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Iskandar W, Rescigno TN, Orel AE, Severt T, Larsen KA, Streeter ZL, Jochim B, Griffin B, Call D, Davis V, McCurdy CW, Lucchese RR, Williams JB, Ben-Itzhak I, Slaughter DS, Weber T. Efficiency of charge transfer in changing the dissociation dynamics of OD+ transients formed after the photo-fragmentation of D2O. J Chem Phys 2023; 159:094301. [PMID: 37668253 DOI: 10.1063/5.0159300] [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] [Received: 05/22/2023] [Accepted: 08/07/2023] [Indexed: 09/06/2023] Open
Abstract
We present an investigation of the relaxation dynamics of deuterated water molecules after direct photo-double ionization at 61 eV. We focus on the very rare D+ + O+ + D reaction channel in which the sequential fragmentation mechanisms were found to dominate the dynamics. Aided by theory, the state-selective formation and breakup of the transient OD+(a1Δ, b1Σ+) is traced, and the most likely dissociation path-OD+: a1Δ or b1Σ+ → A 3Π → X 3Σ- → B 3Σ--involving a combination of spin-orbit and non-adiabatic charge transfer transitions is determined. The multi-step transition probability of this complex transition sequence in the intermediate fragment ion is directly evaluated as a function of the energy of the transient OD+ above its lowest dissociation limit from the measured ratio of the D+ + O+ + D and competing D+ + D+ + O sequential fragmentation channels, which are measured simultaneously. Our coupled-channel time-dependent dynamics calculations reproduce the general trends of these multi-state relative transition rates toward the three-body fragmentation channels.
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Affiliation(s)
- W Iskandar
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - T N Rescigno
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - A E Orel
- Chemical Engineering, University of California, Davis, California 95616, USA
| | - T Severt
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - K A Larsen
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Graduate Group in Applied Science and Technology, University of California, Berkeley, California 94720, USA
| | - Z L Streeter
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Department of Chemistry, University of California, Davis, California 95616, USA
| | - B Jochim
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - B Griffin
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Department of Physics, University of Nevada, Reno, Nevada 89557, USA
| | - D Call
- Department of Physics, University of Nevada, Reno, Nevada 89557, USA
| | - V Davis
- Department of Physics, University of Nevada, Reno, Nevada 89557, USA
| | - C W McCurdy
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Department of Chemistry, University of California, Davis, California 95616, USA
| | - R R Lucchese
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - J B Williams
- Department of Physics, University of Nevada, Reno, Nevada 89557, USA
| | - I Ben-Itzhak
- J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, USA
| | - D S Slaughter
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Th Weber
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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Iskandar W, Rescigno TN, Orel AE, Larsen KA, Griffin B, Call D, Davis V, Jochim B, Severt T, Williams JB, Ben-Itzhak I, Slaughter DS, Weber T. Atomic autoionization in the photo-dissociation of super-excited deuterated water molecules fragmenting into D + + O + + D. Phys Chem Chem Phys 2023; 25:21562-21572. [PMID: 37545426 DOI: 10.1039/d3cp02438e] [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: 08/08/2023]
Abstract
We present the relaxation dynamics of deuterated water molecules via autoionization, initiated by the absorption of a 61 eV photon, producing the very rare D+ + O+ + D breakup channel. We employ the COLd target recoil ion momentum spectroscopy method to measure the 3D momenta of the ionic fragments and emitted electrons from the dissociating molecule in coincidence. We interpret the results using the potential energy surfaces extracted from multi-reference configuration interaction calculations. The measured particle energy distributions can be related to a super-excited monocationic state located above the double ionization threshold of D2O. The autoionized electron energy shows a sharp distribution centered around 0.5 eV, which is a signature of the atomic oxygen autoionization occurring in the direct and sequential dissociation processes of D2O+* at a large internuclear distance. In this way, an O+ radical fragment and a low-energy electron are created, both of which can trigger secondary reactions in their environment.
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Affiliation(s)
- W Iskandar
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA-94720, USA.
| | - T N Rescigno
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA-94720, USA.
| | - A E Orel
- Department of Chemical Engineering, University of California, Davis, CA-95616, USA
| | - K A Larsen
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA-94720, USA.
