Angle-Resolved 2D Imaging of Electron Emission Processes in Atoms and Molecules

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A variety of electron emission processes have been studied in detail for both atomic and molecular systems, using a highly efficient experimental system comprising two time-of-flight (TOF) rotatable electron energy analyzers and a 3rd generation synchrotron light source. Two examples are used here to illustrate the obtained results. Firstly, electron emissions in the HCL molecule have been mapped over a 14 eV wide photon energy range over the Cl 2p ionization threshold. Particular attention is paid to the dissociative core-excited states, for which the Auger electron emission shows photon energy dependent features. Also, the evolution of resonant Auger to the ... continued below

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Kukk, E.; Wills, A. A.; Langer, B.; Bozek, J. D. & Berrah, N. September 2, 2004.

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Description

A variety of electron emission processes have been studied in detail for both atomic and molecular systems, using a highly efficient experimental system comprising two time-of-flight (TOF) rotatable electron energy analyzers and a 3rd generation synchrotron light source. Two examples are used here to illustrate the obtained results. Firstly, electron emissions in the HCL molecule have been mapped over a 14 eV wide photon energy range over the Cl 2p ionization threshold. Particular attention is paid to the dissociative core-excited states, for which the Auger electron emission shows photon energy dependent features. Also, the evolution of resonant Auger to the normal Auger decay distorted by post-collision interaction has been observed and the resonating behavior of the valence photoelectron lines studied. Secondly, an atomic system, neon, in which excitation of doubly excited states and their subsequent decay to various accessible ionic states has been studied. Since these processes only occurs via inter-electron correlations, the many body dynamics of an atom can be probed, revealing relativistic effects, surprising in such a light atom. Angular distribution of the decay of the resonances to the parity unfavored continuum exhibits significant deviation from the LS coupling predictions.

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INIS; OSTI as DE00838948

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  • ATOMIC PROCESSES IN PLASMAS, Auburn, AL (US), 03/1998

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  • Report No.: LBNL--43476
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 838948
  • Archival Resource Key: ark:/67531/metadc787550

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 2, 2004

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  • Dec. 3, 2015, 9:30 a.m.

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  • Dec. 11, 2017, 2:37 p.m.

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Kukk, E.; Wills, A. A.; Langer, B.; Bozek, J. D. & Berrah, N. Angle-Resolved 2D Imaging of Electron Emission Processes in Atoms and Molecules, article, September 2, 2004; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc787550/: accessed April 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.