1
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Hikosaka Y, Kaneyasu T, Wada S, Kohguchi H, Ota H, Nakamura E, Iwayama H, Fujimoto M, Hosaka M, Katoh M. Frequency-domain interferometry for the determination of time delay between two extreme-ultraviolet wave packets generated by a tandem undulator. Sci Rep 2023; 13:10292. [PMID: 37357245 DOI: 10.1038/s41598-023-37449-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 06/21/2023] [Indexed: 06/27/2023] Open
Abstract
Synchrotron radiation, emitted by relativistic electrons traveling in a magnetic field, has poor temporal coherence. However, recent research has proved that time-domain interferometry experiments, which were thought to be enabled by only lasers of excellent temporal coherence, can be implemented with synchrotron radiation using a tandem undulator. The radiation generated by the tandem undulator comprises pairs of light wave packets, and the longitudinal coherence within a light wave packet pair is used to achieve time-domain interferometry. The time delay between two light wave packets, formed by a chicane for the electron trajectory, can be adjusted in the femtosecond range by a standard synchrotron technology. In this study, we show that frequency-domain spectra of the tandem undulator radiation exhibit fringe structures from which the time delay between a light wave packet pair can be determined with accuracy on the order of attoseconds. The feasibility and limitations of the frequency-domain interferometric determination of the time delay are examined.
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Affiliation(s)
- Y Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, Toyama, 930-0194, Japan.
| | - T Kaneyasu
- SAGA Light Source, Tosu, 841-0005, Japan
- Institute for Molecular Science, Okazaki, 444-8585, Japan
| | - S Wada
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan
| | - H Kohguchi
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan
| | - H Ota
- Institute for Molecular Science, Okazaki, 444-8585, Japan
| | - E Nakamura
- Institute for Molecular Science, Okazaki, 444-8585, Japan
| | - H Iwayama
- Institute for Molecular Science, Okazaki, 444-8585, Japan
- Sokendai (The Graduate University for Advanced Studies), Okazaki, 444-8585, Japan
| | - M Fujimoto
- Synchrotron Radiation Research Center, Nagoya University, Nagoya, 464-8603, Japan
| | - M Hosaka
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, China
| | - M Katoh
- Institute for Molecular Science, Okazaki, 444-8585, Japan
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, 739-0046, Japan
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2
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Kaneyasu T, Hikosaka Y, Wada S, Fujimoto M, Ota H, Iwayama H, Katoh M. Time domain double slit interference of electron produced by XUV synchrotron radiation. Sci Rep 2023; 13:6142. [PMID: 37061592 PMCID: PMC10105747 DOI: 10.1038/s41598-023-33039-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 04/06/2023] [Indexed: 04/17/2023] Open
Abstract
We present a new realization of the time-domain double-slit experiment with photoelectrons, demonstrating that spontaneous radiation from a bunch of relativistic electrons can be used to control the quantum interference of single-particles. The double-slit arrangement is realized by a pair of light wave packets with attosecond-controlled spacing, which is naturally included in the spontaneous radiation from two undulators in series. Photoelectrons emitted from helium atoms are observed in the energy-domain under the condition of detecting them one by one, and the stochastic buildup of the quantum interference pattern on a detector plane is recorded.
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Affiliation(s)
- T Kaneyasu
- SAGA Light Source, Tosu, 841-0005, Japan.
- Institute for Molecular Science, Okazaki, 444-8585, Japan.
| | - Y Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, Toyama, 930-0194, Japan
| | - S Wada
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan
| | - M Fujimoto
- Institute for Molecular Science, Okazaki, 444-8585, Japan
- Synchrotron Radiation Research Center, Nagoya University, Nagoya, 464-8603, Japan
| | - H Ota
- Institute for Molecular Science, Okazaki, 444-8585, Japan
| | - H Iwayama
- Institute for Molecular Science, Okazaki, 444-8585, Japan
- Sokendai (The Graduate University for Advanced Studies), Okazaki, 444-8585, Japan
| | - M Katoh
- Institute for Molecular Science, Okazaki, 444-8585, Japan
- Synchrotron Radiation Research Center, Nagoya University, Nagoya, 464-8603, Japan
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, 739-0046, Japan
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3
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Ismail I, Khalal MA, Huttula M, Jänkälä K, Bizau JM, Cubaynes D, Hikosaka Y, Bučar K, Žitnik M, Andric L, Lablanquie P, Palaudoux J, Penent F. A modified magnetic bottle electron spectrometer for the detection of multiply charged ions in coincidence with all correlated electrons: decay pathways to Xe 3+ above xenon-4d ionization threshold. Phys Chem Chem Phys 2022; 24:20219-20227. [PMID: 35983783 DOI: 10.1039/d2cp02930h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Single-photon multiple photoionization results from electron correlations that make this process possible beyond the independent electron approximation. To study this phenomenon experimentally, the detection in coincidence of all emitted electrons is the most direct approach. It provides the relative contribution of all possible multiple ionization processes, the energy distribution between electrons that can reveal simultaneous or sequential mechanisms, and, if possible, the angular correlations between electrons. In the present work, we present a new magnet design of our magnetic bottle electron spectrometer that allows the detection of multiply charged Xen+ ions in coincidence with n electrons. This new coincidence detection allows more efficient extraction of minor channels that are otherwise masked by random coincidences. The proof of principle is provided for xenon triple ionization.
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Affiliation(s)
- I Ismail
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris Cedex 05, France.
| | - M A Khalal
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris Cedex 05, France.
| | - M Huttula
- Nano and Molecular Systems Research Unit, University of Oulu, PO Box 3000, FI-90014, Finland
| | - K Jänkälä
- Nano and Molecular Systems Research Unit, University of Oulu, PO Box 3000, FI-90014, Finland
| | - J-M Bizau
- ISMO, CNRS UMR 8214, Université, Paris-Sud, bâtiment 350, F-91405, Orsay, France.,Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192, Gif-sur-Yvette Cedex, France
| | - D Cubaynes
- ISMO, CNRS UMR 8214, Université, Paris-Sud, bâtiment 350, F-91405, Orsay, France.,Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, BP 48, F-91192, Gif-sur-Yvette Cedex, France
| | - Y Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, 930-0194, Japan
| | - K Bučar
- Jozef Stefan Institute, Jamova Cesta 39, SI-1001 Ljubljana, Slovenia
| | - M Žitnik
- Jozef Stefan Institute, Jamova Cesta 39, SI-1001 Ljubljana, Slovenia
| | - L Andric
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris Cedex 05, France.
| | - P Lablanquie
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris Cedex 05, France.
| | - J Palaudoux
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris Cedex 05, France.
| | - F Penent
- Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris Cedex 05, France.