- Graduate Group in Applied Science and Technology, University of California, Berkeley, CA-94720, USA
| | - B Griffin
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA-94720, USA.
- Department of Physics, University of Nevada, Reno, NV-89557, USA
| | - D Call
- Department of Physics, University of Nevada, Reno, NV-89557, USA
| | - V Davis
- Department of Physics, University of Nevada, Reno, NV-89557, USA
| | - B Jochim
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS-66506, USA
| | - T Severt
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS-66506, USA
| | - J B Williams
- Department of Physics, University of Nevada, Reno, NV-89557, USA
| | - I Ben-Itzhak
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS-66506, USA
| | - D S Slaughter
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA-94720, USA.
| | - Th Weber
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA-94720, USA.
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3
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Slaughter DS, Weber T, Belkacem A, Trevisan CS, Lucchese RR, McCurdy CW, Rescigno TN. Selective bond-breaking in formic acid by dissociative electron attachment. Phys Chem Chem Phys 2020; 22:13893-13902. [PMID: 32542241 DOI: 10.1039/d0cp01522a] [Citation(s) in RCA: 3] [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: 11/21/2022]
Abstract
We report the results of a joint experimental and theoretical study of dissociative electron attachment to formic acid (HCOOH) in the 6-9 eV region, where H- fragment ions are a dominant product. Breaking of the C-H and O-H bonds is distinguished experimentally by deuteration of either site. We show that in this region H- ions can be produced by formation of two or possibly three Feshbach resonance (doubly-excited anion) states, one of which leads to either C-H or O-H bond scission, while the other can only produce formyloxyl radicals by O-H bond scission. Comparison of experimental and theoretical angular distributions of the anion fragment allows the elucidation of state specific pathways to dissociation.
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Affiliation(s)
- D S Slaughter
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
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4
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Lucchese RR, Rescigno TN, McCurdy CW. The Connection between Resonances and Bound States in the Presence of a Coulomb Potential. J Phys Chem A 2019; 123:82-95. [PMID: 30511875 DOI: 10.1021/acs.jpca.8b10715] [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: 11/30/2022]
Abstract
The connection between resonant metastable states and bound states with changing potential strength in the presence of a Coulomb potential is fundamentally different from the case of short-range potentials. This phenomenon is central to the physics of dissociative recombination of electrons with molecular cations. Here, it is verified computationally that there is no direct connection between the resonance pole of the S-matrix and any pole in the bound state spectrum. A detailed analysis is presented of the analytic structure of the scattering matrix, in which the resonance pole remains distinct in the complex k-plane while a new state appears in the bound state spectrum. A formulation of quantum-defect theory is developed based on the scattering matrix, which nonetheless exposes a close analytic relation between the resonant and bound state poles and thereby reveals the connection between quantum-defect theory and analytic S-matrix theory in the complex energy and momentum planes. One-channel and multichannel versions of the expressions with numerical examples for simple models are given, and the formalism is applied to give a unified picture of ab initio electronic structure and scattering calculations for e-O2+ and e-H2+ scattering.
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Affiliation(s)
- R R Lucchese
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - T N Rescigno
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - C W McCurdy
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States.,Department of Chemistry , University of California , Davis , California 95616 , United States
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5
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Larsen KA, Trevisan CS, Lucchese RR, Heck S, Iskandar W, Champenois E, Gatton A, Moshammer R, Strom R, Severt T, Jochim B, Reedy D, Weller M, Landers AL, Williams JB, Ben-Itzhak I, Dörner R, Slaughter D, McCurdy CW, Weber T, Rescigno TN. Resonance signatures in the body-frame valence photoionization of CF4. Phys Chem Chem Phys 2018; 20:21075-21084. [DOI: 10.1039/c8cp03637c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoionization of the 4t2 orbital of CF4 shows overlapping resonances close to threshold, leading to a striking inversion of the photoelectron angular distribution when viewed in the body-frame.
