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91 results on '"Gharaibeh, M F"'

1. Photoionisation of Be-like and Li-like atomic oxygen{\it K}-shell photoionisation of O$^{4+}$ and O$^{5+}$ ions : experiment and theory

Author

McLaughlin, B. M., Bizau, J. -M., Cubaynes, D., Guilbaud, S., Douix, S., Shorman, M. M. Al, Ghazaly, M. O. A. El, Sakho, I., and Gharaibeh, M. F.

Subjects
Physics - Atomic Physics
Abstract

Absolute cross sections for the {\it K}-shell photoionisation of Be-like (O$^{4+}$) and Li-like (O$^{5+}$) atomic oxygen ions were measured for the first time (in their respective {\it K}-shell regions) by employing the ion-photon merged-beam technique at the SOLEIL synchrotron-radiation facility in Saint-Aubin, France. High-resolution spectroscopy with E/$\Delta$E $\approx$ 3200 ($\approx$ 170 meV, FWHM)was achieved with photon energy from 550 eV up to 670 eV. Rich resonance structure observed in the experimental spectra is analysed using the R-matrix with pseudo-states (RMPS) method. Results are also compared with the screening constant by unit nuclear charge (SCUNC) calculations. We characterise and identify the strong $\rm 1s \rightarrow 2p$ resonances for both ions and the weaker $\rm 1s \rightarrow np$ resonances ($ n \ge 3$) observed in the {\it K}-shell spectra of O$^{4+}$., Comment: 6 figures, 7 Tables, accepted for publication in MNRAS

Published
2016

2. K-shell photoionization of Be-like Boron (B$^+$) Ions: Experiment and Theory

Author

Mueller, A, Schippers, S, Phaneuf, R A, Scully, S W J, Aguilar, A, Cisneros, C, Gharaibeh, M F, Schlachter, A S, and McLaughlin, B M

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Physics - Atomic Physics
Abstract

Absolute cross sections for the K-shell photoionization of Be-like boron ions were measured with the ion-photon merged-beams technique at the Advanced Light Source synchrotron radiation facility. High-resolution spectroscopy with E/$\Delta$E up to 8800 ($\Delta$E $\sim$ 22 meV) covered the energy ranges 193.7 -- 194.7 eV and 209 -- 215 eV. Lifetimes of the strongest resonances are determined with relative uncertainties down to approximately 4% for the broadest resonance. The measured resonance strengths are consistent with 60 % $\rm 1s^22s^2$ $^1S$ ground-state and 40 % $\rm 1s^22s2p$ $^3P^o$ metastable-state ions in the primary ion beam and confirmed by comparison with independent absolute photo-recombination heavy-ion storage-ring measurements with B$^{2+}$ ions using the principle of detailed balance. Experimental determination of the line width for the $\rm 1s2s^22p$ $^1$P$^{\rm o}$ resonance gives a value of 47 $\pm$ 2 meV and compares favourably to a theoretical estimate of 47 meV from the R-matrix with pseudo-states (RMPS) method. The measured line widths of the $\rm 1s2s2p^2$ $^3$P, $^3$D resonances are 10.0 $\pm$ 2 meV and 32 $\pm$ 3meV, respectively, compared to RMPS theoretical estimates of 9 meV and 34 meV., Comment: 23 pages, 6 figures, 2 tables, accepted for publication in J. Phys. B

Published
2014
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3. K-Shell Photoionization of B-like Oxygen (O$^{3+}$) Ions: Experiment and Theory

Author

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

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Physics - Atomic Physics
Abstract

Absolute cross sections for the {\it K}-shell photoionization of boron-like (B-like) O$^{3+}$ ions were measured by employing the ion-photon merged-beam technique at the SOLEIL synchrotron-radiation facility in Saint-Aubin, France. High-resolution spectroscopy with E/$\Delta$E $\approx$ 5000 ($\approx$ 110 meV, FWHM) was achieved with photon energy from 540 eV up to 600 eV. Several theoretical approaches, including R-Matrix, Multi-Configuration Dirac-Fock and Screening Constant by Unit Nuclear Charge were used to identify and characterize the strong 1s $\rightarrow$ 2p and the weaker 1s $\rightarrow$ 3p resonances observed in the {\it K}-shell spectra of this ion. The trend of the integrated oscillator strength and autoionisation width (natural line width) of the strong $\rm 1s \rightarrow 2p$ resonances along the first few ions of the B-like sequence is discussed., Comment: 23 pages, 5 figures, 5 tables, accepted for publication in J. Phys. B. arXiv admin note: text overlap with arXiv:1402.0519

