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McManus JW, Walmsley T, Nagaya K, Harries JR, Kumagai Y, Iwayama H, Ashfold MNR, Britton M, Bucksbaum PH, Downes-Ward B, Driver T, Heathcote D, Hockett P, Howard AJ, Kukk E, Lee JWL, Liu Y, Milesevic D, Minns RS, Niozu A, Niskanen J, Orr-Ewing AJ, Owada S, Rolles D, Robertson PA, Rudenko A, Ueda K, Unwin J, Vallance C, Burt M, Brouard M, Forbes R, Allum F. Disentangling sequential and concerted fragmentations of molecular polycations with covariant native frame analysis. Phys Chem Chem Phys 2022; 24:22699-22709. [PMID: 36106844 DOI: 10.1039/d2cp03029b] [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
We present results from an experimental ion imaging study into the fragmentation dynamics of 1-iodopropane and 2-iodopropane following interaction with extreme ultraviolet intense femtosecond laser pulses with a photon energy of 95 eV. Using covariance imaging analysis, a range of observed fragmentation pathways of the resulting polycations can be isolated and interrogated in detail at relatively high ion count rates (∼12 ions shot-1). By incorporating the recently developed native frames analysis approach into the three-dimensional covariance imaging procedure, contributions from three-body concerted and sequential fragmentation mechanisms can be isolated. The angular distribution of the fragment ions is much more complex than in previously reported studies for triatomic polycations, and differs substantially between the two isomeric species. With support of simple simulations of the dissociation channels of interest, detailed physical insights into the fragmentation dynamics are obtained, including how the initial dissociation step in a sequential mechanism influences rovibrational dynamics in the metastable intermediate ion and how signatures of this nuclear motion manifest in the measured signals.
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Affiliation(s)
- Joseph W McManus
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK
| | - Tiffany Walmsley
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK
| | - Kiyonobu Nagaya
- Department of Physics, Kyoto University, Kyoto, 606-8502, Japan
| | | | - Yoshiaki Kumagai
- Department of Applied Physics, Tokyo University of Agriculture and Technology, Koganei-shi, Tokyo 184-8588, Japan
| | - Hiroshi Iwayama
- UVSOR Synchrotron Facility, Institute for Molecular Science, Okazaki 444-8585, Japan
| | - Michael N R Ashfold
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK
| | - Mathew Britton
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA
| | - Philip H Bucksbaum
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA
| | - Briony Downes-Ward
- Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, UK
| | - Taran Driver
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA
| | - David Heathcote
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK
| | - Paul Hockett
- National Research Council of Canada, 100 Sussex Dr., Ottawa, ON K1A 0R6, Canada
| | - Andrew J Howard
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA
| | - Edwin Kukk
- Department of Physics and Astronomy, University of Turku, Turku, FI-20014, Finland
| | - Jason W L Lee
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany
| | - Yusong Liu
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA
| | - Dennis Milesevic
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK
| | - Russell S Minns
- Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, UK
| | - Akinobu Niozu
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Johannes Niskanen
- Department of Physics and Astronomy, University of Turku, Turku, FI-20014, Finland
| | - Andrew J Orr-Ewing
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK
| | - Shigeki Owada
- RIKEN SPring-8 Center, Sayo, Hyogo, 679-5148, Japan.,Japan Synchrotron Radiation Research Institute, Hyogo, Japan
| | - Daniel Rolles
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS, 66506, USA
| | - Patrick A Robertson
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK
| | - Artem Rudenko
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS, 66506, USA
| | - Kiyoshi Ueda
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, 980-8577, Japan
| | - James Unwin
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK
| | - Claire Vallance
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK
| | - Michael Burt
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK
| | - Mark Brouard
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK
| | - Ruaridh Forbes
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
| | - Felix Allum
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, UK.,Stanford PULSE Institute, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.,Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
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2
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Kosugi S, Koike F, Iizawa M, Oura M, Gejo T, Tamasaku K, Harries JR, Guillemin R, Piancastelli MN, Simon M, Azuma Y. Fluorescence Time Delay in Multistep Auger Decay as an Internal Clock. Phys Rev Lett 2020; 124:183001. [PMID: 32441980 DOI: 10.1103/physrevlett.124.183001] [Citation(s) in RCA: 1] [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: 11/13/2019] [Accepted: 04/14/2020] [Indexed: 06/11/2023]
Abstract
Differences in postcollision interaction (PCI) effects on Kr L_{3}M_{4,5}M_{4,5} Auger electron spectra were observed, depending on whether the initial photoionization occurred slightly above the K threshold or slightly above the L_{3} threshold. For the former, KL fluorescence emission most likely happens and then Auger processes due to the L_{3} hole follow. The time delay due to fluorescence causes a reduced shift of the Auger peak and tailing toward lower energy, since the Auger overtaking of the photoelectron happens later in time and at a location farther away from the ionic core, compared to the case for the simple one-step L_{3}M_{4,5}M_{4,5} Auger decay after L-shell photoionization. Time-dependent theory for PCI in multistep processes agrees well with experiment, illustrating the effect as an internal clock for the time-sequence of the dynamical process.