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6
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Waitz M, Metz D, Lower J, Schober C, Keiling M, Pitzer M, Mertens K, Martins M, Viefhaus J, Klumpp S, Weber T, Schmidt-Böcking H, Schmidt LPH, Morales F, Miyabe S, Rescigno TN, McCurdy CW, Martín F, Williams JB, Schöffler MS, Jahnke T, Dörner R. Two-Particle Interference of Electron Pairs on a Molecular Level. Phys Rev Lett 2016; 117:083002. [PMID: 27588854 DOI: 10.1103/physrevlett.117.083002] [Citation(s) in RCA: 4] [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: 05/18/2016] [Indexed: 06/06/2023]
Abstract
We investigate the photodouble ionization of H_{2} molecules with 400 eV photons. We find that the emitted electrons do not show any sign of two-center interference fringes in their angular emission distributions if considered separately. In contrast, the quasiparticle consisting of both electrons (i.e., the "dielectron") does. The work highlights the fact that nonlocal effects are embedded everywhere in nature where many-particle processes are involved.
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Affiliation(s)
- M Waitz
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - D Metz
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - J Lower
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - C Schober
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - M Keiling
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - M Pitzer
- Universität Kassel, Heinr.-Plett-Straße 40, 34132 Kassel, Germany
| | - K Mertens
- Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - M Martins
- Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - J Viefhaus
- FS-PE, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - S Klumpp
- FS-FL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - T Weber
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - H Schmidt-Böcking
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - L Ph H Schmidt
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - F Morales
- Max-Born-Institut, Max Born Strasse 2 A, D-12489 Berlin, Germany
| | - S Miyabe
- Attosecond Science Research Team, RIKEN Center for Advanced Photonics, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - T N Rescigno
- Ultrafast X-ray Science Laboratory, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - C W McCurdy
- Ultrafast X-ray Science Laboratory, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Department of Chemistry, University of California, Davis, California 95616, USA
| | - F Martín
- Departamento de Química, Universidad Autonoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autonoma de Madrid, 28049 Madrid, Spain
| | - J B Williams
- Department of Physics, University of Nevada Reno, 1664 North Virginia Street Reno, Nevada 89557, USA
| | - M S Schöffler
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - T Jahnke
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
| | - R Dörner
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
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7
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Abstract
The complex Kohn and polyatomic Schwinger variational techniques have been employed to illustrate the interchannel coupling correlation effects in the valence photoionization dynamics of SF6. Partial photoionization cross sections and asymmetry parameters of six valence subshells (1t1g, 5t1u, 1t2u, 3eg, 1t2g, 4t1u) are discussed in the framework of several theoretical and experimental studies. The complex Kohn results are in rather good agreement with experimental results, indicative of the fact that the interchannel coupling effects alter the photoionization dynamics significantly. We find that the dominant effect of interchannel coupling is to reduce the magnitude of shape resonant cross sections near the threshold and to induce resonant features in other channels to which resonances are coupled. The long-standing issue concerning ordering of the valence orbitals is addressed and confirmed 4t1u (6)1t2g (6)3eg (4)(5t1u (6)+1t2u (6)) 1t1g (6) as the most likely ordering.
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Affiliation(s)
- J Jose
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
| | - R R Lucchese
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA
| | - T N Rescigno
- Lawrence Berkeley National Laboratory, Chemical Sciences, Berkeley, California 94720, USA
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8
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Douguet N, Slaughter DS, Adaniya H, Belkacem A, Orel AE, Rescigno TN. Signatures of bond formation and bond scission dynamics in dissociative electron attachment to methane. Phys Chem Chem Phys 2015; 17:25621-8. [DOI: 10.1039/c5cp04178c] [Citation(s) in RCA: 11] [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: 11/21/2022]
Abstract
We show that a single T2 resonance can explain the 10 eV dissociative electron attachment peak in methane.
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Affiliation(s)
- N. Douguet
- Department of Chemical Engineering and Materials Science
- University of California
- Davis
- USA
| | - D. S. Slaughter
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - H. Adaniya
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - A. Belkacem
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - A. E. Orel
- Department of Chemical Engineering and Materials Science
- University of California
- Davis
- USA
| | - T. N. Rescigno
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
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9
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Yip FL, Rescigno TN, McCurdy CW, Martín F. Fully differential single-photon double ionization of neon and argon. Phys Rev Lett 2013; 110:173001. [PMID: 23679717 DOI: 10.1103/physrevlett.110.173001] [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] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 03/15/2013] [Indexed: 06/02/2023]
Abstract
Triply differential cross sections are calculated for one-photon double ionization of neon and argon at various photon energies and electron energy sharings by using a frozen-core treatment to represent the remaining electrons of the residual ion. Angular distributions agree well with all existing experimental data, showing that in spite of its simplicity the method can treat the double ionization of complex targets reliably. A comparison of the cross sections for helium, neon, and argon into the same final state symmetry at the same relative excess energies reveals a distinctive signature of the role of electron correlation in each target.
