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Title: K-shell photoionization of O+ and O2+ ions: Experiment and theory

Abstract

Absolute cross sections for the single and double K-shell photoionization of carbonlike O2+ and nitrogenlike O+ ions were measured in the 526-620-eV photon energy range by employing the ion-photon merged-beam technique at the SOLEIL synchrotron radiation facility. We report high-resolution spectroscopy up to E /Δ E ≈5300 was achieved. Rich resonance structures observed in the experimental spectra are analyzed and identified with the aid of R-matrix and multiconfiguration Dirac-Fock (MCDF) methods. For these two atomic oxygen ions of particular astrophysical interest we characterized the strong 1s →2p and the weaker 1s →np (n >2 ) resonances observed. A detailed comparison of the energies of the 1s →2p resonances in the first members of the oxygen isonuclear sequence measured by synchrotron based experiments and the Chandra and XMM-Newton x-ray satellites is presented.

Authors:
 [1];  [1];  [2];  [2];  [3];  [4];  [5];  [6]
  1. Univ. Paris-Sud, Orsay (France); Synchrotron SOLEIL, Gif-sur-Yvette (France)
  2. Univ. Paris-Sud, Orsay (France)
  3. Qatar University, Doha (Qatar)
  4. Jordan Univ. of Science and Technology, Irbid (Jordan)
  5. Alternative Energies and Atomic Energy Commission (CEA), Arpajon (France)
  6. Queen's Univ., Belfast, Northern Ireland (United Kingdom); Harvard Smithsonian Center for Astrophysics, Cambridge, MA (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Org.:
USDOE; Scientific Research Support Fund; SESAME–Lounsbery Foundation; National Science Foundation (NSF)
OSTI Identifier:
1565360
Alternate Identifier(s):
OSTI ID: 1208203
Grant/Contract Number:  
AC05-00OR22725; Bas/2/02/2010
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review A - Atomic, Molecular, and Optical Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 2; Journal ID: ISSN 1050-2947
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; Optics; Physics

Citation Formats

Bizau, J. M., Cubaynes, D., Guilbaud, S., Al Shorman, M. M., Gharaibeh, M. F., Ababneh, I. Q., Blancard, C., and McLaughlin, B. M.. K-shell photoionization of O+ and O2+ ions: Experiment and theory. United States: N. p., 2015. Web. https://doi.org/10.1103/physreva.92.023401.
Bizau, J. M., Cubaynes, D., Guilbaud, S., Al Shorman, M. M., Gharaibeh, M. F., Ababneh, I. Q., Blancard, C., & McLaughlin, B. M.. K-shell photoionization of O+ and O2+ ions: Experiment and theory. United States. https://doi.org/10.1103/physreva.92.023401
Bizau, J. M., Cubaynes, D., Guilbaud, S., Al Shorman, M. M., Gharaibeh, M. F., Ababneh, I. Q., Blancard, C., and McLaughlin, B. M.. Mon . "K-shell photoionization of O+ and O2+ ions: Experiment and theory". United States. https://doi.org/10.1103/physreva.92.023401. https://www.osti.gov/servlets/purl/1565360.
@article{osti_1565360,
title = {K-shell photoionization of O+ and O2+ ions: Experiment and theory},
author = {Bizau, J. M. and Cubaynes, D. and Guilbaud, S. and Al Shorman, M. M. and Gharaibeh, M. F. and Ababneh, I. Q. and Blancard, C. and McLaughlin, B. M.},
abstractNote = {Absolute cross sections for the single and double K-shell photoionization of carbonlike O2+ and nitrogenlike O+ ions were measured in the 526-620-eV photon energy range by employing the ion-photon merged-beam technique at the SOLEIL synchrotron radiation facility. We report high-resolution spectroscopy up to E /Δ E ≈5300 was achieved. Rich resonance structures observed in the experimental spectra are analyzed and identified with the aid of R-matrix and multiconfiguration Dirac-Fock (MCDF) methods. For these two atomic oxygen ions of particular astrophysical interest we characterized the strong 1s →2p and the weaker 1s →np (n >2 ) resonances observed. A detailed comparison of the energies of the 1s →2p resonances in the first members of the oxygen isonuclear sequence measured by synchrotron based experiments and the Chandra and XMM-Newton x-ray satellites is presented.},
doi = {10.1103/physreva.92.023401},
journal = {Physical Review A - Atomic, Molecular, and Optical Physics},
number = 2,
volume = 92,
place = {United States},
year = {2015},
month = {8}
}

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Cited by: 9 works
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