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Affiliation(s)
- S Kosugi
- Department of Materials and Life Sciences, Sophia University, Tokyo 102-8554, Japan
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - F Koike
- Department of Materials and Life Sciences, Sophia University, Tokyo 102-8554, Japan
| | - M Iizawa
- Department of Materials and Life Sciences, Sophia University, Tokyo 102-8554, Japan
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - M Oura
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - T Gejo
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
- Graduate School of Materials Science, University of Hyogo, Kamigori-cho, Ako-gun 678-1297, Japan
| | - K Tamasaku
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - J R Harries
- National Institutes for Quantum and Radiological Science and Technology, SPring-8, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan
| | - R Guillemin
- Sorbonne Université, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - M N Piancastelli
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
- Sorbonne Université, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
- Department of Physics and Astronomy, Uppsala University, Box 516, SE-75120 Uppsala, Sweden
| | - M Simon
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
- Sorbonne Université, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - Y Azuma
- Department of Materials and Life Sciences, Sophia University, Tokyo 102-8554, Japan
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
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Fukuzawa H, Lucchese RR, Liu XJ, Sakai K, Iwayama H, Nagaya K, Kreidi K, Schöffler MS, Harries JR, Tamenori Y, Morishita Y, Suzuki IH, Saito N, Ueda K. Probing molecular bond-length using molecular-frame photoelectron angular distributions. J Chem Phys 2019; 150:174306. [PMID: 31067899 DOI: 10.1063/1.5091946] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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 molecular-frame photoelectron angular distributions (MFPADs) in O 1s photoemission from CO2 molecule were measured. Patterns due to photoelectron diffractions were observed in the MFPADs. The polarization-averaged MFPADs were compared with theoretical calculation and were found to be useful in determining the molecular bond-length, which is a component to determine molecular structures.