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4
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Kaneyasu T, Hosaka M, Mano A, Takashima Y, Fujimoto M, Salehi E, Iwayama H, Hikosaka Y, Katoh M. Double-pulsed wave packets in spontaneous radiation from a tandem undulator. Sci Rep 2022; 12:9682. [PMID: 35690656 PMCID: PMC9188554 DOI: 10.1038/s41598-022-13684-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 05/26/2022] [Indexed: 11/17/2022] Open
Abstract
We verify that each wave packet of spontaneous radiation from two undulators placed in series has a double-pulsed temporal profile with pulse spacing which can be controlled at the attosecond level. Using a Mach–Zehnder interferometer operating at ultraviolet wavelengths, we obtain the autocorrelation trace for the spontaneous radiation from the tandem undulator. The results clearly show that the wave packet has a double-pulsed structure, consisting of a pair of 10-cycle oscillations with a variable separation. We also report the characterization of the time delay between the double-pulsed components in different wavelength regimes. The excellent agreement between the independent measurements confirms that a tandem undulator can be used to produce double-pulsed wave packets at arbitrary wavelength.
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Affiliation(s)
- T Kaneyasu
- SAGA Light Source, Tosu, 841-0005, Japan.
| | - M Hosaka
- Synchrotron Radiation Research Center, Nagoya University, Nagoya, 464-8603, Japan.,National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, China
| | - A Mano
- Synchrotron Radiation Research Center, Nagoya University, Nagoya, 464-8603, Japan
| | - Y Takashima
- Synchrotron Radiation Research Center, Nagoya University, Nagoya, 464-8603, Japan
| | - M Fujimoto
- Synchrotron Radiation Research Center, Nagoya University, Nagoya, 464-8603, Japan.,Institute for Molecular Science, Okazaki, 444-8585, Japan.,Sokendai (The Graduate University for Advanced Studies), Okazaki, 444-8585, Japan
| | - E Salehi
- Institute for Molecular Science, Okazaki, 444-8585, Japan
| | - H Iwayama
- Institute for Molecular Science, Okazaki, 444-8585, Japan.,Sokendai (The Graduate University for Advanced Studies), Okazaki, 444-8585, Japan
| | - Y Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, Toyama, 930-0194, Japan
| | - M Katoh
- Synchrotron Radiation Research Center, Nagoya University, Nagoya, 464-8603, Japan.,Institute for Molecular Science, Okazaki, 444-8585, Japan.,Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, 739-0046, Japan
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5
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Kaneyasu T, Hikosaka Y, Fujimoto M, Iwayama H, Katoh M. Electron Wave Packet Interference in Atomic Inner-Shell Excitation. Phys Rev Lett 2021; 126:113202. [PMID: 33798343 DOI: 10.1103/physrevlett.126.113202] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 02/02/2021] [Indexed: 06/12/2023]
Abstract
We report the observation of quantum interference between electron wave packets launched from the inner-shell 4d orbital of the Xe atom. Using pairs of femtosecond radiation wave packets from a synchrotron light source, we obtain time-domain interferograms for the inner-shell excitations. This approach enables the experimental verification and control of the quantum interference between the electron wave packets. Furthermore, the femtosecond Auger decay of the inner-shell excited state is tracked. To the best of our knowledge, this is the first observation of wave packet interference in an atomic inner-shell process, and also the first time-resolved experiment on few-femtosecond Auger decay using a synchrotron light source.
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Affiliation(s)
- T Kaneyasu
- SAGA Light Source, Tosu 841-0005, Japan
- Institute for Molecular Science, Okazaki 444-8585, Japan
| | - Y Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, Toyama 930-0194, Japan
| | - M Fujimoto
- Institute for Molecular Science, Okazaki 444-8585, Japan
- Sokendai (The Graduate University for Advanced Studies), Okazaki 444-8585, Japan
| | - H Iwayama
- Institute for Molecular Science, Okazaki 444-8585, Japan
- Sokendai (The Graduate University for Advanced Studies), Okazaki 444-8585, Japan
| | - M Katoh
- Institute for Molecular Science, Okazaki 444-8585, Japan
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
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6
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Fushitani M, Sasaki Y, Matsuda A, Fujise H, Kawabe Y, Hashigaya K, Owada S, Togashi T, Nakajima K, Yabashi M, Hikosaka Y, Hishikawa A. Multielectron-Ion Coincidence Spectroscopy of Xe in Extreme Ultraviolet Laser Fields: Nonlinear Multiple Ionization via Double Core-Hole States. Phys Rev Lett 2020; 124:193201. [PMID: 32469563 DOI: 10.1103/physrevlett.124.193201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 04/14/2020] [Indexed: 06/11/2023]
Abstract
Ultrafast multiphoton ionization of Xe in strong extreme ultraviolet free-electron laser (FEL) fields (91 eV, 30 fs, 1.6×10^{12} W/cm^{2}) has been investigated by multielectron-ion coincidence spectroscopy. The electron spectra recorded in coincidence with Xe^{4+} show characteristic features associated with two-photon absorption to the 4d^{-2} double core-hole (DCH) states and subsequent Auger decay. It is found that the pathway via the DCH states, which has eluded clear identification in previous studies, makes a large contribution to the multiple ionization, despite the long FEL pulse duration compared with the lifetime of the 4d core-hole states.
