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Title: K -shell photoionization of O + and O 2 + ions: Experiment and theory

Abstract

Absolute cross sections for the single and double K-shell photoionization of carbonlike O 2+ 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. 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 1 s →2 p and the weaker 1 s →n p (n >2 ) resonances observed. A detailed comparison of the energies of the 1 s →2 p 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:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); UT-Battelle LLC/ORNL, Oak Ridge, TN (Unted States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1565360
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review. A
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:
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. doi: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. doi: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. Sat . "K -shell photoionization of O+ and O2+ ions: Experiment and theory". United States. doi:10.1103/physreva.92.023401.
@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. 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 1 s →2 p and the weaker 1 s →n p (n >2 ) resonances observed. A detailed comparison of the energies of the 1 s →2 p 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},
issn = {1050-2947},
number = 2,
volume = 92,
place = {United States},
year = {2015},
month = {8}
}

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