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Affiliation(s)
- Hironobu Fukuzawa
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Robert R Lucchese
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Xiao-Jing Liu
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Kentaro Sakai
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Hiroshi Iwayama
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - Kiyonobu Nagaya
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - Katharina Kreidi
- Goeth-Universität Frankfurt am Main, Max-von-Laue-Str. 1, D-60438 Frankfurt, Germany
| | - Markus S Schöffler
- Goeth-Universität Frankfurt am Main, Max-von-Laue-Str. 1, D-60438 Frankfurt, Germany
| | - James R Harries
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
| | - Yusuke Tamenori
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5198, Japan
| | | | - Isao H Suzuki
- National Metrology Institute of Japan, AIST, Tsukuba 305-8568, Japan
| | - Norio Saito
- National Metrology Institute of Japan, AIST, Tsukuba 305-8568, Japan
| | - Kiyoshi Ueda
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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4
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Harries JR, Iwayama H, Kuma S, Iizawa M, Suzuki N, Azuma Y, Inoue I, Owada S, Togashi T, Tono K, Yabashi M, Shigemasa E. Superfluorescence, Free-Induction Decay, and Four-Wave Mixing: Propagation of Free-Electron Laser Pulses through a Dense Sample of Helium Ions. Phys Rev Lett 2018; 121:263201. [PMID: 30636148 DOI: 10.1103/physrevlett.121.263201] [Citation(s) in RCA: 3] [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: 09/18/2018] [Indexed: 06/09/2023]
Abstract
We report an experimental and numerical study of the propagation of free-electron laser pulses (wavelength 24.3 nm) through helium gas. Ionization and excitation populates the He^{+} 4p state. Strong, directional emission was observed at wavelengths of 469, 164, 30.4, and 25.6 nm. We interpret the emissions at 469 and 164 nm as 4p-3s-2p cascade superfluorescence, that at 30.4 nm as yoked superfluorescence on the 2p-1s transition, and that at 25.6 nm as free-induction decay of the 3p state.
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Affiliation(s)
| | - Hiroshi Iwayama
- UVSOR, IMS, Nishigo-Naka 38, Myodaiji, Okazaki, Aichi 444-8585, Japan
- SOKENDAI, Nishigo-Naka 38, Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - Susumu Kuma
- Atomic, Molecular, and Optical Physics Laboratory, RIKEN, Saitama 351-0198, Japan
| | - Masatomi Iizawa
- Faculty of Science and Technology, Sophia University, Kioicho 7-1, Chiyoda, Tokyo 102-8554, Japan
| | - Norihiro Suzuki
- Faculty of Science and Technology, Sophia University, Kioicho 7-1, Chiyoda, Tokyo 102-8554, Japan
| | - Yoshiro Azuma
- Faculty of Science and Technology, Sophia University, Kioicho 7-1, Chiyoda, Tokyo 102-8554, Japan
| | - Ichiro Inoue
- RIKEN SPring-8 Centre, Kouto 1-1-1, Sayo, Hyogo, 679-5148, Japan
| | - Shigeki Owada
- Japan Synchrotron Radiation Research Institute, Kouto 1-1-1, Sayo, Hyogo 679-5198, Japan
| | - Tadashi Togashi
- Japan Synchrotron Radiation Research Institute, Kouto 1-1-1, Sayo, Hyogo 679-5198, Japan
| | - Kensuke Tono
- Japan Synchrotron Radiation Research Institute, Kouto 1-1-1, Sayo, Hyogo 679-5198, Japan
| | - Makina Yabashi
- RIKEN SPring-8 Centre, Kouto 1-1-1, Sayo, Hyogo, 679-5148, Japan
| | - Eiji Shigemasa
- UVSOR, IMS, Nishigo-Naka 38, Myodaiji, Okazaki, Aichi 444-8585, Japan
- SOKENDAI, Nishigo-Naka 38, Myodaiji, Okazaki, Aichi 444-8585, Japan
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5
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Micke P, Kühn S, Buchauer L, Harries JR, Bücking TM, Blaum K, Cieluch A, Egl A, Hollain D, Kraemer S, Pfeifer T, Schmidt PO, Schüssler RX, Schweiger C, Stöhlker T, Sturm S, Wolf RN, Bernitt S, Crespo López-Urrutia JR. The Heidelberg compact electron beam ion traps. Rev Sci Instrum 2018; 89:063109. [PMID: 29960545 DOI: 10.1063/1.5026961] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Electron beam ion traps (EBITs) are ideal tools for both production and study of highly charged ions (HCIs). In order to reduce their construction, maintenance, and operation costs, we have developed a novel, compact, room-temperature design, the Heidelberg Compact EBIT (HC-EBIT). Four already commissioned devices operate at the strongest fields (up to 0.86 T) reported for such EBITs using permanent magnets, run electron beam currents up to 80 mA, and energies up to 10 keV. They demonstrate HCI production, trapping, and extraction of pulsed Ar16+ bunches and continuous 100 pA ion beams of highly charged Xe up to charge state 29+, already with a 4 mA, 2 keV electron beam. Moreover, HC-EBITs offer large solid-angle ports and thus high photon count rates, e.g., in x-ray spectroscopy of dielectronic recombination in HCIs up to Fe24+, achieving an electron-energy resolving power of E/ΔE > 1500 at 5 keV. Besides traditional on-axis electron guns, we have also implemented a novel off-axis gun for laser, synchrotron, and free-electron laser applications, offering clear optical access along the trap axis. We report on its first operation at a synchrotron radiation facility demonstrating the resonant photoexcitation of highly charged oxygen.