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Affiliation(s)
- M Fushitani
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
- RIKEN, SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - Y Sasaki
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - A Matsuda
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
- RIKEN, SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - H Fujise
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
- RIKEN, SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - Y Kawabe
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - K Hashigaya
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - S Owada
- RIKEN, SPring-8 Center, Sayo, Hyogo 679-5148, Japan
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
| | - T Togashi
- RIKEN, SPring-8 Center, Sayo, Hyogo 679-5148, Japan
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
| | - K Nakajima
- RIKEN, SPring-8 Center, Sayo, Hyogo 679-5148, Japan
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
| | - M Yabashi
- RIKEN, SPring-8 Center, Sayo, Hyogo 679-5148, Japan
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
| | - Y Hikosaka
- RIKEN, SPring-8 Center, Sayo, Hyogo 679-5148, Japan
- Institute of Liberal Arts and Sciences, University of Toyama, Toyama 930-0194, Japan
| | - A Hishikawa
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
- RIKEN, SPring-8 Center, Sayo, Hyogo 679-5148, Japan
- Research Center for Materials Science, Nagoya University, Nagoya, Aichi 464-8602, Japan
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7
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Carniato S, Selles P, Ferté A, Berrah N, Wuosmaa AH, Nakano M, Hikosaka Y, Ito K, Žitnik M, Bučar K, Andric L, Palaudoux J, Penent F, Lablanquie P. Double-core ionization photoelectron spectroscopy of C6H6: Breakdown of the “intuitive” ortho-meta-para binding energy ordering of K−1K−1 states. J Chem Phys 2019; 151:214303. [DOI: 10.1063/1.5128614] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S. Carniato
- Laboratoire de Chimie Physique-Matière et Rayonnement (UMP 7614), Sorbonne Université, CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - P. Selles
- Laboratoire de Chimie Physique-Matière et Rayonnement (UMP 7614), Sorbonne Université, CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - A. Ferté
- Laboratoire de Chimie Physique-Matière et Rayonnement (UMP 7614), Sorbonne Université, CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - N. Berrah
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269, USA
| | - A. H. Wuosmaa
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269, USA
| | - M. Nakano
- Photon Factory, Institute of Materials Structure Science, Tsukuba 305-0801, Japan
| | - Y. Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, Toyama 930-0194, Japan
| | - K. Ito
- Photon Factory, Institute of Materials Structure Science, Tsukuba 305-0801, Japan
- Synchrotron SOLEIL, l’Orme des Merisiers, Saint-Aubin, Boîte Postale 48, 91192 Gif-sur-Yvette Cedex, France
| | - M. Žitnik
- Jozef Stefan Institute, Jamova Cesta 39, SI-1001 Ljubljana, Slovenija
| | - K. Bučar
- Jozef Stefan Institute, Jamova Cesta 39, SI-1001 Ljubljana, Slovenija
| | - L. Andric
- Laboratoire de Chimie Physique-Matière et Rayonnement (UMP 7614), Sorbonne Université, CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - J. Palaudoux
- Laboratoire de Chimie Physique-Matière et Rayonnement (UMP 7614), Sorbonne Université, CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - F. Penent
- Laboratoire de Chimie Physique-Matière et Rayonnement (UMP 7614), Sorbonne Université, CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - P. Lablanquie
- Laboratoire de Chimie Physique-Matière et Rayonnement (UMP 7614), Sorbonne Université, CNRS, 4 Place Jussieu, 75252 Paris Cedex 05, France
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8
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Kaneyasu T, Hikosaka Y, Fujimoto M, Iwayama H, Katoh M. Controlling the Orbital Alignment in Atoms Using Cross-Circularly Polarized Extreme Ultraviolet Wave Packets. Phys Rev Lett 2019; 123:233401. [PMID: 31868498 DOI: 10.1103/physrevlett.123.233401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 09/26/2019] [Indexed: 06/10/2023]
Abstract
We report on the use of pairs of 10-cycle extreme ultraviolet wave packets with attosecond-controlled spacing emitted by individual relativistic electrons within an electron bunch passing through a tandem undulator. Based on the temporal coherent control technique with circular polarization, we succeeded in controlling the excited state alignment in the photoexcitation of helium atoms, which we verified through the observation of oscillation in fluorescence yield depending on the attosecond-controlled delay time. Our work demonstrates the potential of undulator radiation for the generation of longitudinally coherent wave packets suitable for attosecond coherent control, an application which has hitherto been hidden in the incoherent nature of the radiation pulse emitted by a bunch of electrons.
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Affiliation(s)
- T Kaneyasu
- SAGA Light Source, Tosu 841-0005, Japan
- Institute for Molecular Science, Okazaki 444-8585, Japan
| | - Y Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, Toyama 930-0194, Japan
| | - M Fujimoto
- Institute for Molecular Science, Okazaki 444-8585, Japan
- Sokendai (The Graduate University for Advanced Studies), Okazaki 444-8585, Japan
| | - H Iwayama
- Institute for Molecular Science, Okazaki 444-8585, Japan
- Sokendai (The Graduate University for Advanced Studies), Okazaki 444-8585, Japan
| | - M Katoh
- Institute for Molecular Science, Okazaki 444-8585, Japan
- Sokendai (The Graduate University for Advanced Studies), Okazaki 444-8585, Japan
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-0046, Japan
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9
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Hikosaka Y, Kaneyasu T, Fujimoto M, Iwayama H, Katoh M. Coherent control in the extreme ultraviolet and attosecond regime by synchrotron radiation. Nat Commun 2019; 10:4988. [PMID: 31676792 PMCID: PMC6825198 DOI: 10.1038/s41467-019-12978-w] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 10/09/2019] [Indexed: 11/10/2022] Open
Abstract
Quantum manipulation of populations and pathways in matter by light pulses, so-called coherent control, is currently one of the hottest research areas in optical physics and photochemistry. The forefront of coherent control research is moving rapidly into the regime of extreme ultraviolet wavelength and attosecond temporal resolution. This advance has been enabled by the development of high harmonic generation light sources driven by intense femtosecond laser pulses and by the advent of seeded free electron laser sources. Synchrotron radiation, which is usually illustrated as being of poor temporal coherence, hitherto has not been considered as a tool for coherent control. Here we show an approach based on synchrotron radiation to study coherent control in the extreme ultraviolet and attosecond regime. We demonstrate this capability by achieving wave-packet interferometry on Rydberg wave packets generated in helium atoms. Synchrotron light sources have wide range of tunable parameters like frequency, intensity. Here the authors demonstrate quantum control of Rydberg states of helium using delay controlled XUV wavepackets generated from synchrotron radiation.
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Affiliation(s)
- Y Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, Toyama, 930-0194, Japan.
