference Frequency Generation Pulses” T. Kanai, S. Weber, A. Zair, C. Hutchison, T. Siegel, M. Oppermann, S. Hutchinson, T. Witting, L. Brugnera, R. A. Ganeev, T. Azuma, K. Midorikawa, and J. P. Marangos Multiphoton Processes and Attosecond Physics, Springer Proceedings in Physics 125, 45 (2012)
“Anionic Polymerization Mechanism of Acrylonitrile Trimer Anions: Key Branching Point between Cyclization and Chain Propagation” Keijiro Ohshimo, Yoshiya Inokuchi, Takayuki Ebata, Koichi Ohno J. Phys. Chem. A, 116(30), 7937-7942 (2012)
“Selective production of the doubly excited 2p2 (1D) state in He-like Ar16+ ions by resonant coherent excitation” Y. Nakano, S. Suda, A. Hatakeyama, Y. Nakai, K. Komaki, E. Takada, T. Murakami, T. Azuma Phys. Rev. A 85, 020701(R) (2012)
2011
“Harmonic Generation in Mixed Gases and Its Application to Attosecond Physics” T. Kanai, E. J. Takahashi, Y. Nabekawa, K. Midorikawa Jpn. J. Optics, 40(3), 136-141 (2011). (in Japanese)
“Observation of intrashell radiative decay of Li-like uranium (2p3/2-2s1/2) using silicon drift detectors” Y. Nakano, Y. Takano, T. Shindo, T. Ikeda, Y. Kanai, S. Suda, T. Azuma, H. Bräuning, A. Bräuning-Demian, Th. Stöhlker, D. Dauvergne, Y. Yamazaki Phys. Scr. T144, 014010 (2011)
“Electron emission from fast heavy ions associated with resonant coherent excitation” S. Suda, Y. Nakano, K. Metoki, T. Azuma, Y. Takano, A. Hatakeyama, Y. Nakai, K. Komaki, E. Takada, T. Murakami Phys. Scr. T144, 014044 (2011)
“Microhydration of the methylene blue cation in an electrospray ion source” T. Sato, T. Majima, Kenro Hashimoto, Kouhei Hashimoto, Y. Zama, J. Matsumoto, H. Shiromaru, K. Okuno, H. Tanuma, T. Azuma Eur. Phys. J. D 63, 189-194 (2011)
2009
“Absolute Cooling Rates of Freely Decaying Fullerenes” A. E. K. Sundén, M. Goto, J. Matsumoto, H. Shiromaru, H. Tanuma, T. Azuma, J.U. Andersen, S. E. Canton, K. Hansen Phys. Rev. Lett. 103, 143001 (2009)
“Polarization Control in Three-dimensional Resonant Coherent Excitation” Y. Nakano, C. Kondo, A. Hatakeyama, Y. Nakai, T. Azuma, K. Komaki, Y. Yamazaki, E. Takada and T. Murakami Phys. Rev. Lett. 102, 085502 (2009)
“Resonant Coherent Excitation of Li-like Ar15+ Ions in a Thin Si Crystal” Y. Nakano, T. Inoue, T. Azuma, A. Hatakeyama, Y. Nakai, K. Komaki, Y. Yamazaki, E. Takada, T. Murakami J. Phys. Conf. 163, 012094 (2009)