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Affiliation(s)
- P Micke
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - S Kühn
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - L Buchauer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - J R Harries
- National Institutes for Quantum and Radiological Science and Technology, SPring-8, Kouto 1-1-1, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - T M Bücking
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - K Blaum
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - A Cieluch
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - A Egl
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - D Hollain
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - S Kraemer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - T Pfeifer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - P O Schmidt
- Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
| | - R X Schüssler
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Ch Schweiger
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - T Stöhlker
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany
| | - S Sturm
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - R N Wolf
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - S Bernitt
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
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Nagasono M, Harries JR, Iwayama H, Togashi T, Tono K, Yabashi M, Senba Y, Ohashi H, Ishikawa T, Shigemasa E. Observation of free-electron-laser-induced collective spontaneous emission (superfluorescence). Phys Rev Lett 2011; 107:193603. [PMID: 22181606 DOI: 10.1103/physrevlett.107.193603] [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: 07/23/2011] [Indexed: 05/31/2023]
Abstract
We have observed and characterized 501.6 nm collective spontaneous emission (superfluorescence) following 1s(2) → 1s3p excitation of helium atoms by 53.7 nm free-electron laser radiation. Emitted pulse energies of up to 100 nJ are observed, corresponding to a photon number conversion efficiency of up to 10%. We observe the peak intensity to scale as ρ(2) and the emitted pulse width and delay to scale as ρ(-1), where ρ is the atom number density. Emitted pulses as short as 1 ps are observed, which corresponds to a rate around 75,000 times faster than the spontaneous 1s3p → 1s2s decay rate. To our knowledge, this is the first observation of superfluorescence following pumping in the extreme ultraviolet wavelength region, and extension of the technique to the generation of extreme ultraviolet and x-ray superfluorescence pulses should be straightforward by using suitable atomic systems and pump wavelengths.
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7
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Nagaoka SI, Fukuzawa H, Prümper G, Takemoto M, Takahashi O, Yamaguchi K, Kakiuchi T, Tabayashi K, Suzuki IH, Harries JR, Tamenori Y, Ueda K. A Study To Control Chemical Reactions Using Si:2p Core Ionization: Site-Specific Fragmentation. J Phys Chem A 2011; 115:8822-31. [DOI: 10.1021/jp203664r] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shin-ichi Nagaoka
- Department of Chemistry, Faculty of Science and Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Hironobu Fukuzawa
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Georg Prümper
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - Mai Takemoto
- Department of Chemistry, Faculty of Science and Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Osamu Takahashi
- Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Katsuhiro Yamaguchi
- Department of Chemistry, Faculty of Science and Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Takuhiro Kakiuchi
- Department of Chemistry, Faculty of Science and Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Kiyohiko Tabayashi
- Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Isao H. Suzuki
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801, Japan
| | - James R. Harries
- Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun 679-5198, Japan
| | - Yusuke Tamenori
- Japan Synchrotron Radiation Research Institute/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun 679-5198, Japan
| | - Kiyoshi Ueda
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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8
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Gejo T, Oura M, Kuniwake M, Honma K, Harries JR. Dissociation and recapture dynamics in H2O following O 1sinner-shell excitation. ACTA ACUST UNITED AC 2011. [DOI: 10.1088/1742-6596/288/1/012023] [Citation(s) in RCA: 7] [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: 11/12/2022]
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9
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Prümper G, Fukuzawa H, Rolles D, Sakai K, Prince KC, Harries JR, Tamenori Y, Berrah N, Ueda K. Is CO carbon KVV Auger electron emission affected by the photoelectron? Phys Rev Lett 2008; 101:233202. [PMID: 19113548 DOI: 10.1103/physrevlett.101.233202] [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: 08/01/2008] [Indexed: 05/27/2023]
Abstract
Angular distributions (ADs) of O+ fragments from C 1s photoexcited CO detected in coincidence with carbon KVV Auger electrons emitted in the horizontal direction were measured at photon energies of 298, 305, 320, and 450 eV. At 450 eV, the ADs are polarization-independent and coincide with the molecular-frame Auger electron angular distribution. All measured ADs can be rationalized as a product of the same molecular-frame Auger electron angular distribution and the axial selectivity in the photoionization process. Thus the interaction between the photoelectron and the Auger electron for the normal Auger decay of CO can be neglected, and the two-step model is a good approximation.