| | - T Kaneyasu
- SAGA Light Source, Tosu, 841-0005, Japan.,Institute for Molecular Science, Okazaki, 444-8585, Japan
| | - M Fujimoto
- Institute for Molecular Science, Okazaki, 444-8585, Japan.,Sokendai (The Graduate University for Advanced Studies), Okazaki, 444-8585, Japan
| | - H Iwayama
- Institute for Molecular Science, Okazaki, 444-8585, Japan.,Sokendai (The Graduate University for Advanced Studies), Okazaki, 444-8585, Japan
| | - M Katoh
- Institute for Molecular Science, Okazaki, 444-8585, Japan.,Sokendai (The Graduate University for Advanced Studies), Okazaki, 444-8585, Japan.,Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima, 739-0046, Japan
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10
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Kaneyasu T, Odagiri T, Nakagawa M, Mashiko R, Tanaka H, Adachi J, Hikosaka Y. Single, double, and triple Auger decays from 1s shake-up states of the oxygen molecule. J Chem Phys 2017; 147:104304. [DOI: 10.1063/1.4996572] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Iwayama H, Kaneyasu T, Hikosaka Y, Shigemasa E. Stability and dissociation dynamics of N2++ ions following core ionization studied by an Auger-electron–photoion coincidence method. J Chem Phys 2016; 145:034305. [DOI: 10.1063/1.4958620] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- H. Iwayama
- UVSOR Facility, Institute for Molecular Science, Nishigonaka 38, Myodaiji, Okazaki 444-8585, Japan
- SOKENDAI, Nishigonaka 38, Myodaiji, Okazaki 444-8585, Japan
| | | | - Y. Hikosaka
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama 930-0194, Japan
| | - E. Shigemasa
- UVSOR Facility, Institute for Molecular Science, Nishigonaka 38, Myodaiji, Okazaki 444-8585, Japan
- SOKENDAI, Nishigonaka 38, Myodaiji, Okazaki 444-8585, Japan
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12
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Carniato S, Selles P, Andric L, Palaudoux J, Penent F, Žitnik M, Bučar K, Nakano M, Hikosaka Y, Ito K, Lablanquie P. Single photon simultaneous K-shell ionization and K-shell excitation. II. Specificities of hollow nitrogen molecular ions. J Chem Phys 2015; 142:014308. [PMID: 25573562 DOI: 10.1063/1.4904274] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- S Carniato
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Universités, UPMC University of Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - P Selles
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Universités, UPMC University of Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - L Andric
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Universités, UPMC University of Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - J Palaudoux
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Universités, UPMC University of Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - F Penent
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Universités, UPMC University of Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - M Žitnik
- Jozef Stefan Institute, P.O. Box 3000, SI-1001 Ljubljana, Slovenia
| | - K Bučar
- Jozef Stefan Institute, P.O. Box 3000, SI-1001 Ljubljana, Slovenia
| | - M Nakano
- Department of Chemistry, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
| | - Y Hikosaka
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan
| | - K Ito
- Photon Factory, Institute of Materials Structure Science, Tsukuba, Ibaraki 305-0801, Japan
| | - P Lablanquie
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Universités, UPMC University of Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
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13
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Carniato S, Selles P, Andric L, Palaudoux J, Penent F, Žitnik M, Bučar K, Nakano M, Hikosaka Y, Ito K, Lablanquie P. Single photon simultaneous K-shell ionization and K-shell excitation. I. Theoretical model applied to the interpretation of experimental results on H2O. J Chem Phys 2015; 142:014307. [PMID: 25573561 DOI: 10.1063/1.4904273] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- S Carniato
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Université, UPMC University Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - P Selles
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Université, UPMC University Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - L Andric
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Université, UPMC University Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - J Palaudoux
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Université, UPMC University Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - F Penent
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Université, UPMC University Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - M Žitnik
- Jozef Stefan Institute, P.O. Box 3000, SI-1001 Ljubljana, Slovenia
| | - K Bučar
- Jozef Stefan Institute, P.O. Box 3000, SI-1001 Ljubljana, Slovenia
| | - M Nakano
- Department of Chemistry, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551, Japan
| | - Y Hikosaka
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan
| | - K Ito
- Institute of Materials Structure Science, Photon Factory, Tsukuba, Ibaraki 305-0801, Japan
| | - P Lablanquie
- Laboratoire de Chimie Physique-Matière et Rayonnement, UMR 7614, Sorbonne Université, UPMC University Paris 6, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
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14
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Gejo T, Ikegami T, Honma K, Takahashi O, Shigemasa E, Hikosaka Y, Tamenori Y. Dynamics of oxygen Rydberg atom generation following O 1sinner-shell excitation of H2O. J Chem Phys 2014; 140:214310. [DOI: 10.1063/1.4880557] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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15
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Hikosaka Y, Shibata Y, Soejima K, Iwayama H, Shigemasa E. Site-specific formation of metastable dications following inner-shell ionization of CO2. Chem Phys Lett 2014. [DOI: 10.1016/j.cplett.2014.04.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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16
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Hikosaka Y, Sawa M, Nakano M, Soejima K, Lablanquie P, Penent F, Ito K. Electron reemission processes following photoelectron recapture due to post-collision interaction in inner-shell photoionization of water molecules. J Chem Phys 2014; 138:214308. [PMID: 23758372 DOI: 10.1063/1.4808028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Electron reemission following photoelectron recapture due to post-collision interaction has been studied at 0.7 eV the inner-shell photoionization threshold of water molecules, using a multi-electron coincidence method. Electron reemissions after single Auger decay occur from O and OH fragments which are produced by the dissociations of high-n Rydberg H2O(+) states populated through photoelectron recapture. In addition, electron reemissions after double Auger decay are identified in triple coincidence events, where autoionization lines from O and O(+) fragments are observed.
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Affiliation(s)
- Y Hikosaka
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan.
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17
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Nakano M, Selles P, Lablanquie P, Hikosaka Y, Penent F, Shigemasa E, Ito K, Carniato S. Near-edge x-ray absorption fine structures revealed in core ionization photoelectron spectroscopy. Phys Rev Lett 2013; 111:123001. [PMID: 24093255 DOI: 10.1103/physrevlett.111.123001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Indexed: 06/02/2023]
Abstract
Simultaneous core ionization and core excitation have been observed in the C(2)H(2n) (n=1, 2, 3) molecular series using synchrotron radiation and a magnetic bottle time-of-flight electron spectrometer. Rich satellite patterns corresponding to (K(-2)V) core excited states of the K(-1) molecular ions have been identified by detecting in coincidence the photoelectron with the two Auger electrons resulting from the double core hole relaxation. A theoretical model is proposed providing absolute photoionization cross sections and revealing clear signatures of direct (monopolar) and conjugate (dipolar near-edge x-ray absorption fine structure) shakeup lines of comparable magnitude.
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Affiliation(s)
- M Nakano
- Department of Chemistry, Tokyo Institute of Technology, Tokyo 152855, Japan and Institute of Material Structural Science, Photon Factory, Tsukuba, Ibaraki 3050801, Japan
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18
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Nakano M, Penent F, Tashiro M, Grozdanov TP, Žitnik M, Carniato S, Selles P, Andric L, Lablanquie P, Palaudoux J, Shigemasa E, Iwayama H, Hikosaka Y, Soejima K, Suzuki IH, Kouchi N, Ito K. Single photon K(-2) and K(-1)K(-1) double core ionization in C(2)H(2n) (n=1-3), CO, and N(2) as a potential new tool for chemical analysis. Phys Rev Lett 2013; 110:163001. [PMID: 23679597 DOI: 10.1103/physrevlett.110.163001] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Indexed: 06/02/2023]
Abstract
We have observed single photon double K-shell photoionization in the C(2)H(2n) (n=1-3) hydrocarbon sequence and in N(2) and CO, using synchrotron radiation and electron coincidence spectroscopy. Our previous observations of the K(-2) process in these molecules are extended by the observations of a single photon double photoionization with one core hole created at each of the two neighboring atoms in the molecule (K(-1)K(-1) process). In the C(2)H(2n) sequence, the spectroscopy of K(-1)K(-1) states is much more sensitive to the bond length than conventional electron spectroscopy for chemical analysis spectroscopy based on single K-shell ionization. The cross section variation for single photon K(-1)K(-1) double core ionization in the C(2)H(2n) sequence and in the isoelectronic C(2)H(2n), N(2) and CO molecules validates a knock-out mechanism in which a primary ionized 1s photoelectron ejects another 1s electron of the neighbor atom. The specific Auger decay from such states is clearly observed in the CO case.