Published
2014
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4. {\it K}-Shell Photoionization of B-like Atomic Nitrogen Ions: Experiment and Theory

Author

Gharaibeh, M F, Hassan, N El, Shorman, M M Al, Bizau, J M, Cubaynes, D, Guilbaud, S, Sakho, I, Blancard, C, and McLaughlin, B M

Subjects
Physics - Atomic Physics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

Measurements of absolute cross sections for the {\it K}-shell photoionization of B-like atomic nitrogen ions were carried out utilizing the ion-photon merged-beam technique at the SOLEIL synchrotron radiation facility in Saint-Aubin, France. High-resolution spectroscopy with E/$\Delta$E $\approx$ 13,500 was the maximum resolution achieved. We have investigated two photon energy regions: 404 eV -- 409 eV and 439 eV -- 442 eV. Resonance peaks found in the experimental measured cross sections are compared with theoretical estimates from the multi-configuration Dirac - Fock, R-matrix and empirical methods, allowing identification of the strong 1s $\rightarrow$ 2p and the weaker 1s $\rightarrow$ 3p resonances in the observed {\it K}-shell spectra of this B-like nitrogen ion., Comment: 16 pages, 3 figures, 2 tables: Accepted for publication in J. Phys. B: At. Mol. & Opt. Phys. arXiv admin note: substantial text overlap with arXiv:1308.6795

Published
2014

5. {\it K}-Shell Photoionization of Be-like and Li-like Ions of Atomic Nitrogen: Experiment and Theory

Author

Shorman, M M Al, Gharaibeh, M F, Bizau, J M, Cubaynes, D, Guilbaud, S, Hassan, N El, Miron, C, Nicolas, C, Robert, E, Sakho, I, Blancard, C, and McLaughlin, B M

Subjects
Physics - Atomic Physics, Astrophysics - High Energy Astrophysical Phenomena, Physics - Atomic and Molecular Clusters
Abstract

Absolute cross sections for the {\it K}-shell photoionization of Be-like and Li-like atomic nitrogen ions were measured by employing the ion-photon merged-beam technique at the SOLEIL synchrotron radiation facility in Saint-Aubin, France. High-resolution spectroscopy at nominal resolutions of 38 meV, 56 meV, 111 meV, 133 meV FWHM for Be-like and 125 meV FWHM for Li-like atomic nitrogen ions was achieved for the photon energies ranging from 410 eV up to 460 eV. The experimental measurements are compared with theoretical estimates from the multi-configuration Dirac-Fock (MCDF), R-matrix and an empirical method. The interplay between experiment and theory enabled the identification and characterisation of the strong 1s $\rightarrow$ 2p resonances features observed in the {\it K}-shell spectra of each ion and the region around 460 eV for the 1s $\rightarrow$ 3p resonance of the N$^{3+}$ ion yielding suitable agreement with experiment., Comment: 22 pages, 5 figures, 3 Tables. J. Phys. B: At. Mol.Opt. Phys. (2013) in press

Published
2013

6. K-shell photoionization of ground-state Li-like carbon ions [C$^{3+}$]: experiment, theory and comparison with time-reversed photorecombination

Author

Müller, A, Schippers, S., Phaneuf, R. A., Scully., S. W. J., Aguilar, A., Covington, A. M., Álvarez, I., Cisneros, C, Emmons, E. D., Gharaibeh, M. F., Hinojosa, G., Schlachter, A S., and McLaughlin, B. M.