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Affiliation(s)
- G Prümper
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
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10
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Céolin D, Travnikova O, Bao Z, Piancastelli MN, Tanaka T, Hoshino M, Kato H, Tanaka H, Harries JR, Tamenori Y, Prümper C, Lischke T, Liu XJ, Ueda K. Study of the dissociation of nitrous oxide following resonant excitation of the nitrogen and oxygen K-shells. J Chem Phys 2008; 128:024306. [PMID: 18205449 DOI: 10.1063/1.2812926] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [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)
- D Céolin
- Department of Synchrotron Radiation Research, Institute of Physics, University of Lund, P.O. Box 118, SE-221 00 Lund, Sweden.
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11
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Tabayashi K, Yamamoto K, Takahashi O, Tamenori Y, Harries JR, Gejo T, Iseda M, Tamura T, Honma K, Suzuki IH, Nagaoka SI, Ibuki T. Inner-shell excitation spectroscopy and fragmentation of small hydrogen-bonded clusters of formic acid after core excitations at the oxygen K edge. J Chem Phys 2006; 125:194307. [PMID: 17129103 DOI: 10.1063/1.2387949] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [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
Inner-shell excitation spectra and fragmentation of small clusters of formic acid have been studied in the oxygen K-edge region by time-of-flight fragment mass spectroscopy. In addition to several fragment cations smaller than the parent molecule, we have identified the production of HCOOH.H+ and H3O+ cations characteristic of proton transfer reactions within the clusters. Cluster-specific excitation spectra have been generated by monitoring the partial ion yields of the product cations. Resonance transitions of O1s(C[double bond]O/OH) electrons into pi(CO)* orbital in the preedge region were found to shift in energy upon clusterization. A blueshift of the O1s(C[double bond]O)-->pi(CO)* transition by approximately 0.2 eV and a redshift of the O1s(OH)-->pi(CO)* by approximately 0.6 eV were observed, indicative of strong hydrogen-bond formation within the clusters. The results have been compared with a recent theoretical calculation, which supports the conclusion that the formic-acid clusters consist of the most stable cyclic dimer andor trimer units. Specifically labeled formic acid-d, HCOOD, was also used to examine the core-excited fragmentation mechanisms. These deuterium-labeled experiments showed that HDO+ was formed via site-specific migration of a formyl hydrogen within an individual molecule, and that HD2O+ was produced via the subsequent transfer of a deuterium atom from the hydroxyl group of a nearest-neighbor molecule within a cationic cluster. Deuteron (proton) transfer from the hydroxyl site of a hydrogen-bond partner was also found to take place, producing deuteronated HCOOD.D+ (protonated HCOOH.H+) cations within the clusters.
