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

Journal Article · · Physical Review A - Atomic, Molecular, and Optical Physics
 [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)
+ Show Author Affiliations

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.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Organization:
USDOE; Scientific Research Support Fund; SESAME–Lounsbery Foundation; National Science Foundation (NSF)
Grant/Contract Number:
AC05-00OR22725; Bas/2/02/2010
OSTI ID:
1565360
Alternate ID(s):
OSTI ID: 1208203
Journal Information:
Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 92, Issue 2; ISSN 1050-2947
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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Cited By (4)

K-shell photoabsorption and photoionization of trace elements: II. Isoelectronic sequences with electron number 12 ≤ N ≤ 18 journal August 2017
Photoionisation of ions with synchrotron radiation: from ions in space to atoms in cages journal November 2015
K-shell photoabsorption and photoionization of trace elements: III. Isoelectronic sequences with electron number 19 ≤ N ≤ 26 journal August 2018
K-shell photoabsorption and photoionization of trace elements. III. Isoelectronic sequences with electron number $19\leq N\leq 26$ text January 2018

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