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Hikosaka Y. A virtual stretch of light pulse interval by pulsed electron extraction introduced into a magnetic bottle electron spectrometer. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2019; 90:053105. [PMID: 31153290 DOI: 10.1063/1.5093465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 04/21/2019] [Indexed: 06/09/2023]
Abstract
A pulsed extraction of electrons associated with a single light pulse is introduced into electron time-of-flight measurement by using a magnetic bottle electron spectrometer. The pulsed extraction enables us to observe long times-of-flight of electrons with synchrotron radiation pulses of short periods. The feasibility and the performance of this method are demonstrated by multielectron coincidence measurements for Xe 4d excitation/ionization.
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Affiliation(s)
- Yasumasa Hikosaka
- Institute of Liberal Arts and Sciences, University of Toyama, Toyama 930-0194, Japan
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Abundance of molecular triple ionization by double Auger decay. Sci Rep 2018; 8:16405. [PMID: 30401877 PMCID: PMC6219609 DOI: 10.1038/s41598-018-34807-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 10/26/2018] [Indexed: 11/29/2022] Open
Abstract
Systematic measurements of electron emission following formation of single 1s or 2p core holes in molecules with C, O, F, Si, S and Cl atoms show that overall triple ionization can make up as much as 20% of the decay. The proportion of triple ionization is observed to follow a linear trend correlated to the number of available valence electrons on the atom bearing the initial core hole and on closest neighbouring atoms, where the interatomic distance is assumed to play a large role. The amounts of triple ionization (double Auger decay) after 1s or 2p core hole formation follow the same linear trend, which indicates that the hole identity is not a crucial determining factor in the number of electrons emitted. The observed linear trend for the percentage of double Auger decay follows a predictive line equation of the form DA = 0.415 · Nve + 5.46.
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Roos AH, Eland JHD, Andersson J, Zagorodskikh S, Singh R, Squibb RJ, Feifel R. Relative extent of double and single Auger decay in molecules containing C, N and O atoms. Phys Chem Chem Phys 2018; 18:25705-25710. [PMID: 27711372 DOI: 10.1039/c6cp02414a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We show that the proportion of double Auger decay following creation of single 1s core holes in molecules containing C, N and O atoms is greater than usually assumed, amounting to about 10% of single Auger decay in many cases. It varies from molecule to molecule, where the size of the molecule has a positive correlation to the amount of double Auger decay. In neon, examined as a related benchmark, the proportion of double Auger decay is similar to that in methane, and is in the order of 5%.
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Affiliation(s)
- A Hult Roos
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 96 Gothenburg, Sweden.
| | - J H D Eland
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 96 Gothenburg, Sweden. and Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, UK
| | - J Andersson
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 96 Gothenburg, Sweden.
| | - S Zagorodskikh
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 96 Gothenburg, Sweden. and Department of Physics and Astronomy, Uppsala University, Box 516, 751 20 Uppsala, Sweden
| | - R Singh
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 96 Gothenburg, Sweden.
| | - R J Squibb
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 96 Gothenburg, Sweden.
| | - R Feifel
- Department of Physics, University of Gothenburg, Origovägen 6B, 412 96 Gothenburg, Sweden.
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Varas LR, Coutinho LH, Bernini RB, Betancourt A, de Moura CEV, Rocha AB, de Souza GGB. Breaking the disulfide chemical bond using high energy photons: the dimethyl disulfide and methyl propyl disulfide molecules. RSC Adv 2017. [DOI: 10.1039/c7ra05001a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In order to study the stability of the disulfide chemical bond in molecules subjected to a flux of high energy photons, the ionic fragmentation of DMDS and MPDS has been studied following excitation around the S 1s edge (∼2470 eV).