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Affiliation(s)
- Kiyohiko Tabayashi
- Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
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Ehara M, Nakatsuji H, Matsumoto M, Hatamoto T, Liu XJ, Lischke T, Prümper G, Tanaka T, Makochekanwa C, Hoshino M, Tanaka H, Harries JR, Tamenori Y, Ueda K. Symmetry-dependent vibrational excitation in N 1s photoionization of N2: Experiment and theory. J Chem Phys 2006; 124:124311. [PMID: 16599678 DOI: 10.1063/1.2181144] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [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
We have measured the vibrational structures of the N 1s photoelectron mainline and satellites of the gaseous N2 molecule with the resolution better than 75 meV. The gerade and ungerade symmetries of the core-ionized (mainline) states are resolved energetically, and symmetry-dependent angular distributions for the satellite emission allow us to resolve the Sigma and Pi symmetries of the shake-up (satellite) states. Symmetry-adapted cluster-expansion configuration-interaction calculations of the potential energy curves for the mainline and satellite states along with a Franck-Condon analysis well reproduce the observed vibrational excitation of the bands, illustrating that the theoretical calculations well predict the symmetry-dependent geometry relaxation effects. The energies of both mainline states and satellite states, as well as the splitting between the mainline gerade and ungerade states, are also well reproduced by the calculation: the splitting between the satellite gerade and ungerade states is calculated to be smaller than the experimental detection limit.
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Affiliation(s)
- M Ehara
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan.
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Lambourne JG, Penent F, Lablanquie P, Hall RI, Ahmad M, Zitnik M, Bucar K, Odling-Smee MK, Harries JR, Hammond P, Waterhouse DK, Stranges S, Richter R, Alagia M, Coreno M, Ferianis M. Experimental determination of the lifetime for the 2p3d(1P0) helium doubly excited state. Phys Rev Lett 2003; 90:153004. [PMID: 12732033 DOI: 10.1103/physrevlett.90.153004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2002] [Indexed: 05/24/2023]
Abstract
Two recent theoretical studies [C. Liu, Phys. Rev. A 64, 010501 (2001)]; M. Zitnik, ibid. 65, 032520 (2002)]] predict that the fluorescence lifetimes of helium doubly excited states converging to He+ N=2 should be longer than that of the He+ 2p ion state. This effect is caused by the electric field of the outer electron which, through Stark mixing, gives the inner fluorescing electron some series specific, stabilizing 2s character. We have obtained the first experimental evidence that confirms this effect by measuring the lifetime of the 2p3d(1P0) doubly excited state. This was determined to be 190+/-30 ps compared to 100 ps for the He+ 2p ion state. The measurements were performed using short pulses of synchrotron radiation to form doubly excited states and recording the arrival time of photons from fluorescence.
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Harries JR, Sullivan JP, Sternberg JB, Obara S, Suzuki T, Hammond P, Bozek J, Berrah N, Halka M, Azuma Y. Double photoexcitation of helium in a strong dc electric field. Phys Rev Lett 2003; 90:133002. [PMID: 12689282 DOI: 10.1103/physrevlett.90.133002] [Citation(s) in RCA: 7] [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: 08/09/2002] [Indexed: 05/24/2023]
Abstract
We report the first experimental measurements of the effect of an applied field on the photoexcitation and autoionization of doubly excited states of helium. Ground-state photoionization spectra have been measured in the region below the He+(N=2) threshold with static electric fields of up to 84.4 kV/cm across the interaction region. The results are compared to the theoretical calculations of Chung et al. [J. Phys. B 34, 165 (2001)]], which are the only calculations available in this regime. Transitions to several states in the N=2, n=6 manifold are assigned, and a wealth of new structure is observed. Our data show that many more series are mixed in by the field than those predicted by theory.