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Affiliation(s)
- M Nakano
- Photon Factory, Institute of Materials Structure Science, Oho, Tsukuba 305-0801, Japan
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19
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Huttula SM, Lablanquie P, Andric L, Palaudoux J, Huttula M, Sheinerman S, Shigemasa E, Hikosaka Y, Ito K, Penent F. Decay of a 2p inner-shell hole in an Ar(+) ion. Phys Rev Lett 2013; 110:113002. [PMID: 25166528 DOI: 10.1103/physrevlett.110.113002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Indexed: 06/03/2023]
Abstract
Direct measurements of the photoelectrons or Auger electrons associated with inner shell ionization of positively charged ions are extremely difficult and rarely realized. We propose an alternative method to simulate such measurements, based on core valence double photoionization of the neutral species. As an example, we obtain the spectroscopy, lifetimes, and Auger decays of the states arising from 2p inner shell ionisation of an Ar(+) ion. Observations compare well with theoretical predictions obtained within multiconfigurational Dirac-Fock formalism.
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Affiliation(s)
- S-M Huttula
- Department of Physics, University of Oulu, P.O. Box 3000, 90014 Oulu, Finland
| | - P Lablanquie
- UPMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France and CNRS, LCPMR (UMR 7614), 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - L Andric
- UPMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France and CNRS, LCPMR (UMR 7614), 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France and Université Paris-Est, F77454 Marne La Vallee 2, France
| | - J Palaudoux
- UPMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France and CNRS, LCPMR (UMR 7614), 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
| | - M Huttula
- Department of Physics, University of Oulu, P.O. Box 3000, 90014 Oulu, Finland
| | - S Sheinerman
- Department of Physics, St. Petersburg State Maritime Technical University, 198262 St. Petersburg, Russia
| | - E Shigemasa
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| | - Y Hikosaka
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan
| | - K Ito
- Photon Factory, Institute of Materials Structure Science, Oho, Tsukuba 305-0801, Japan
| | - F Penent
- UPMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France and CNRS, LCPMR (UMR 7614), 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
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20
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Iwayama H, Sisourat N, Lablanquie P, Penent F, Palaudoux J, Andric L, Eland JHD, Bučar K, Žitnik M, Velkov Y, Hikosaka Y, Nakano M, Shigemasa E. A local chemical environment effect in site-specific Auger spectra of ethyl trifluoroacetate. J Chem Phys 2013; 138:024306. [DOI: 10.1063/1.4773294] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Fushitani M, Hikosaka Y, Matsuda A, Liu CN, Morishita T, Shigemasa E, Hishikawa A. Ultrafast Nonlinear Double Excitations of He in Intense EUV FEL Fields. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134102009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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22
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Hikosaka Y, Matsuzaki R, Todoroki A, Mizutani Y. Enhancement of interfacial fracture toughness of carbon/epoxy composite adhesive joints by in-mold surface preparation. EXPRESS POLYM LETT 2013. [DOI: 10.3144/expresspolymlett.2013.26] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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23
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Hikosaka Y, Yamamoto K, Nakano M, Odagiri T, Soejima K, Suzuki IH, Lablanquie P, Penent F, Ito K. Communication: Formation of slow electrons in the Auger decay of core-ionized water molecules. J Chem Phys 2012. [DOI: 10.1063/1.4768213] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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24
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Hishikawa A, Fushitani M, Hikosaka Y, Matsuda A, Liu CN, Morishita T, Shigemasa E, Nagasono M, Tono K, Togashi T, Ohashi H, Kimura H, Senba Y, Yabashi M, Ishikawa T. Enhanced nonlinear double excitation of He in intense extreme ultraviolet laser fields. Phys Rev Lett 2011; 107:243003. [PMID: 22242995 DOI: 10.1103/physrevlett.107.243003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2011] [Indexed: 05/31/2023]
Abstract
Nonlinear, three-photon double excitation of He in intense extreme ultraviolet free-electron laser fields (∼24.1 eV, ∼5 TW/cm2) is presented. Resonances to the doubly excited states converging to the He+ N=3 level are revealed by the shot-by-shot photoelectron spectroscopy and identified by theoretical calculations based on the time-dependent Schrödinger equation for the two-electron atom under a laser field. It is shown that the three-photon double excitation is enhanced by intermediate Rydberg states below the first ionization threshold, giving a greater contribution to the photoionization yields than the two-photon process by more than 1 order of magnitude.
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Affiliation(s)
- A Hishikawa
- Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan.
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25
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Lablanquie P, Grozdanov TP, Zitnik M, Carniato S, Selles P, Andric L, Palaudoux J, Penent F, Iwayama H, Shigemasa E, Hikosaka Y, Soejima K, Nakano M, Suzuki IH, Ito K. Evidence of single-photon two-site core double ionization of C2H2 molecules. Phys Rev Lett 2011; 107:193004. [PMID: 22181603 DOI: 10.1103/physrevlett.107.193004] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Indexed: 05/31/2023]
Abstract
We observe the formation in a single-photon transition of two core holes, each at a different carbon atom of the C2H2 molecule. At a photon energy of 770.5 eV, the probability of this 2-site core double ionization amounts to 1.6 ± 0.4% of the 1-site core double ionization. A simple theoretical model based on the knockout mechanism gives reasonable agreement with experiment. Spectroscopy and Auger decays of the associated double core hole states are also investigated.
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Affiliation(s)
- P Lablanquie
- UPMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
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26
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Hikosaka Y, Lablanquie P, Penent F, Palaudoux J, Andric L, Soejima K, Shigemasa E, Suzuki IH, Nakano M, Ito K. Energy correlation among three photoelectrons emitted in core-valence-valence triple photoionization of Ne. Phys Rev Lett 2011; 107:113005. [PMID: 22026663 DOI: 10.1103/physrevlett.107.113005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Indexed: 05/31/2023]
Abstract
The direct observation of triple photoionization involving one inner shell and two valence electrons is reported. The energy distribution of the three photoelectrons emitted from Ne is obtained using a very efficient multielectron coincidence method using the magnetic bottle electron spectroscopic technique. A predominance of the direct path to triple photoionization for the formation of Ne3+ in the 1s 2s2 2p4 configuration is observed. It is demonstrated that the energy distribution evolves with photon energy and indicates a significant difference with triple photoionization involving only valence electrons.
