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Title: Auger decay of 1 σ g and 1 σ u hole states of the N 2 molecule: Disentangling decay routes from coincidence measurements

Abstract

Results of the most sophisticated measurements in coincidence with the angular-resolved K-shell photoelectrons and Auger electrons and with two atomic ions produced by dissociation of N2 molecule are analyzed. Detection of photoelectrons at certain angles makes it possible to separate the Auger decay processes of the 1σg and 1σu core-hole states. The Auger electron angular distributions for each of these hole states are measured as a function of the kinetic-energy release of two atomic ions and are compared with the corresponding theoretical angular distributions. From that comparison one can disentangle the contributions of different repulsive doubly charged molecular ion states to the Auger decay. Different kinetic-energy-release values are directly related to the different internuclear distances. In this way one can trace experimentally the behavior of the potential energy curves of dicationic final states inside the Frank-Condon region. Presentation of the Auger-electron angular distributions as a function of kinetic-energy release of two atomic ions opens a new dimension in the study of Auger decay.

Authors:
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2];  [3];  [2];  [4];  [5];  [5];  [5];  [5];  [4];  [2];  [5];  [6];  [2]
  1. State Univ. of Aerospace Instrumentation, St. Petersburg (Russian Federation)
  2. Univ. of Frankfurt (Germany)
  3. Univ. of Frankfurt (Germany); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. Auburn Univ., AL (United States)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  6. State Univ. of Aerospace Instrumentation, St. Petersburg (Russian Federation); Univ. of Frankfurt (Germany)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Chemical Sciences, Geosciences & Biosciences Division (SC-22.1)
OSTI Identifier:
1511319
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 81; Journal Issue: 4; Journal ID: ISSN 1050-2947
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

Semenov, S. K., Schöffler, M. S., Titze, J., Petridis, N., Jahnke, T., Cole, K., Schmidt, L. Ph. H., Czasch, A., Akoury, D., Jagutzki, O., Williams, J. B., Osipov, T., Lee, S., Prior, M. H., Belkacem, A., Landers, A. L., Schmidt-Böcking, H., Weber, Th., Cherepkov, N. A., and Dörner, R. Auger decay of 1σg and 1σu hole states of the N2 molecule: Disentangling decay routes from coincidence measurements. United States: N. p., 2010. Web. doi:10.1103/PhysRevA.81.043426.
Semenov, S. K., Schöffler, M. S., Titze, J., Petridis, N., Jahnke, T., Cole, K., Schmidt, L. Ph. H., Czasch, A., Akoury, D., Jagutzki, O., Williams, J. B., Osipov, T., Lee, S., Prior, M. H., Belkacem, A., Landers, A. L., Schmidt-Böcking, H., Weber, Th., Cherepkov, N. A., & Dörner, R. Auger decay of 1σg and 1σu hole states of the N2 molecule: Disentangling decay routes from coincidence measurements. United States. doi:10.1103/PhysRevA.81.043426.
Semenov, S. K., Schöffler, M. S., Titze, J., Petridis, N., Jahnke, T., Cole, K., Schmidt, L. Ph. H., Czasch, A., Akoury, D., Jagutzki, O., Williams, J. B., Osipov, T., Lee, S., Prior, M. H., Belkacem, A., Landers, A. L., Schmidt-Böcking, H., Weber, Th., Cherepkov, N. A., and Dörner, R. Thu . "Auger decay of 1σg and 1σu hole states of the N2 molecule: Disentangling decay routes from coincidence measurements". United States. doi:10.1103/PhysRevA.81.043426. https://www.osti.gov/servlets/purl/1511319.
@article{osti_1511319,
title = {Auger decay of 1σg and 1σu hole states of the N2 molecule: Disentangling decay routes from coincidence measurements},
author = {Semenov, S. K. and Schöffler, M. S. and Titze, J. and Petridis, N. and Jahnke, T. and Cole, K. and Schmidt, L. Ph. H. and Czasch, A. and Akoury, D. and Jagutzki, O. and Williams, J. B. and Osipov, T. and Lee, S. and Prior, M. H. and Belkacem, A. and Landers, A. L. and Schmidt-Böcking, H. and Weber, Th. and Cherepkov, N. A. and Dörner, R.},
abstractNote = {Results of the most sophisticated measurements in coincidence with the angular-resolved K-shell photoelectrons and Auger electrons and with two atomic ions produced by dissociation of N2 molecule are analyzed. Detection of photoelectrons at certain angles makes it possible to separate the Auger decay processes of the 1σg and 1σu core-hole states. The Auger electron angular distributions for each of these hole states are measured as a function of the kinetic-energy release of two atomic ions and are compared with the corresponding theoretical angular distributions. From that comparison one can disentangle the contributions of different repulsive doubly charged molecular ion states to the Auger decay. Different kinetic-energy-release values are directly related to the different internuclear distances. In this way one can trace experimentally the behavior of the potential energy curves of dicationic final states inside the Frank-Condon region. Presentation of the Auger-electron angular distributions as a function of kinetic-energy release of two atomic ions opens a new dimension in the study of Auger decay.},
doi = {10.1103/PhysRevA.81.043426},
journal = {Physical Review. A},
number = 4,
volume = 81,
place = {United States},
year = {2010},
month = {4}
}

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Figures / Tables:

FIG. 1 FIG. 1: Molecular frame photoelectron angular distributions in the plane perpendicular to the photon beam calculated for several light polarizations and photon energies: (a) for left handed circularly polarized light at photon energy 419 eV; (b) for light linearly polarized parallel to the molecular axis at 419 eV; (c) formore » light linearly polarized perpendicular to the molecular axis at 419 eV; (d) for left circular polarization at photon energy 483 eV. Molecular axis is directed along the horizontal axis as is shown in (c). The contributions of 1$σ_g$ and 1$σ_u$ hole states are shown by dashed and dot-dashed lines, respectively. Their sum is shown by solid line.« less

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    Works referencing / citing this record:

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