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Affiliation(s)
- F L Yip
- Departamento de Química, Modulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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10
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Williams JB, Trevisan CS, Schöffler MS, Jahnke T, Bocharova I, Kim H, Ulrich B, Wallauer R, Sturm F, Rescigno TN, Belkacem A, Dörner R, Weber T, McCurdy CW, Landers AL. Imaging polyatomic molecules in three dimensions using molecular frame photoelectron angular distributions. Phys Rev Lett 2012; 108:233002. [PMID: 23003951 DOI: 10.1103/physrevlett.108.233002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Indexed: 06/01/2023]
Abstract
We demonstrate a method for determining the full three-dimensional molecular-frame photoelectron angular distribution in polyatomic molecules using methane as a prototype. Simultaneous double Auger decay and subsequent dissociation allow measurement of the initial momentum vectors of the ionic fragments and the photoelectron in coincidence, allowing full orientation by observing a three-ion decay pathway, (H+, H+, CH2(+)). We find the striking result that at low photoelectron energies the molecule is effectively imaged by the focusing of photoelectrons along bond directions.
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Affiliation(s)
- J B Williams
- Department of Physics, Auburn University, Auburn, Alabama 36849, USA
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11
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Sann H, Jahnke T, Havermeier T, Kreidi K, Stuck C, Meckel M, Schöffler MS, Neumann N, Wallauer R, Voss S, Czasch A, Jagutzki O, Weber T, Schmidt-Böcking H, Miyabe S, Haxton DJ, Orel AE, Rescigno TN, Dörner R. Electron diffraction self-imaging of molecular fragmentation in two-step double ionization of water. Phys Rev Lett 2011; 106:133001. [PMID: 21517378 DOI: 10.1103/physrevlett.106.133001] [Citation(s) in RCA: 8] [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: 12/10/2010] [Indexed: 05/30/2023]
Abstract
We doubly ionize H(2)O by single photon absorption at 43 eV leading to H(+) + OH(+). A direct double ionization and a sequential process in which single ionization is followed by rapid dissociation into a proton and an autoionizing OH(*) are identified. The angular distribution of this delayed autoionization electron shows a preferred emission in the direction of the emitted proton. From this diffraction feature we obtain internuclear distances of 700 to 1100 a.u. at which the autoionization of the OH(*) occurs. The experimental findings are in line with calculations of the excited potential energy surfaces and their lifetimes.
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Affiliation(s)
- H Sann
- Institut für Kernphysik, J. W. Goethe Universität, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
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12
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Palacios A, Rescigno TN, McCurdy CW. Two-electron time-delay interference in atomic double ionization by attosecond pulses. Phys Rev Lett 2009; 103:253001. [PMID: 20366252 DOI: 10.1103/physrevlett.103.253001] [Citation(s) in RCA: 2] [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: 07/16/2009] [Revised: 10/04/2009] [Indexed: 05/29/2023]
Abstract
A two-color two-photon atomic double ionization experiment using subfemtosecond uv pulses can be designed such that the sequential two-color process dominates and one electron is ejected by each pulse. Nonetheless, ab initio calculations show that, for sufficiently short pulses, a prominent interference pattern in the joint energy distribution of the sequentially ejected electrons can be observed that is due to their indistinguishability and the exchange symmetry of the wave function.