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Affiliation(s)
- Y Hikosaka
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan
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27
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Penent F, Lablanquie P, Palaudoux J, Andric L, Gamblin G, Hikosaka Y, Ito K, Carniato S. Unveiling residual molecular binding in triply charged hydrogen bromide. Phys Rev Lett 2011; 106:103002. [PMID: 21469789 DOI: 10.1103/physrevlett.106.103002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Indexed: 05/30/2023]
Abstract
We present an experimental and theoretical study of triply charged hydrogen bromide ions formed by photoionization of the inner 3d shell of Br. The experimental results, obtained by detecting the 3d photoelectron in coincidence with the two subsequent Auger electrons, are analyzed using calculated potential energy curves of HBr3+. The competition between the short-range chemical binding potential and the Coulomb repulsion in the dissociative process is shown. Two different mechanisms are observed for double Auger decay: one, a direct process with simultaneous ejection of two Auger electrons to final HBr3+ ionic states and the other, a cascade process involving double Auger decay characterized by the autoionization of Br*+ ion subsequent to the HBr2+ fragmentation.
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Affiliation(s)
- F Penent
- UPMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
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28
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Lablanquie P, Penent F, Palaudoux J, Andric L, Selles P, Carniato S, Bučar K, Zitnik M, Huttula M, Eland JHD, Shigemasa E, Soejima K, Hikosaka Y, Suzuki IH, Nakano M, Ito K. Properties of hollow molecules probed by single-photon double ionization. Phys Rev Lett 2011; 106:063003. [PMID: 21405466 DOI: 10.1103/physrevlett.106.063003] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Indexed: 05/30/2023]
Abstract
The formation of hollow molecules (with a completely empty K shell in one constituent atom) through single-photon core double ionization has been demonstrated using a sensitive magnetic bottle experimental technique combined with synchrotron radiation. Detailed properties are presented such as the spectroscopy, formation, and decay dynamics of the N(2)(2+) K(-2) main and satellite states and the strong chemical shifts of double K holes on an oxygen atom in CO, CO2, and O2 molecules.
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Affiliation(s)
- P Lablanquie
- UPMC, Université Paris 06, LCPMR, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
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29
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Hikosaka Y, Kaneyasu T, Matsushita T, Tamenori Y, Shigemasa E. Dissociation of core-valence doubly excited states in NO followed by atomic Auger decay. J Chem Phys 2010; 133:154315. [PMID: 20969394 DOI: 10.1063/1.3505297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The decay processes of core-valence doubly excited states near the N K edge of NO have been studied using electron spectroscopy. Electron yields measured as a function of photon energy and kinetic energy enable the clear identification of atomic Auger lines associated with the dissociation of doubly excited states. The atomic Auger lines exhibit Doppler profiles, allowing the entire reaction scheme of such dissociation processes to be determined.
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Affiliation(s)
- Y Hikosaka
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan.
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30
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Hikosaka Y, Fushitani M, Matsuda A, Tseng CM, Hishikawa A, Shigemasa E, Nagasono M, Tono K, Togashi T, Ohashi H, Kimura H, Senba Y, Yabashi M, Ishikawa T. Multiphoton double ionization of Ar in intense extreme ultraviolet laser fields studied by shot-by-shot photoelectron spectroscopy. Phys Rev Lett 2010; 105:133001. [PMID: 21230767 DOI: 10.1103/physrevlett.105.133001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Indexed: 05/30/2023]
Abstract
Photoelectron spectroscopy has been performed to study the multiphoton double ionization of Ar in an intense extreme ultraviolet laser field (hν ∼ 21 eV, ∼ 5 TW/cm²), by using a free electron laser (FEL). Three distinct peaks identified in the observed photoelectron spectra clearly show that the double ionization proceeds sequentially via the formation of Ar(+): Ar+hν→Ar (+) + e⁻ and Ar²(+) + 2hν→Ar(+) + e⁻. Shot-by-shot recording of the photoelectron spectra allows simultaneous monitoring of FEL spectrum and the multiphoton process for each FEL pulse, revealing that the two-photon ionization from Ar(+) is significantly enhanced by intermediate resonances in Ar(+).
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Affiliation(s)
- Y Hikosaka
- Department of Environmental Science, Niigata University, Niigata 950-2181, Japan.
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31
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Eland JHD, Rigby CF, Andersson E, Palaudoux J, Andric L, Penent F, Linusson P, Hedin L, Karlsson L, Rubensson JE, Hikosaka Y, Ito K, Lablanquie P, Feifel R. Spectra of the triply charged ion CS(2)(3+) and selectivity in molecular Auger effects. J Chem Phys 2010; 132:104311. [PMID: 20232964 DOI: 10.1063/1.3352549] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Spectra of triply charged carbon disulphide have been obtained by measuring, in coincidence, all three electrons ejected in its formation by photoionization. Measurements of the CS(2)(3+) ion in coincidence with the three electrons identify the energy range where stable trications are formed. A sharp peak in this energy range is identified as the (2)Pi ground state at 53.1+/-0.1 eV, which is the lowest electronic state according to ab initio molecular orbital calculations. Triple ionization by the double Auger effect is provisionally divided, on the basis of the pattern of energy sharing between the two Auger electrons into contributions from direct and cascade Auger processes. The spectra from the direct double Auger effect via S 2p, S 2s, and C 1s hole states contain several resolved features and show selectivity based on the initial charge localization and on the identity of the initial state. Triple ionization spectra from single Auger decay of S 2p-based core-valence states CS(2)(2+) show retention of the valence holes in this Auger process. Related ion-electron coincidence measurements give the triple ionization yields and the breakdown patterns in triple photoionization at selected photon energies from 90 eV to above the inner shell edges.
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Affiliation(s)
- J H D Eland
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, United Kingdom
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32
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Hikosaka Y, Lablanquie P, Penent F, Kaneyasu T, Shigemasa E, Feifel R, Eland JHD, Ito K. Energy correlation of the three electrons emitted during the triple photoionization of Ar. Phys Rev Lett 2009; 102:013002. [PMID: 19257186 DOI: 10.1103/physrevlett.102.013002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2008] [Indexed: 05/27/2023]
Abstract
We report on an experimental investigation of energy correlation among three electrons emitted in valence triple photoionization (TPI) of Ar. The energy correlations reveal a predominant contribution from sequential TPI processes involving intermediate Ar2+ formation, which suggests that such indirect contributions should be included in the formulation of the threshold law for TPI cross sections. The differential cross section for direct TPI at about 150 eV above threshold producing one slow electron with a few eV kinetic energy is found to have a deeply hollow U-shaped profile in energy sharing between the other two electrons.
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Affiliation(s)
- Y Hikosaka
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
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Kaneyasu T, Hikosaka Y, Lablanquie P, Penent F, Andric L, Gamblin G, Eland JHD, Tamenori Y, Matsushita T, Shigemasa E. Mechanisms of spontaneous two-electron emission from core-excited states of molecular CO. Phys Rev Lett 2008; 101:183003. [PMID: 18999827 DOI: 10.1103/physrevlett.101.183003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2008] [Indexed: 05/27/2023]
Abstract
We demonstrate that the observation of slow electrons emitted in the decay of molecular core-excited states can be a sensitive probe of the double Auger processes, and that in combination with electron-electron coincidence spectroscopy, it can provide clear insight into the mechanisms involved. The present study identifies all cascade Auger paths from the C1s-to-Rydberg states in CO to final states of CO2+. One pathway includes the first directly identified case of molecular level-to-level autoionization of a cation and shows remarkable selectivity for a specific final state.
