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3 results on '"Tetsuya Tachibana"'

1. Ionization of Xenon Clusters by a Hard X-ray Laser Pulse

Author

Yoshiaki Kumagai, Weiqing Xu, Kazuki Asa, Toshiyuki Hiraki Nishiyama, Koji Motomura, Shin-ichi Wada, Denys Iablonskyi, Subhendu Mondal, Tetsuya Tachibana, Yuta Ito, Tsukasa Sakai, Kenji Matsunami, Takayuki Umemoto, Christophe Nicolas, Catalin Miron, Tadashi Togashi, Kanade Ogawa, Shigeki Owada, Kensuke Tono, Makina Yabashi, Hironobu Fukuzawa, Kiyonobu Nagaya, Kiyoshi Ueda, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University [Sendai], Tokyo University of Agriculture and Technology (TUAT), ShanghaiTech University [Shanghai], Kyoto University, RIKEN SPring-8 Center [Hyogo] (RIKEN RSC), RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN), Graduate School of Advanced Science and Engineering [Higashi-Hiroshima], Hiroshima University, Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Synchrotron SOLEIL (Synchrotron SOLEIL), Maxlab, Lund University [Lund], Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Japan Synchrotron Radiation Research Institute [Hyogo] (JASRI)

Subjects
Fluid Flow and Transfer Processes, [PHYS]Physics [physics], ion time-of-flight spectroscopy, xenon cluster, nanoplasma, Process Chemistry and Technology, hard X-ray laser, General Engineering, General Materials Science, electron spectroscopy, Instrumentation, pump–probe experiment, Computer Science Applications
Abstract

Ultrashort pulse X-ray free electron lasers (XFFLs) provided us with an unprecedented regime of X-ray intensities, revolutionizing ultrafast structure determination and paving the way to the novel field of non-linear X-ray optics. While pioneering studies revealed the formation of a nanoplasma following the interaction of an XFEL pulse with nanometer-scale matter, nanoplasma formation and disintegration processes are not completely understood, and the behavior of trapped electrons in the electrostatic potential of highly charged species is yet to be decrypted. Here we report the behavior of the nanoplasma created by a hard X-ray pulse interacting with xenon clusters by using electron and ion spectroscopy. To obtain a deep insight into the formation and disintegration of XFEL-ignited nanoplasma, we studied the XFEL-intensity and cluster-size dependencies of the ionization dynamics. We also present the time-resolved data obtained by a near-infrared (NIR) probe pulse in order to experimentally track the time evolution of plasma electrons distributed in the XFEL-ignited nanoplasma. We observed an unexpected time delay dependence of the ion yield enhancement due to the NIR pulse heating, which demonstrates that the plasma electrons within the XFEL-ignited nanoplasma are inhomogeneously distributed in space.

Published
2023

2. Real-time observation of disintegration processes within argon clusters ionized by a hard-x-ray pulse of moderate fluence

Author

Weiqing Xu, Toshiyuki Nishiyama, Kiyonobu Nagaya, Yoshiaki Kumagai, Catalin Miron, Tetsuya Tachibana, Sang-Kil Son, Takayuki Umemoto, Koji Motomura, Robin Santra, Beata Ziaja, D. Iablonskyi, Hironobu Fukuzawa, Kiyoshi Ueda, Makina Yabashi, Kensuke Tono, Christophe Nicolas, T. Sakai, Shigeki Owada, Shin-ichi Wada, S. Mondal, Tadashi Togashi, K. Matsunami, Zoltan Jurek, Yuta Ito, Kanade Ogawa, Tohoku University [Sendai], Deutsches Elektronen-Synchrotron [Hamburg] (DESY), Beihang University (BUAA), RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN), Kyoto University, Hiroshima University, Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Japan Synchrotron Radiation Research Institute [Hyogo] (JASRI), Kyoto University [Kyoto], and Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, [PHYS]Physics [physics], Argon, chemistry.chemical_element, 01 natural sciences, Fluence, 010305 fluids & plasmas, Ion, chemistry, Fragmentation (mass spectrometry), Excited state, Ionization, 0103 physical sciences, Rydberg atom, ddc:530, Physics::Atomic Physics, Atomic physics, 010306 general physics, Spectroscopy
Abstract