Subjects
Astrophysics - Earth and Planetary Astrophysics, Physics - Atomic Physics
Abstract

Absolute cross sections for the K-shell photoionization of ground-state Li-like carbon [C$^{3+}$(1s$^2$2s $^2$S)] ions were measured by employing the ion-photon merged-beams technique at the Advanced Light Source. The energy ranges 299.8--300.15 eV, 303.29--303.58 eV and 335.61--337.57 eV of the [1s(2s2p)$^3$P]$^2$P, [1s(2s2p)$^1$P]$^2$P and [(1s2s)$^3$S 3p]$^2$P resonances, respectively, were investigated using resolving powers of up to 6000. The autoionization linewidth of the [1s(2s2p)$^1$P]$^2$P resonance was measured to be $27 \pm 5$ meV and compares favourably with a theoretical result of 26 meV obtained from the intermediate coupling R-Matrix method. The present photoionization cross section results are compared with the outcome from photorecombination measurements by employing the principle of detailed balance., Comment: 3 figures and 2 tables

Published
2012
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7. K-shell photoionization of ground-state Li-like boron ions [B$^{2+}$]: Experiment and Theory

Author

Müller, A., Schippers, S., Phaneu, R. A., Scully, S. W. J., Aguilar, A., Cisneros, C., Gharaibeh, M. F., Schlachter, A. S., and McLaughlin, B. M.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

Absolute cross sections for the K-shell photoionization of ground-state Li-like boron [B$^{2+}$(1s$^2$2s $^2$S)] ions were measured by employing the ion-photon merged-beams technique at the Advanced Light Source synchrotron radiation facility. The energy ranges 197.5--200.5 eV, 201.9--202.1 eV of the [1s(2s\,2p)$^3$P]$^2$P${\rm ^o}$ and [1s(2s\,2p)$^1$P] $^2$P${\rm ^o}$ resonances, respectively, were investigated using resolving powers of up to 17\,600. The energy range of the experiments was extended to about 238.2 eV yielding energies of the most prominent [1s(2$\ell$\,n$\ell^{\prime}$)]$^2$P$^o$ resonances with an absolute accuracy of the order of 130 ppm. The natural linewidths of the [1s(2s\,2p)$^3$P] $^2$P${\rm ^o}$ and [1s(2s\,2p)$^1$P] $^2$P${\rm ^o}$ resonances were measured to be $4.8 \pm 0.6$ meV and $29.7 \pm 2.5$ meV, respectively, which compare favourably with theoretical results of 4.40 meV and 30.53 meV determined using an intermediate coupling R-matrix method., Comment: 6 figures and 2 tables

Published
2012
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8. K-Shell Photoionization of Singly Ionized Atomic Nitrogen: Experiment and Theory

Author

Gharaibeh, M. F., Bizau, J. M., Cubaynes, D., Guilbaud, S., Hassan, N. El, Shorman, M. M. Al, Miron, C., Nicolas, C., Robert, E., Blancard, C., and McLaughlin, B. M.

Subjects
Astrophysics - Earth and Planetary Astrophysics, Physics - Atomic Physics
Abstract

Absolute cross sections for the K-shell photoionization of C-like nitrogen ions were measured by employing the ion-photon merged-beam technique at the SOLEIL synchrotron radiation facility in Saint-Aubin, France. High-resolution spectroscopy with E/$\Delta$E $\approx$ 7,000 was achieved with the photon energy from 388 to 430 eV scanned with a band pass of 300 meV, and the 399.4 to 402 eV range with 60 meV. Experimental results are compared with theoretical predictions made from the multi-configuration Dirac-Fock (MCDF) and R-matrix methods. The interplay between experiment and theory enabled the identification and characterization of the strong 1s $\rightarrow$ 2p resonances observed in the spectra., Comment: 7 pages, 3 figures, 2 tables

Published
2012
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9. Electron-impact ionisation of $W^{q+}$ ions with 1 ⩽ q ⩽ 19

Author

Schury, Daniel, Becker, A., Schippers, S., Müller, A., Borovik, A., Ebinger, B., Gharaibeh, M. F., Hellhund, J., Huber, K., Rausch, J., Spruck, K., and Jin, F.

Subjects
ddc:530
Abstract

31st International Conference on Photonic, Electronic and Atomic Collisions, ICPEAC XXXI, Deauville, France, 23 Jul 2019 - 30 Jul 2019; Journal of physics / Conference series 1412, 152011 (2020). doi:10.1088/1742-6596/1412/15/152011, Published by IOP Publ., Bristol

Published
2020
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10. PHOTOIONIZATION AND FRAGMENTATION OF FULLERENE IONS

Author

MÜLLER, A., primary, SCHIPPERS, S., additional, PHANEUF, R. A., additional, SCULLY, S., additional, EMMONS, E. D., additional, GHARAIBEH, M. F., additional, HABIBI, M., additional, KILCOYNE, A. L. D., additional, AGUILAR, A., additional, SCHLACHTER, A. S., additional, DUNSCH, L., additional, YANG, S., additional, CHAKRABORTY, H. S., additional, MADJET, M. E., additional, and ROST, J. M., additional

