K-shell photoionization of O+ and O2+ ions: Experiment and theory
| Author | Bizau, J.M. |
| Author | Cubaynes, D. |
| Author | Guilbaud, S. |
| Author | Al-Shorman, M. M. |
| Author | Gharaibeh, M. F. |
| Author | Ababneh, I. Q. |
| Author | Blancard, C. |
| Author | McLaughlin, B. M. |
| Available date | 2015-12-22T11:09:26Z |
| Publication Date | 2015-08-03 |
| Publication Name | PHYSICAL REVIEW A |
| Citation | Bizau, J. M. et al, (2015), "K-shell photoionization of O+ and O2+ ions: Experiment and theory", Physical Review A, 92(2), 23401. |
| ISSN | 1050-2947 |
| ISSN | 1094-1622 (online) |
| Abstract | Absolute cross sections for the single and double K-shell photoionization of carbon like O2+ and nitrogen like 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/ Delta(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. |
| Sponsor | M.F.G.acknowledges funding from the Scientific Research Support Fund, Jordan, under Contract No. as/2/02/2010. I.Q.A. acknowledges financial support from the SESAME – Lounsbery Foundation for a training fellowship. B.M.M. acknowledges support from the U.S. National Science Foundation through a grant to ITAMP at the Harvard-Smithsonian Center for Astrophysics, the RTRA network Triangle de la Physique, and a visiting research fellowship (VRF) from Queen’s University Belfast. |
| Language | en |
| Publisher | American Physical Society |
| Subject | Atomic Physics Plasma Physics Photoionization Oxtgen Ions R-Matrix Theory MCDF Theory K-shell |
| Type | Article |
| Issue Number | 2 |
| Volume Number | 92 |
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