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Affiliation(s)
- A Palacios
- Lawrence Berkeley National Laboratory, Chemical Sciences and Ultrafast X-ray Science Laboratory, Berkeley, California 94720, USA
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13
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Adaniya H, Rudek B, Osipov T, Haxton DJ, Weber T, Rescigno TN, McCurdy CW, Belkacem A. Imaging the molecular dynamics of dissociative electron attachment to water. Phys Rev Lett 2009; 103:233201. [PMID: 20366147 DOI: 10.1103/physrevlett.103.233201] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2009] [Indexed: 05/29/2023]
Abstract
Momentum imaging experiments on dissociative electron attachment (DEA) to a water molecule are combined with ab initio theoretical calculations of the angular dependence of the quantum mechanical amplitude for electron attachment to provide a detailed picture of the molecular dynamics of dissociation attachment via the two lowest energy Feshbach resonances. The combination of momentum imaging experiments and theory can reveal dissociation dynamics for which the axial recoil approximation breaks down and thus provides a powerful reaction microscope for DEA to polyatomics.
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Affiliation(s)
- H Adaniya
- Department of Applied Science, University of California, Davis, California 95616, USA
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14
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Horner DA, Miyabe S, Rescigno TN, McCurdy CW, Morales F, Martín F. Classical two-slit interference effects in double photoionization of molecular hydrogen at high energies. Phys Rev Lett 2008; 101:183002. [PMID: 18999826 DOI: 10.1103/physrevlett.101.183002] [Citation(s) in RCA: 11] [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: 07/06/2008] [Indexed: 05/27/2023]
Abstract
Recent experiments on double photoionization of H2 with photon energies between 160 and 240 eV have revealed body-frame angular distributions that suggest classical two-slit interference effects may be present when one electron carries most of the available energy and the second electron is not observed. We report precise quantum mechanical calculations that reproduce the experimental findings. They reveal that the interpretation in terms of classical diffraction is only appropriate at substantially higher photon energies. At the energies considered in the experiment we offer an alternative explanation based on the mixing of two nondiffractive contributions by circularly polarized light.
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Affiliation(s)
- D A Horner
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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15
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16
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Schöffler MS, Titze J, Petridis N, Jahnke T, Cole K, Schmidt LPH, Czasch A, Akoury D, Jagutzki O, Williams JB, Cherepkov NA, Semenov SK, McCurdy CW, Rescigno TN, Cocke CL, Osipov T, Lee S, Prior MH, Belkacem A, Landers AL, Schmidt-Böcking H, Weber T, Dörner R. Ultrafast probing of core hole localization in N2. Science 2008; 320:920-3. [PMID: 18487190 DOI: 10.1126/science.1154989] [Citation(s) in RCA: 159] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Although valence electrons are clearly delocalized in molecular bonding frameworks, chemists and physicists have long debated the question of whether the core vacancy created in a homonuclear diatomic molecule by absorption of a single x-ray photon is localized on one atom or delocalized over both. We have been able to clarify this question with an experiment that uses Auger electron angular emission patterns from molecular nitrogen after inner-shell ionization as an ultrafast probe of hole localization. The experiment, along with the accompanying theory, shows that observation of symmetry breaking (localization) or preservation (delocalization) depends on how the quantum entangled Bell state created by Auger decay is detected by the measurement.
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Affiliation(s)
- M S Schöffler
- Institut für Kernphysik, Johann Wolfgang Goethe-Universität Frankfurt am Main, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany.
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17
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Horner DA, Vanroose W, Rescigno TN, Martín F, McCurdy CW. Role of nuclear motion in double ionization of molecular hydrogen by a single photon. Phys Rev Lett 2007; 98:073001. [PMID: 17359020 DOI: 10.1103/physrevlett.98.073001] [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: 10/26/2006] [Indexed: 05/14/2023]
Abstract
We examine the origin of recently observed variations with internuclear distance (R) of the fully differential cross sections for double ionization of aligned H2 by absorption of a single photon. Using the results of fully converged numerical solutions of the Schrödinger equation, we show that these variations arise primarily from pronounced differences in the R dependence of the parallel and perpendicular components of the ionization amplitude. We also predict that R dependences should be readily observable in the asymmetry parameter for photodouble ionization, even in experimental measurements that are not differential in the energy sharings between ejected photoelectrons.
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Affiliation(s)
- D A Horner
- Lawrence Berkeley National Laboratory, Chemical Sciences, Berkeley, California 94720, USA
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Abstract
Low-energy electrons (<2 eV) can fragment gas phase formic acid (HCOOH) molecules through resonant dissociative attachment processes. Recent experiments have shown that the principal reaction products of such collisions are formate ions (HCOO-) and hydrogen atoms. Using first-principles electron scattering calculations, we have identified the responsible negative ion state as a transient pi* anion. Symmetry considerations dictate that the associated dissociation dynamics are intrinsically polyatomic: a second anion surface, connected to the first by a conical intersection, is involved in the dynamics and the transient anion must necessarily deform to nonplanar geometries before it can dissociate to the observed stable products.