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Affiliation(s)
- James R Harries
- Photon Factory, IMSS, KEK, 1-1 Oho, Tsukuba-shi, Ibaraki-ken, 305-0801 Japan
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Harries JR, Ritchie AI. The effect of rehabilitation on the rate of oxidation of pyrite in a mine waste rock dump. Environ Geochem Health 1987; 9:27-36. [PMID: 24214183 DOI: 10.1007/bf01686172] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/1987] [Accepted: 06/17/1987] [Indexed: 06/02/2023]
Abstract
Temperature profiles within a mine waste rock dump undergoing pyritic oxidation have been used to estimate the rate of oxidation and the sites where oxidation was occurring. The waste rock dump is located at the abandoned Rum Jungle mine site in Northern Australia and was a major source of pollution to the local river system. The dump was rehabilitated in 1983-84 by reshaping to reduce erosion and covering with clay and soil to reduce infiltration of water.Heat source distributions were derived from temperature profiles measured in the dump. The oxidation of pyritic material is the main cause of heat in the dump, hence the rate and location of oxidation can be obtained from the distribution of heat sources. A comparison of the heat source distributions before and after rehabilitation showed that rehabilitation greatly reduced or stopped the oxidation of pyrite in the dump.
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Affiliation(s)
- J R Harries
- Australian Nuclear Science and Technology Organisation, Lucas Heights Research Laboratories, New Illawarra Road, 2234, Menai, NSW, Australia
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Siddiqui HJ, Gharib M, Muscat-Baron J, Harries JR. Liver abscess in Dubai. An analysis of 29 cases and an assessment of the value of CAT scan. Ann Trop Med Parasitol 1985; 79:281-6. [PMID: 4026439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The clinical features and management of 29 consecutive cases of liver abscess admitted to the Medical Division at the Rashid Hospital, Dubai, between February 1979 and March 1982 are reviewed and the value of CAT scan in the diagnosis and management is assessed.
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Abstract
A case of pulmonary hydatid disease with myopathy, which has not previously been described as a feature of hydatidosis, is reported. The myopathy resolved during high dose mebendazole therapy.
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Abstract
A case of tropical splenomegaly syndrome in a 66-year-old white man who had lived in Tanzania for 34 years is described. He had taken anti-malarial prophylaxis continuously and regularly. He had had malaria in 1955 but there was no history of alcoholism or jaundice. He was treated with proguanil hydrochloride and, after return to Tanzania, took paludrine as prophylactic. One year later he had no further complaints, the spleen was no longer palpable and the liver only just palpable.
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Suleiman MN, Muscat-Baron JM, Harries JR, Satti AG, Platt GS, Bowen ET, Simpson DI. Congo/Crimean haemorrhagic fever in Dubai. An outbreak at the Rashid Hospital. Lancet 1980; 2:939-41. [PMID: 6107588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A hospital outbreak of haemorrhagic fever took place in Dubai in November, 1979. The index case died in the casualty department shortly after admission. There were five secondary cases among hospital staff, two of whom died. When, 3 months after this outbreak, a patient with symptoms characteristic of haemorrhagic fever was admitted, immediate barrier nursing prevented further secondary cases.
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Nagpal VP, Harries JR. Single-dose doxycycline in the treatment of lobar pneumonia; comparative trial against procaine penicillin. East Afr Med J 1974; 51:778-81. [PMID: 4459078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Harries JR, Ruberti R. Pseudotumour cerebri in Africans. Afr J Med Sci 1973; 4:245-9. [PMID: 4356094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Harries JR. L-dopa in the treatment of Parkinsonism in Africans. East Afr Med J 1972; 49:112-5. [PMID: 5047267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Chopra SA, Harries JR. Dubin-Johnson syndrome: a case history and review of the literature. East Afr Med J 1971; 48:313-7. [PMID: 5136926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Harries JR. Myasthenia gravis in Kenya. Trans R Soc Trop Med Hyg 1969; 63:680-1. [PMID: 5824290 DOI: 10.1016/0035-9203(69)90192-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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Harries JR, Forrester AT, Bhardwaj VB, Bagshawe AF. Haemodynamics of big spleen disease. Preliminary communication. East Afr Med J 1965; 42:575-9. [PMID: 5861856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Harries JR. Respiratory paralysis in African children. East Afr Med J 1965; 42:479-83. [PMID: 5214573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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