Published
2008
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11. Electron-impact ionisation of Wq+ ions with 1 ⩽ q ⩽ 19

Author

Schury, D, primary, Becker, A, additional, Borovik, A, additional, Ebinger, B, additional, Gharaibeh, M F, additional, Hellhund, J, additional, Huber, K, additional, Rausch, J, additional, Spruck, K, additional, Jin, F, additional, Schippers, S, additional, and Müller, A, additional

Published
2020
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13. Electron-impact ionization ofW5+

Author

Jonauskas, V., primary, Kynienė, A., additional, Kučas, S., additional, Pakalka, S., additional, Masys, Š., additional, Prancikevičius, A., additional, Borovik, A., additional, Gharaibeh, M. F., additional, Schippers, S., additional, and Müller, A., additional

Published
2019
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14. K-shell photoionization of O+ and O2+ ions: Experiment and theory

Author

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

Subjects
K-shell, Plasma Physics, MCDF Theory, Atomic Physics, R-Matrix Theory, Photoionization, Oxtgen Ions
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. 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.

Published
2015

16. Electron-impact ionization of tungsten ions

Author

Borovik, A, primary, Schury, D, additional, Ebinger, B, additional, Spruck, K, additional, Becker, A, additional, Gharaibeh, M F, additional, Rausch, J, additional, Schippers, S, additional, and Müller, A, additional

Published
2015
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20. K-shell photoionization of O4+ and O5+ ions: experiment and theory.

Author

McLaughlin, B. M., Bizau, J.-M., Cubaynes, D., Guilbaud, S., Douix, S., Al Shorman, M. M., El Ghazaly, M. O. A., Sakho, I., and Gharaibeh, M. F.

Subjects
K-shell emission, PHOTOIONIZATION, OXYGEN, SYNCHROTRON radiation, HIGH resolution spectroscopy
Abstract

Absolute cross-sections for the K-shell photoionization of Be-like (O4 +) and Li-like (O5 +) atomic oxygen ions were measured for the first time (in their respective K-shell regions) by employing the ion--photon merged-beam technique at the SOLEIL synchrotron-radiation facility in Saint-Aubin, France. High-resolution spectroscopy with E/ΔE ≈ 3200 (≈170 meV, full width at half-maximum) was achieved with photon energy from 550 to 670 eV. Rich resonance structure observed in the experimental spectra is analysed using the R-matrix with pseudo-states (RMPS) method. Results are also compared with the screening constant by unit nuclear charge (SCUNC) calculations. We characterize and identify the strong 1s → 2p resonances for both ions and the weaker 1s → np resonances (n ≥ 3) observed in the K-shell spectra of O4 +. [ABSTRACT FROM AUTHOR]

Published
2017
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30. K-shell photoionization of Be-like B+ions

Author

Müller, A, primary, Schippers, S, additional, Phaneuf, R A, additional, Scully, S W J, additional, Aguilar, A, additional, Cisneros, C, additional, Gharaibeh, M F, additional, Schlachter, A S, additional, and McLaughlin, B M, additional

Published
2012
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34. Photoionization measurements for the iron isonuclear sequence Fe3+, Fe5+, and Fe7+

Author

Gharaibeh, M. F., primary, Aguilar, A., additional, Covington, A. M., additional, Emmons, E. D., additional, Scully, S. W. J., additional, Phaneuf, R. A., additional, Müller, A., additional, Bozek, J. D., additional, Kilcoyne, A. L. D., additional, Schlachter, A. S., additional, Àlvarez, I., additional, Cisneros, C., additional, and Hinojosa, G., additional

Published
2011
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37. K-shell photoionization of ground-state Li-like carbon ions [C3+]: experiment, theory and comparison with time-reversed photorecombination

Author

Müller, A, primary, Schippers, S, additional, Phaneuf, R A, additional, Scully, S W J, additional, Aguilar, A, additional, Covington, A M, additional, Álvarez, I, additional, Cisneros, C, additional, Emmons, E D, additional, Gharaibeh, M F, additional, Hinojosa, G, additional, Schlachter, A S, additional, and McLaughlin, B M, additional