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Affiliation(s)
- T Kaneyasu
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
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Hikosaka Y, Velkov Y, Shigemasa E, Kaneyasu T, Tamenori Y, Liu J, Gel'mukhanov F. X-ray absorption measured in the resonant Auger scattering mode. Phys Rev Lett 2008; 101:073001. [PMID: 18764527 DOI: 10.1103/physrevlett.101.073001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2008] [Indexed: 05/26/2023]
Abstract
We report both experimental and theoretical studies on x-ray absorption measured in the resonant Auger scattering mode of gas phase carbon monoxide near the O1s-->2pi region. Both experiment and theory display a crucial difference between the x-ray absorption profiles obtained in the conventional and resonant scattering modes. Lifetime vibrational interference is the main source of the difference. It is demonstrated that such interference, which arises from a coherent excitation to overlapping intermediate levels, ruins the idea for obtaining x-ray absorption spectra in a lifetime broadening free regime.
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Affiliation(s)
- Y Hikosaka
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
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Hikosaka Y, Aoto T, Ito K, Terasaka Y, Hirayama R, Miyoshi E. Threshold photoelectron spectroscopy on inner-valence ionic states of NO. J Chem Phys 2008; 128:044320. [PMID: 18247962 DOI: 10.1063/1.2827463] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The NO(+) states lying in the ionization region of 20-40 eV have been investigated by high-resolution threshold photoelectron spectroscopy and a configuration interaction calculation. Substantial agreement between the structures on the present experimental and theoretical spectra in the 21-27 eV range enables us to assign the relevant inner-valence ionic states unambiguously. The dissociation products from the ion states are measured with threshold photoelectron-photoion coincidence spectroscopy, and the dissociation processes are discussed with reference to the potential energy curves calculated. Sharp peaks are observed in the ionization region of 27.5-35 eV, which are allocated to ionic Rydberg states converging to NO(2+).
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Affiliation(s)
- Y Hikosaka
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan.
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Lablanquie P, Aoto T, Hikosaka Y, Morioka Y, Penent F, Ito K. Appearance of interatomic Coulombic decay in Ar, Kr, and Xe homonuclear dimers. J Chem Phys 2007; 127:154323. [DOI: 10.1063/1.2778430] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Hikosaka Y, Kaneyasu T, Shigemasa E, Lablanquie P, Penent F, Ito K. Multielectron coincidence spectroscopy for core-valence doubly ionized states of CO. J Chem Phys 2007; 127:044305. [PMID: 17672688 DOI: 10.1063/1.2750341] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Double photoionization into states which have holes in one core and one valence orbitals has been observed in CO using a state-of-the-art multielectron coincidence method. The core-valence CO2+ structures exhibited on the electron coincidence spectra are assigned by comparison with the available calculation [H. Schulte et al., J. Chem. Phys. 105, 11108 (1996)]. Features of the spectrum confirm that the properties of the CO2+ states are characterized by the interaction between the localized valence holes and the core holes.
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Affiliation(s)
- Y Hikosaka
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
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Hikosaka Y, Lablanquie P, Penent F, Kaneyasu T, Shigemasa E, Eland JHD, Aoto T, Ito K. Double photoionization into double core-hole states in Xe. Phys Rev Lett 2007; 98:183002. [PMID: 17501570 DOI: 10.1103/physrevlett.98.183002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2007] [Indexed: 05/15/2023]
Abstract
Double photoionization (DPI) leading to double core-hole states of Xe2+ 4d(-2) has been studied using a magnetic bottle time-of-flight spectrometer. The assignments of the Xe2+ 4d(-2) states are confirmed by the Auger lines extracted from fourfold coincidences including two photoelectrons and two Auger electrons. It is estimated that the core-core DPI into Xe2+ 4d(-2) at a photon energy of 301.6 eV has a favored cross section of about 0.3 MB. The intense core-core DPI is due to mixing of the 4d(-2) continuum with the 4p single photoionization, which is manifested in the relative intensities of the Xe2+ 4d(-2) components.
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Affiliation(s)
- Y Hikosaka
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
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Aoto T, Ito K, Hikosaka Y, Shigemasa E, Penent F, Lablanquie P. Properties of resonant interatomic Coulombic decay in Ne dimers. Phys Rev Lett 2006; 97:243401. [PMID: 17280282 DOI: 10.1103/physrevlett.97.243401] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2006] [Indexed: 05/13/2023]
Abstract
Properties of the interatomic Coulombic decay (ICD) process in Ne dimers have been obtained by tracking the formation of energetic Ne+ ions. The double photoionization cross section, deduced from the Ne+/Ne+ coincidence signal, is dominated by the ICD process and presents a threshold 280 meV below the atomic Ne+2s(-1) threshold. Rydberg excitation of a 2s electron in the dimer creates molecular Rydberg states whose Sigma and Pi symmetries have been resolved. These excited states decay by a resonant ICD process releasing an energetic Ne+ ion and a neutral excited Ne* fragment. Subsequent autoionization of the Ne* fragment explains a double photoionization threshold below the dimer 2s ionization threshold.
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Affiliation(s)
- T Aoto
- Photon Factory, Institute of Materials Structure Science, Oho, Tsukuba 305-0801, Japan
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Nakashima Y, Yamada T, Tanahashi M, Hikosaka Y, Yoshitomi H, Niwa H. [A study of high-resolution computed tomography (HRCT) findings of resected small pulmonary nodules 2 cm or less in diameter with reference to the malignant nature]. Kyobu Geka 2006; 59:917-22. [PMID: 16986688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
To identify the characteristics of peripheral small lung mass lesions on high-resolution computed tomography (HRCT) and discriminate between malignant and benign, 223 mass lesions 2 cm or less resected surgically were evaluated about following points. 1) Density : 90.7% of lesions with mixed solid and ground-glass opacity (GGO) components were adenocarcinomas. Pure GGO lesions without scale-down between several months were all adenocarcinomas or atypical adenomatous hyperplasia (AAH). Thereby, patients with these findings are good candidates for surgical resection. 2) Spicular or pleural indentation :75.2% (88 of 117 cases) of adenocarcinomas and all squamous cell carcinomas (18 cases) showed these findings, but 26.6% (41 of 154 cases) of positive cases were benign lesion (non-specific inflammation, mycobacterisis, and so on). Accordingly, they are not peculiar to malignancy. 3) Satellite lesion : all lesions with this one showed benign, therefore it was thought that this finding could exclude malignant lesion. Thus, recognition of certain characteristics at HRCT can be helpful in discrimination between small malignant mass and benign mass.
