K-shell photoionization of ${\mathrm{O}}^{+}$ and ${\mathrm{O}}^{2+}$ ions: Experiment and theory

K-shell photoionization of $O^{+}$ and $O^{2 +}$ ions: Experiment and theory

J. M. Bizau, D. Cubaynes, S. Guilbaud, M. M. Al Shorman, M. F. Gharaibeh, I. Q. Ababneh, C. Blancard, and B. M. McLaughlin

Phys. Rev. A 92, 023401 – Published 3 August 2015

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 $E / Δ E \approx 5300$ 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 $1 s \to 2 p$ and the weaker $1 s \to n p (n > 2)$ resonances observed. A detailed comparison of the energies of the $1 s \to 2 p$ 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.

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Received 9 April 2015

DOI:https://doi.org/10.1103/PhysRevA.92.023401

Authors & Affiliations

J. M. Bizau^*

Institut des Sciences Moléculaires d’Orsay (ISMO), CNRS UMR 8214, Université Paris-Sud, Bâtiment 350, F-91405 Orsay cedex, France and Synchrotron SOLEIL - L'Orme des Merisiers, Saint-Aubin - BP 48 91192 Gif-sur-Yvette cedex, France

D. Cubaynes

Institut des Sciences Moléculaires d’Orsay (ISMO), CNRS UMR 8214, Université Paris-Sud, Bâtiment 350, F-91405 Orsay cedex, France and Synchrotron SOLEIL - L'Orme des Merisiers, Saint-Aubin - BP 48 91192 Gif-sur-Yvette cedex, France

S. Guilbaud

Institut des Sciences Moléculaires d’Orsay (ISMO), CNRS UMR 8214, Université Paris-Sud, Bâtiment 350, F-91405 Orsay cedex, France

M. M. Al Shorman

Institut des Sciences Moléculaires d’Orsay (ISMO), CNRS UMR 8214, Université Paris-Sud, Bâtiment 350, F-91405 Orsay cedex, France

M. F. Gharaibeh^†

Department of Mathematics, Statistics and Physics, P.O. Box 2713, Qatar University, Doha, Qatar

I. Q. Ababneh

Department of Physics, Jordan University of Science and Technology, Irbid 22110, Jordan

C. Blancard

CEA-DAM-DIF, Bruyères-le-Châtel, F-91297 Arpajon Cedex, France

B. M. McLaughlin^‡

Centre for Theoretical Atomic, Molecular and Optical Physics (CTAMOP), School of Mathematics and Physics, The David Bates Building, 7 College Park, Queen's University Belfast, Belfast BT7 1NN, United Kingdom and Institute for Theoretical Atomic and Molecular Physics (ITAMP), Harvard Smithsonian Center for Astrophysics, MS-14, Cambridge, Massachusetts 02138, USA

^*Corresponding author: jean-marc.bizau@u-psud.fr
^†Previous address: Department of Physics, Jordan University of Science and Technology, Irbid 22110, Jordan.
^‡Corresponding author: b.mclaughlin@qub.ac.uk

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Vol. 92, Iss. 2 — August 2015

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Physical Review A

covering atomic, molecular, and optical physics and quantum information

K-shell photoionization of $O^{+}$ and $O^{2 +}$ ions: Experiment and theory

J. M. Bizau, D. Cubaynes, S. Guilbaud, M. M. Al Shorman, M. F. Gharaibeh, I. Q. Ababneh, C. Blancard, and B. M. McLaughlin

Phys. Rev. A 92, 023401 – Published 3 August 2015

Abstract

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Physical Review A

covering atomic, molecular, and optical physics and quantum information

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

J. M. Bizau, D. Cubaynes, S. Guilbaud, M. M. Al Shorman, M. F. Gharaibeh, I. Q. Ababneh, C. Blancard, and B. M. McLaughlin

Phys. Rev. A 92, 023401 – Published 3 August 2015

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K-shell photoionization of $O^{+}$ and $O^{2 +}$ ions: Experiment and theory