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Affiliation(s)
- T N Rescigno
- Chemical Sciences, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA
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Vanroose W, Zhang Z, McCurdy CW, Rescigno TN. Threshold vibrational excitation of CO2 by slow electrons. Phys Rev Lett 2004; 92:053201. [PMID: 14995303 DOI: 10.1103/physrevlett.92.053201] [Citation(s) in RCA: 7] [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: 07/08/2003] [Indexed: 05/24/2023]
Abstract
Threshold structures, reminiscent of those seen in the polar hydrogen halides, have recently been observed in the cross sections for electron impact excitation of certain vibrational levels of the nonpolar CO2 molecule. These structures occur at energies outside the range where shape resonances dominate the dynamics. We propose a virtual state model that describes the multidimensional nuclear dynamics during the collision and explains quantitatively the selectivity observed in the excitation of the Fermi dyad, as well as the pattern of threshold peaks and oscillations seen in the upper levels of the higher polyads.
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Affiliation(s)
- Wim Vanroose
- Computing Sciences, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA
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Rescigno TN, Reinhardt WP. Extraction of accurate scattering information from apparently divergent Fredholm series: the centrifugal barrier. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3700/4/10/013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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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Rescigno TN, McCurdy CW, McKoy V. A relationship between the many-body theory of inelastic scattering and the distorted wave approximation. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3700/7/17/025] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Fliflet AW, McKoy V, Rescigno TN. Cross sections for excitation of the B3Πg, C3Πuand E3Σg+states of N2by low-energy electron impact in the distorted-wave approximation. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3700/12/19/013] [Citation(s) in RCA: 29] [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: 11/12/2022]
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McCurdy CW, Rescigno TN, McKoy V. A simple method for evaluating low-energy electron-molecule scattering cross sections using discrete basis functions. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3700/9/4/018] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Rescigno TN, Bender CF, McCurdy CW, McKoy V. Cross sections for the elastic scattering of low-energy electrons by molecular fluorine: an approximate theoretical treatment using discrete basis functions. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3700/9/12/026] [Citation(s) in RCA: 22] [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: 11/11/2022]
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Rescigno TN. Modeling hot, dense hydrogen with a classical spin dependent hamiltonian. Phys Rev Lett 2000; 84:4377-4380. [PMID: 10990690 DOI: 10.1103/physrevlett.84.4377] [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] [Subscribe] [Scholar Register] [Received: 05/13/1999] [Indexed: 05/23/2023]
Abstract
Hot, dense hydrogen is studied with a classical model in which the interaction energy between atoms depends on their internal spins as well as their separation distance. The spins are treated as classical variables. This model is used in Monte Carlo simulations to calculate internal energies, pressures, and pair correlation functions, as well as the Hugoniot for shocked liquid deuterium. The results clearly show the transition of hot, dense hydrogen from a molecular to an atomic fluid. Our results are in reasonable agreement with far more elaborate quantum mechanical simulations.
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Affiliation(s)
- TN Rescigno
- Physics Directorate, Lawrence Livermore National Laboratory, Livermore, California 94551, USA
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Abstract
Since the invention of quantum mechanics, even the simplest example of the collisional breakup of a system of charged particles, e(-) + H --> H(+) + e(-) + e(-) (where e(-) is an electron and H is hydrogen), has resisted solution and is now one of the last unsolved fundamental problems in atomic physics. A complete solution requires calculation of the energies and directions for a final state in which all three particles are moving away from each other. Even with supercomputers, the correct mathematical description of this state has proved difficult to apply. A framework for solving ionization problems in many areas of chemistry and physics is finally provided by a mathematical transformation of the Schrodinger equation that makes the final state tractable, providing the key to a numerical solution of this problem that reveals its full dynamics.
