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Kukk E, Niskanen J, Travnikova O, Berholts M, Kooser K, Peng D, Ismail I, Piancastelli MN, Püttner R, Hergerhahn U, Simon M. Orientational anisotropy due to molecular field splitting in sulfur 2p photoemission from CS 2 and SF 6 - theoretical treatment and application to photoelectron recoil. Phys Chem Chem Phys 2024; 26:21810-21820. [PMID: 39101747 DOI: 10.1039/d4cp01463d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/06/2024]
Abstract
Photoelectron recoil strongly modifies the high kinetic energy photoemission spectra from atoms and molecules as well as from surface structures. In most cases studied so far, photoemission from atomic-like inner-shell or core orbitals has been assumed to be isotropic in the molecular frame of reference. However, in the presence of molecular field splitting of p or d orbitals, this assumption is not justified per se. We present a general theoretical treatment, linking the orientational distribution of gas-phase molecules to the electron emission and detection in a certain direction in the laboratory frame. The approach is then applied to the S 2p photoemission from a linear molecule such as CS2 and we investigate, how the predicted orientational anisotropies due to molecular field splitting affect the photoelectron recoil excitations. Lastly, experimental S 2p high-kinetic-energy photoelectron spectra of SF6 and CS2 are analyzed using the modeled recoil lineshapes representing the anisotropy-affected recoil effects.
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Affiliation(s)
- Edwin Kukk
- Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland.
| | - Johannes Niskanen
- Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland.
| | - Oksana Travnikova
- Sorbonne Université, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - Marta Berholts
- Institute of Physics, University of Tartu, W. Ostwaldi 1, EE-50411 Tartu, Estonia
| | - Kuno Kooser
- Institute of Physics, University of Tartu, W. Ostwaldi 1, EE-50411 Tartu, Estonia
| | - Dawei Peng
- Sorbonne Université, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - Iyas Ismail
- Sorbonne Université, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - Maria Novella Piancastelli
- Sorbonne Université, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
| | - Ralph Püttner
- Fachbereich Physik, Freie Universität Berlin, D-14195 Berlin, Germany
| | - Uwe Hergerhahn
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Marc Simon
- Sorbonne Université, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
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Speranza G. Application of the Van Cittert Algorithm for Deconvolving Loss Features in X-ray Photoelectron Spectroscopy Spectra. MATERIALS (BASEL, SWITZERLAND) 2024; 17:763. [PMID: 38591627 PMCID: PMC10856702 DOI: 10.3390/ma17030763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/23/2024] [Accepted: 01/25/2024] [Indexed: 04/10/2024]
Abstract
The convolution of two physical entities, denoted as f and g, delineates the manner in which one entity undergoes modification in response to the other. This transformative process is mathematically represented by the expression f ⨂ g, symbolizing the convolution of the two entities in a resultant function h. Frequently, it becomes imperative to comprehend the magnitude of the induced modifications. From the derived function h, a crucial step involves the separation of the two original signals, a process commonly referred to as deconvolution. Various techniques have been proposed to facilitate the calculation of the deconvolution, with one notable approach originating in 1931 by van Cittert. The algorithm, based on an iterative method, has been scrutinized over time, notably by Bracewell and, more recently, by Jansson. This work represents the current state-of-the-art, focusing specifically on the analysis of Auger spectra obtained through XPS. Emphasis is placed on delineating the procedural aspects of the analysis, and the algorithm utilized in the open-source software RxpsG is comprehensively described.