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Affiliation(s)
- Yoshiaki Nakashima
- Department of Thoracic Surgery, Respiratory Disease Center, Seirei Mikatahara General Hospital, Hamamatsu, Japan
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Hikosaka Y, Aoto T, Lablanquie P, Penent F, Shigemasa E, Ito K. Experimental investigation of core-valence double photoionization. Phys Rev Lett 2006; 97:053003. [PMID: 17026099 DOI: 10.1103/physrevlett.97.053003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2006] [Indexed: 05/12/2023]
Abstract
Core-valence double photoionization has been observed in Ne atoms and N2 molecules using a magnetic-bottle time of flight spectrometer. The multielectron coincidence data sets give complete information on the energy correlations between all emitted electrons, which supports a detailed description of the core-valence double photoionization processes including direct spectroscopy of the core-valence doubly ionized states, the final states populated by their Auger decay and details of the dynamics of core-valence double photoionization for selected states.
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Affiliation(s)
- Y Hikosaka
- UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
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Yamada T, Tanahashi M, Moriyama T, Hikosaka Y, Yoshitomi H. [Assessment of surgery for stage IV non-small cell lung cancer]. Kyobu Geka 2006; 59:4-10. [PMID: 16440677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
We assessed the survival of surgery for stage IV non-small cell lung cancer. Forty-two patients were operated on lung cancer for stage IV from 1986 to 2005. Overall median survival time (MST) was 12.3 months and 5-year survival rate was 9.8%. There was significant difference in survival between pulmonary metastasis (pm2) and other sites metastasis (p<0.05). In pm2 patients there was significant difference between ipsilateral metastasis and contralateral metastasis (MST 21.9 months, 2-year survival rate 48.6%, 5-year survival rate 21.6% and MST 12.3 months, 2-year survival rate 0%) [p<0.05], and between complete resection and incomplete resection (MST 36 months, 2-year survival rate 64.8%, 5-year survival rate 28.8% and MST 12.3 months, 2-year survival rate 0%) [p<0.01]. In patients with brain metastasis, surgery of brain metastasis was better prognosis than radiation therapy (MST 12.5 months, 3-year survival rate 33.3% and MST 8.3 months, 2-year survival rate 0%) [NS].
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Affiliation(s)
- T Yamada
- Division of Thoracic Surgery, Respiratory Disease Center, Seirei Mikatahara General Hospital, Hamamatsu, Japan
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Yamada T, Nakashima Y, Tanahashi M, Hikosaka Y, Yoshitomi H, Niwa H. [The effect of multimodality induction therapy for locally advanced non-small cell lung cancer]. Kyobu Geka 2005; 58:969-75. [PMID: 16235845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
In this study we analyzed induction therapy for locally advanced non-small cell lung cancer. Eligible patients had mediastinoscopic proven N2 disease and T4 with mediastinal involvement. From January 1997 to May 2005, 56 patients entered the study. They received 2 cycle chemotherapy (platinums based 2 or 3 drugs), in 32 patients with concurrent radiotherapy followed by surgery. Response rates were 57.1%. Fifty-one patients underwent surgery. A radical resection was possible in 39 patients. Complication occurred in 14 patients (27.5%). Overall 5-year survival was 27.5%. In N2 disease, there was no statistically significant difference in survival between the induction group and the historical group. In T4 disease, overall 5-year survival was 30.2% for the induction group and 5.2% for historical group. There was significant difference in survival between the groups (p < 0.05).
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Affiliation(s)
- T Yamada
- Division of Thoracic Surgery, Respiratory Disease Center, Seirei Mikatahara General Hospital, Hamamatsu, Japan
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Aoto T, Hikosaka Y, Hall R, Ito K, Fernández J, Martı́n F. Dissociative photoionization of H2 at high photon energies: uncovering new series of doubly excited states. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.02.111] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kinugawa T, Hikosaka Y, Hodgekins AM, Eland JHD. New results on the dissociative photoionization of CF(4) and CCl(4). J Mass Spectrom 2002; 37:854-857. [PMID: 12203679 DOI: 10.1002/jms.345] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Using the VIPCO technique, we remeasured and completed the breakdown diagram of CCl(4) (+) up to 21 eV energy. The angle-resolved data show both orientation and alignment of photoelectrons relative to CX(3) (+) fragments from photoionization to the low-lying states of CF(4) (+) and CCl(4) (+). The strength of the orientation (forward/backward asymmetry) is surprising in view of the nearly spherical symmetry of the parent molecules, and calls for theoretical explanation. It may indicate that nuclear and electron motion take place on similar time-scales.
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Affiliation(s)
- T Kinugawa
- Physical and Theoretical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ, UK
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Gessner O, Hikosaka Y, Zimmermann B, Hempelmann A, Lucchese RR, Eland JHD, Guyon PM, Becker U. 4sigma(-1) inner valence photoionization dynamics of NO derived from photoelectron-photoion angular correlations. Phys Rev Lett 2002; 88:193002. [PMID: 12005630 DOI: 10.1103/physrevlett.88.193002] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2002] [Indexed: 05/23/2023]
Abstract
A complete description of the 4sigma photoionization dynamics of NO has been derived from angle resolved photoelectron-photoion-coincidence experiments. The combination of measurements performed with linearly and circularly polarized light has made it possible to obtain a unique set of complex dipole matrix elements. A comparison with multichannel-Schwinger-configuration-interaction calculations shows good agreement in the general shapes of the angular distributions due to the correct description of the main components and phase differences. Still, many transition moments agree only qualitatively.
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Affiliation(s)
- O Gessner
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
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Toyama T, Yamashita H, Hara Y, Hikosaka Y, Kobayashi S, Iwase H. Successful management of breast cancer with liver metastases with medroxyprogesterone acetate treatment. Int J Clin Oncol 2001; 6:306-9. [PMID: 11828951 DOI: 10.1007/s10147-001-8033-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A 38-year-old woman with cancer in the left breast underwent standard radical mastectomy. The estrogen receptor and progesterone receptor status of the primary tumor was unknown. Ten years after the surgery, a metastatic liver tumor was detected, and chemoendocrine therapy, consisting of cyclophosphamide, epirubicin, 5-fluorouracil (CEF) and medroxyprogesterone acetate (MPA) was initiated. The metastatic liver tumor showed a partial response after 11 cycles of such chemoendocrine therapy. Subsequently, MPA alone was given daily as maintenance therapy, and the disease has remained stable for 6 years. For women with metastatic breast cancer, complete remission is uncommon, and stable disease is a reasonable goal of successful therapy. In this respect, chemoendocrine therapy with CEF and MPA, followed by MPA alone as maintenance therapy, was successful in the patient reported here. Importantly, the patient's quality of life has remained favorable for several years after the partial response was achieved.
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Affiliation(s)
- T Toyama
- Department of Surgery II, Nagoya City University Medical School, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan.
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