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Affiliation(s)
- TN Rescigno
- Lawrence Livermore National Laboratory, Physics Directorate, Livermore, CA 94551, USA. Department of Applied Science, University of California, Davis, Livermore, CA 94550, USA. Lawrence Berkeley National Laboratory, Computing Sciences, Berke
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Rescigno TN. Effective potential methods in variational treatments of electron‐molecule collisions. II. Application to HBr. J Chem Phys 1996. [DOI: 10.1063/1.470882] [Citation(s) in RCA: 10] [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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Rescigno TN, McCurdy CW. Effective potential methods in variational treatments of electron‐molecule collisions. I. Theoretical formulation. J Chem Phys 1996. [DOI: 10.1063/1.470881] [Citation(s) in RCA: 12] [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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Orel AE, Kulander KC, Rescigno TN. Effects of open inelastic channels in the resonant dissociative recombination of HeH+. Phys Rev Lett 1995; 74:4807-4810. [PMID: 10058604 DOI: 10.1103/physrevlett.74.4807] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Gil TJ, Lengsfield BH, McCurdy CW, Rescigno TN. Ab initio complex Kohn calculations of dissociative excitation of methane: Close-coupling convergence studies. Phys Rev A 1994; 49:2551-2560. [PMID: 9910532 DOI: 10.1103/physreva.49.2551] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Gil TJ, Rescigno TN, McCurdy CW, Lengsfield BH. Ab initio complex Kohn calculations of dissociative excitation of water. Phys Rev A 1994; 49:2642-2650. [PMID: 9910542 DOI: 10.1103/physreva.49.2642] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Rescigno TN, Lengsfield BH, Orel AE. Interchannel coupling and ground state correlation effects in the photoionization of CO. J Chem Phys 1993. [DOI: 10.1063/1.466010] [Citation(s) in RCA: 40] [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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Celiberto R, Rescigno TN. Dependence of electron-impact excitation cross sections on the initial vibrational quantum number in H2 and D2 molecules: X 1 Sigma g+-->B 1 Sigma u+ and 1 Sigma g+-->C 1 Pi u transitions. Phys Rev A 1993; 47:1939-1945. [PMID: 9909147 DOI: 10.1103/physreva.47.1939] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Gil TJ, McCurdy CW, Rescigno TN, Lengsfield BH. Polarization and correlation effects in elastic electron-Li2 scattering. Phys Rev A 1993; 47:255-263. [PMID: 9908918 DOI: 10.1103/physreva.47.255] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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McCurdy CW, Rescigno TN. Beyond the primitive separable exchange approximation in electron-molecule scattering. Phys Rev A 1992; 46:255-260. [PMID: 9907857 DOI: 10.1103/physreva.46.255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Rescigno TN, Lengsfield BH, McCurdy CW, Parker SD. Ab initio description of polarization in low-energy electron collisions with polar molecules: Application to electron-NH3 scattering. Phys Rev A 1992; 45:7800-7809. [PMID: 9906868 DOI: 10.1103/physreva.45.7800] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Rescigno TN, Schneider BI. Electron-impact excitation of the T and V states of ethylene: An ab initio study. Phys Rev A 1992; 45:2894-2902. [PMID: 9907321 DOI: 10.1103/physreva.45.2894] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Lengsfield BH, Rescigno TN. Electron-molecule close coupling with correlated target wave functions: Application to impact dissociation of F2. Phys Rev A 1991; 44:2913-2920. [PMID: 9906290 DOI: 10.1103/physreva.44.2913] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Schneider BI, Rescigno TN, Lengsfield BH, McCurdy CW. Accurate ab initio treatment of low-energy electron collisions with ethylene. Phys Rev Lett 1991; 66:2728-2730. [PMID: 10043601 DOI: 10.1103/physrevlett.66.2728] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Parker SD, McCurdy CW, Rescigno TN, Lengsfield BH. Electronic excitation of H2 by electron impact: Close-coupling calculations using the complex Kohn variational method. Phys Rev A 1991; 43:3514-3521. [PMID: 9905436 DOI: 10.1103/physreva.43.3514] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Schneider BI, Rescigno TN, McCurdy CW. Resonant vibrational excitation of H2CO by low-energy electron impact. Phys Rev A 1990; 42:3132-3134. [PMID: 9904387 DOI: 10.1103/physreva.42.3132] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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