Published
2009
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38. Scullyet al.Reply

Author

Scully, S. W. J., primary, Emmons, E. D., additional, Gharaibeh, M. F., additional, Phaneuf, R. A., additional, Kilcoyne, A. L. D., additional, Schlachter, A. S., additional, Schippers, S., additional, Müller, A., additional, Chakraborty, H. S., additional, Madjet, M. E., additional, and Rost, J. M., additional

Published
2007
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39. Doubly excited resonances in the photoionization spectrum of Li+

Author

Scully, S W J, primary, Álvarez, I, additional, Cisneros, C, additional, Emmons, E D, additional, Gharaibeh, M F, additional, Leitner, D, additional, Lubell, M S, additional, Müller, A, additional, Phaneuf, R A, additional, Püttner, R, additional, Schlachter, A S, additional, Schippers, S, additional, Shi, W, additional, Ballance, C P, additional, and McLaughlin, B M, additional

Published
2007
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40. Photoionization and electron-impact ionization ofKr3+

Author

Lu, M., primary, Alna’washi, G., additional, Habibi, M., additional, Gharaibeh, M. F., additional, Phaneuf, R. A., additional, Kilcoyne, A. L. D., additional, Levenson, E., additional, Schlachter, A. S., additional, Cisneros, C., additional, and Hinojosa, G., additional

Published
2006
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41. Doubly excited resonances in the photoionization spectrum of Li+: experiment and theory

Author

Scully, S W J, primary, Álvarez, I, additional, Cisneros, C, additional, Emmons, E D, additional, Gharaibeh, M F, additional, Leitner, D, additional, Lubell, M S, additional, Müller, A, additional, Phaneuf, R A, additional, Püttner, R, additional, Schlachter, A S, additional, Schippers, S, additional, Shi, W, additional, Ballance, C P, additional, and McLaughlin, B M, additional

Published
2006
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43. Photoionization and electron-impact ionization ofXe3+

Author

Emmons, E. D., primary, Aguilar, A., additional, Gharaibeh, M. F., additional, Scully, S. W. J., additional, Phaneuf, R. A., additional, Kilcoyne, A. L. D., additional, Schlachter, A. S., additional, Álvarez, I., additional, Cisneros, C., additional, and Hinojosa, G., additional

Published
2005
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44. Photoexcitation of a Volume Plasmon inC60Ions

Author

Scully, S. W. J., primary, Emmons, E. D., additional, Gharaibeh, M. F., additional, Phaneuf, R. A., additional, Kilcoyne, A. L. D., additional, Schlachter, A. S., additional, Schippers, S., additional, Müller, A., additional, Chakraborty, H. S., additional, Madjet, M. E., additional, and Rost, J. M., additional

Published
2005
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45. Photoionization of ions of the nitrogen isoelectronic sequence: experiment and theory for F2+and Ne3+

Author

Aguilar, A, primary, Emmons, E D, additional, Gharaibeh, M F, additional, Covington, A M, additional, Bozek, J D, additional, Ackerman, G, additional, Canton, S, additional, Rude, B, additional, Schlachter, A S, additional, Hinojosa, G, additional, Álvarez, I, additional, Cisneros, C, additional, McLaughlin, B M, additional, and Phaneuf, R A, additional

Published
2005
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48. Photoionization ofSc2+ions by synchrotron radiation: Measurements and absolute cross sections in the photon energy range 23–68 eV

Author

Schippers, S., primary, Müller, A., additional, Ricz, S., additional, Bannister, M. E., additional, Dunn, G. H., additional, Schlachter, A. S., additional, Hinojosa, G., additional, Cisneros, C., additional, Aguilar, A., additional, Covington, A. M., additional, Gharaibeh, M. F., additional, and Phaneuf, R. A., additional

Published
2003
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49. Experimental Link of Photoionization ofSc2+to Photorecombination ofSc3+: An Application of Detailed Balance in a Unique Atomic System

Author

Schippers, S., primary, Müller, A., additional, Ricz, S., additional, Bannister, M. E., additional, Dunn, G. H., additional, Bozek, J., additional, Schlachter, A. S., additional, Hinojosa, G., additional, Cisneros, C., additional, Aguilar, A., additional, Covington, A. M., additional, Gharaibeh, M. F., additional, and Phaneuf, R. A., additional

Published
2002
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