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Affiliation(s)
- Giorgio Speranza
- Fondazione Bruno Kessler, v. Sommarive 18, 38123 Trento, Italy;
- Department of Industrial Engineering, University of Trento, v. Sommarive 9, 38123 Trento, Italy
- IFN-CNR, CSMFO Laboratory, v. alla Cascata 56/C, 38123 Trento, Italy
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Eland JHD, Fink RF, Linusson P, Hedin L, Plogmaker S, Feifel R. Single and multiple photoionisation of H2S by 40–250 eV photons. Phys Chem Chem Phys 2011; 13:18428-35. [DOI: 10.1039/c1cp21654f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Travnikova O, Fink RF, Kivimäki A, Céolin D, Bao Z, Piancastelli MN. Assignment of the L2,3VV normal Auger decay spectrum of Cl2 by ab initio calculations. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.04.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Fink RF, Piancastelli MN, Grum-Grzhimailo AN, Ueda K. Angular distribution of Auger electrons from fixed-in-space and rotating C 1s-->2pi photoexcited CO: theory. J Chem Phys 2009; 130:014306. [PMID: 19140614 DOI: 10.1063/1.3042153] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The one-center approach for molecular Auger decay is applied to predict the angular distribution of Auger electrons from rotating and fixed-in-space molecules. For that purpose, phase shifts between the Auger decay amplitudes have been incorporated in the atomic model. The approach is applied to the resonant Auger decay of the photoexcited C 1s-->2pi resonance in carbon monoxide. It is discussed how the symmetry of the final ionic state is related to features in the angular distributions and a parametrization for the molecular frame Auger electron angular distribution is suggested. The angular distribution of Auger electrons after partial orientation of the molecule by the sigma-->pi-excitation process is also calculated and compared to available experimental and theoretical data. The results of the one-center approach are at least of the same quality as the available theoretical data even though the latter stem from a much more sophisticated method. As the one-center approximation can be applied with low computational demand even to extended systems, the present approach opens a way to describe the angular distribution of Auger electrons in a wide variety of applications.
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Affiliation(s)
- R F Fink
- Institute of Organic Chemistry, University of Würzburg, D-97074 Würzburg, Germany.
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6
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Travnikova O, Fink RF, Kivimäki A, Céolin D, Bao Z, Piancastelli MN. Disentangling the complex line profiles in the Cl 2p photoelectron spectra of Cl2. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.06.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Guillemin R, Stolte WC, Dang LTN, Yu SW, Lindle DW. Fragmentation dynamics of H2S following S 2p photoexcitation. J Chem Phys 2005; 122:094318. [PMID: 15836139 DOI: 10.1063/1.1860012] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The fragmentation dynamics of core-excited H(2)S has been studied by means of partial anion and cation yield measurements around the S L(2,3)-subshell ionization thresholds. All detectable ionic fragments are reported, and significant differences between partial ion yields are observed. Possible dissociation pathways are discussed by comparison to previous studies of electron spectra.
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Affiliation(s)
- R Guillemin
- Department of Chemistry, University of Nevada, Las Vegas, Nevada 89154-4003, USA
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Turri G, Snell G, Langer B, Martins M, Kukk E, Canton SE, Bilodeau RC, Cherepkov N, Bozek JD, Kilcoyne AL, Berrah N. Probing the molecular environment using spin-resolved photoelectron spectroscopy. PHYSICAL REVIEW LETTERS 2004; 92:013001. [PMID: 14753986 DOI: 10.1103/physrevlett.92.013001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2003] [Indexed: 05/24/2023]
Abstract
Angle- and spin-resolved photoelectron spectroscopy with linearly and circularly polarized synchrotron radiation were used to study the electronic structure of model triatomic molecules, hydrogen sulfide, and carbonyl sulfide. The spin-polarization measurements of the molecular field split components of the S 2p photolines revealed a strong effect of the different molecular environments. The validity of simple atomic models to explain the results is discussed.
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Affiliation(s)
- G Turri
- Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008, USA
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Kosugi N, Ishida T. Molecular field and spin–orbit splittings in the 2p ionization of second-row elements: a Breit–Pauli approximation applied to OCS, SO2, and PF3. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)01005-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Fink RF, Kivilompolo M, Aksela H. Theory and ab initio calculations of 2p photoabsorption spectra: The lowest Rydberg resonances in HCl. J Chem Phys 1999. [DOI: 10.1063/1.480339] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bo/rve KJ, Thomas TD. Molecular-field splitting of the 2p3/2 peak in x-ray photoelectron spectra of second-row atoms: A theoretical study of phosphine and phosphorus trifluoride. J Chem Phys 1999. [DOI: 10.1063/1.479211] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Naves de Brito A, Svensson S, Osborne SJ, Ausmees A, Kivimäki A, Sairanen OP, Nõmmiste E, Aksela H, Aksela S, Saethre LJ. Auger decay of the molecular field split S 2p core excited states in HS radical. J Chem Phys 1997. [DOI: 10.1063/1.473035] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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