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Affiliation(s)
- L. R. Varas
- Escuela de Ingeniería Química
- Universidad de Costa Rica
- Sede Central Rodrigo Facio
- Facultad de Ingeniería
- 11501-2060 San José
| | - L. H. Coutinho
- Instituto de Física
- Universidade Federal do Rio de Janeiro
- Cidade Universitária
- Rio de Janeiro
- Brazil
| | - R. B. Bernini
- Instituto Federal de Ciência e Tecnologia do Rio de Janeiro (IFRJ)
- Duque de Caxias
- Brazil
| | - A. M. Betancourt
- Escuela de Ingeniería Química
- Universidad de Costa Rica
- Sede Central Rodrigo Facio
- Facultad de Ingeniería
- 11501-2060 San José
| | - C. E. V. de Moura
- Instituto de Química
- Universidade Federal do Rio de Janeiro
- Cidade Universitária
- Rio de Janeiro
- Brazil
| | - A. B. Rocha
- Instituto de Química
- Universidade Federal do Rio de Janeiro
- Cidade Universitária
- Rio de Janeiro
- Brazil
| | - G. G. B. de Souza
- Instituto de Química
- Universidade Federal do Rio de Janeiro
- Cidade Universitária
- Rio de Janeiro
- Brazil
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Zagorodskikh S, Zhaunerchyk V, Mucke M, Eland J, Squibb R, Karlsson L, Linusson P, Feifel R. Single-photon double and triple ionization of acetaldehyde (ethanal) studied by multi-electron coincidence spectroscopy. Chem Phys 2015. [DOI: 10.1016/j.chemphys.2015.10.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Li Z, Vendrell O, Santra R. Ultrafast Charge Transfer of a Valence Double Hole in Glycine Driven Exclusively by Nuclear Motion. PHYSICAL REVIEW LETTERS 2015; 115:143002. [PMID: 26551809 DOI: 10.1103/physrevlett.115.143002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Indexed: 06/05/2023]
Abstract
We explore theoretically the ultrafast transfer of a double electron hole between the functional groups of glycine after K-shell ionization and subsequent Auger decay. Although a large energy gap of about 15 eV initially exists between the two electronic states involved and coherent electronic dynamics play no role in the hole transfer, we find that the double hole is transferred within 3 to 4 fs between both functional ends of the glycine molecule driven solely by specific nuclear displacements and non-Born-Oppenheimer effects. The nuclear displacements along specific vibrational modes are of the order of 15% of a typical chemical bond between carbon, oxygen, and nitrogen atoms and about 30% for bonds involving hydrogen atoms. The time required for the hole transfer corresponds to less than half a vibrational period of the involved nuclear modes. This finding challenges the common wisdom that nuclear dynamics of the molecular skeleton are unimportant for charge transfer processes at the few-femtosecond time scale and shows that they can even play a prominent role. It also indicates that in x-ray imaging experiments, in which ionization is unavoidable, valence electron redistribution caused by nuclear dynamics might be much faster than previously anticipated. Thus, non-Born-Oppenheimer effects may affect the apparent electron densities extracted from such measurements.
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Affiliation(s)
- Zheng Li
- Center for Free-Electron Laser Science, DESY, Notkestraß e 85, D-22607 Hamburg, Germany
- Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, D-22761 Hamburg, Germany
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Oriol Vendrell
- Center for Free-Electron Laser Science, DESY, Notkestraß e 85, D-22607 Hamburg, Germany
- Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, D-22761 Hamburg, Germany
| | - Robin Santra
- Center for Free-Electron Laser Science, DESY, Notkestraß e 85, D-22607 Hamburg, Germany
- Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, D-22761 Hamburg, Germany
- Department of Physics, University of Hamburg, Jungiusstraße 9, D-20355 Hamburg, Germany
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Saha K, Banerjee SB, Bapat B. Three body dissociation of CS2(2+) subsequent to various S(2p) Auger transitions. J Chem Phys 2013; 139:164309. [PMID: 24182031 DOI: 10.1063/1.4826468] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Fragmentation kinematics of CS2 following various S(2p) Auger transitions is studied. Employing a combination of electron energy analysis and recoil ion momentum spectroscopy, changes in the dissociation channel yields, as well as the differences in the kinematical parameters for various bands of Auger hole states are presented. The fragmentation mechanism for dissociative channels leading to complete atomization of CS2(2+) molecular ion is studied in detail. We find that CS2(2+) does not retain linear geometry and is bent before undergoing concerted break-up. It is also observed that different geometric configurations of the CS2(2+) precursor result in different kinetic energy release values.
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Affiliation(s)
- K Saha
- Physical Research Laboratory, Navrangpura, Ahmedabad 380009, India
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Fletcher JD, Parkes MA, Price SD. Bond-Forming Reactions of Small Triply Charged Cations with Neutral Molecules. Chemistry 2013; 19:10965-70. [DOI: 10.1002/chem.201301861] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Indexed: 11/10/2022]
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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. PHYSICAL REVIEW LETTERS 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] [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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Lablanquie P, Huttula SM, Huttula M, Andric L, Palaudoux J, Eland JHD, Hikosaka Y, Shigemasa E, Ito K, Penent F. Multi-electron spectroscopy: Auger decays of the argon 2s hole. Phys Chem Chem Phys 2011; 13:18355-64. [PMID: 21779590 DOI: 10.1039/c1cp21546a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Auger decay of an inner shell hole is an efficient way to create multiply charged ions in the gas phase. We illustrate this with the example of the argon 2s decay, and show that multi-electron coincidence spectroscopy between the 2s photoelectron and all released Auger electrons leads to a complete reconstruction of the Ar 2s decay cascade. Spectra of the intermediate and final Ar(n+) states are obtained and are compared with a theoretical model.
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Affiliation(s)
- Pascal Lablanquie
- CNRS, LCPMR (UMR 7614), 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France.
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Eland JHD, Andric L, Linusson P, Hedin L, Plogmaker S, Palaudoux J, Penent F, Lablanquie P, Feifel R. Triple ionization of CO2 by valence and inner shell photoionization. J Chem Phys 2011; 135:134309. [DOI: 10.1063/1.3643121] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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12
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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. PHYSICAL REVIEW LETTERS 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] [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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