Physical review / A covering atomic, molecular, and optical physics and quantum information 101(2), 023412 (2020). doi:10.1103/PhysRevA.101.023412, We present a time-resolved study of disintegration within atomic clusters ionized by a hard-x-ray pulse of moderate fluence. It was performed with electron and ion spectroscopy, and complemented by theoretical simulations. The expanding clusters were probed with a near-infrared (NIR) laser pulse over a range of pump-probe delays from −4 to 10 ps. In addition to an increasing number of singly charged atomic ions, originating from the ionization of Rydberg atoms formed through electron-ion recombination, we observe a decrease of oligomer yields. The latter is due to the interaction of oligomers with the NIR probe pulse, leading to their dissociation. At time delays between −1 and 2 ps, efficient absorption of the NIR laser energy occurs, even though the NIR intensity is too low to trigger tuneling ionization of Ar atoms. Our observations are similar to earlier observations of the fragmentation behavior of clusters excited by soft-x-ray pulses. This indicates that the relaxation dynamics of x-ray-excited nano-objects are universal over a wide range of excitation photon energies., Published by Inst., Woodbury, NY

Published
2020

3. Real-time observation of X-ray-induced intramolecular and interatomic electronic decay in CH2I2

Author

Christophe Nicolas, Hirohiko Kono, Aryya Ghosh, Kanade Ogawa, S. Mondal, Kiyoshi Ueda, Naoki Kishimoto, Hiroshi Fukumura, Kohei Ochiai, Kiyonobu Nagaya, Artem Rudenko, Serguei L. Molodtsov, Per Johnsson, K. Matsunami, Toshiyuki Nishiyama, Kango Kariyazono, Syuhei Yamada, Shin-ichi Wada, Liviu Neagu, Shigeki Owada, T. Sakai, Catalin Miron, Y. Sato, Xiao-Jing Liu, Alexander I. Kuleff, Yuta Ito, Daehyun You, Manabu Kanno, Kuno Kooser, Yuta Sakakibara, Tsukasa Takanashi, Tetsuya Tachibana, Kazuki Asa, Shinji Kajimoto, Kensuke Tono, Tetsuo Katayama, D. Iablonskyi, Lorenz S. Cederbaum, Koji Motomura, Yoshiaki Kumagai, Tadashi Togashi, Makina Yabashi, G. Kastirke, Kaoru Yamazaki, Hironobu Fukuzawa, Kirill Gokhberg, Edwin Kukk, Theodor Asavei, Hikaru Sotome, Takayuki Umemoto, Markus Schöffler, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University [Sendai], University of Turku, RIKEN SPring-8 Center [Hyogo] (RIKEN RSC), RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN), Kyoto University [Kyoto], Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Hiroshima University, Lund University [Lund], J.W. Goethe-Universität, Goethe-Universität Frankfurt am Main, Beihang University (BUAA), Horia Hulubei National Institute for Physics and Nuclear Engineering, Technishe Universität Bergakademie Freiberg (TU Bergakademie Freiberg), National Institute of Advanced Industrial Science and Technology (AIST), Japan Synchrotron Radiation Research Institute [Hyogo] (JASRI), Universität Heidelberg [Heidelberg], Physikalisch-Chemisches Institut [Heidelberg] (PCI), Kansas State University, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Kyoto University, Universität Heidelberg [Heidelberg] = Heidelberg University, and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)

Subjects
0301 basic medicine, Chemical physics, Astrophysics::High Energy Astrophysical Phenomena, Science, General Physics and Astronomy, 02 engineering and technology, General Biochemistry, Genetics and Molecular Biology, Auger, Ion, 03 medical and health sciences, chemistry.chemical_compound, Interatomic Coulombic decay, Fragmentation (mass spectrometry), Free-electron lasers, Physics::Atomic and Molecular Clusters, Molecule, ddc:530, Diiodomethane, lcsh:Science, Physics, 01.03. Fizikai tudományok, [PHYS]Physics [physics], Multidisciplinary, Atomic and molecular interactions with photons, General Chemistry, 021001 nanoscience & nanotechnology, 3. Good health, 030104 developmental biology, chemistry, Intramolecular force, Femtosecond, lcsh:Q, Atomic physics, 0210 nano-technology
Abstract

The increasing availability of X-ray free-electron lasers (XFELs) has catalyzed the development of single-object structural determination and of structural dynamics tracking in real-time. Disentangling the molecular-level reactions triggered by the interaction with an XFEL pulse is a fundamental step towards developing such applications. Here we report real-time observations of XFEL-induced electronic decay via short-lived transient electronic states in the diiodomethane molecule, using a femtosecond near-infrared probe laser. We determine the lifetimes of the transient states populated during the XFEL-induced Auger cascades and find that multiply charged iodine ions are issued from short-lived (∼20 fs) transient states, whereas the singly charged ones originate from significantly longer-lived states (∼100 fs). We identify the mechanisms behind these different time scales: contrary to the short-lived transient states which relax by molecular Auger decay, the long-lived ones decay by an interatomic Coulombic decay between two iodine atoms, during the molecular fragmentation., X線照射で始まる超高速反応の観測に成功 --レントゲンによるX線の発見から120年で初--. 京都大学プレスリリース. 2019-05-28.

Published
2019

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