Resonant and Near-Threshold Photoionization Cross Sections of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>Fe</mml:mi><mml:mrow><mml:mn>14</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:math>

Simon, M. C.; López‐Urrutia, J. R. Crespo; Beilmann, C.; Schwarz, Maria A.; Harman, Z.; Epp, Sascha W.; Schmitt, B.; Baumann, T.; Behar, E.; Bernitt, Sven; Follath, R.; Ginzel, R.; Keitel, Christoph H.; Klawitter, R.; Kubiček, Katharina; Mäckel, V.; Mokler, P. H.; Reichardt, G.; Schwarzkopf, O.; Ullrich, J.

doi:10.1103/physrevlett.105.183001

Cited by 55 publications

(41 citation statements)

References 34 publications

(50 reference statements)

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“…Models not considering these higher-order effects in plasmas containing light-Z species can therefore not describe correctly the status in a plasma. Moreover, for the time-reversed processes of resonant photoionization [36], i. e., the resonant excitation to an autoionizing intermediate state, also those higher-order processes may be of equal importance. Even beyond TR, quadruelectronic recombination has been observed for different ionic species.…”

Section: Discussionmentioning

confidence: 99%

Major role of multielectronicK-Lintershell resonant recombination processes in Li- to O-like ions of Ar, Fe, and Kr

et al. 2013

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Dielectronic and higher-order resonant electron recombination processes including a K-shell excitation were systematically measured at high resolution in electron beam ion traps. Storing highly charged Ar, Fe, and Kr ions, the dependence on atomic number Z of the contribution of these processes to the total recombination cross section was studied and compared with theoretical calculations. Large higher-order resonant recombination contributions are found, especially for systems with 10 < Z < 36. In some cases, they even surpass the strength of the dielectronic channel, which was hitherto presumed to be always the dominant one. These findings have consequences for the modeling of high-temperatur plasmas. Features attributed to inter-shell quadruelectronic recombination were also observed. The experimental data obtained for the He-like to O-like isoelectronic sequences compare well with the results of advanced relativistic distorted-wave calculations employing multiconfiguration Dirac-Fock bound state wave functions that include threefold and fourfold excitations.

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Section: Discussionmentioning

confidence: 99%

Major role of multielectronicK-Lintershell resonant recombination processes in Li- to O-like ions of Ar, Fe, and Kr

et al. 2013

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“…Substantial amounts of PI data have been obtained by employing the dual-laserplasma technique [17]. Additional access to PI spectroscopy is provided by the application of ion-trapping techniques [18,19].…”

Section: Introductionmentioning

confidence: 99%

K-shell photoionization of Be-like boron (B⁺) ions: experiment and theory

Müller¹,

Schippers²,

Phaneuf³

et al. 2014

J. Phys. B: At. Mol. Opt. Phys.

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View the article online for updates and enhancements. AbstractAbsolute 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/ E up to 8800 ( E ∼ 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% 1s 2 2s 2 1 S ground-state and 40% 1s 2 2s2p 3 P 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 1s2s 2 2p 1 P o resonance gives a value of 47 ± 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 1s2s2p 2 3 P, 3 D resonances are 10.0 ± 2 meV and 32 ± 3 meV, respectively, compared to RMPS theoretical estimates of 9 meV and 34 meV.

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“…In this way even "perfect" spectral blends of lines of different charge states of the same element can be identified [38]. Such a blend affects, for example, the determination of the 3C / 3D line ratio in Fe XVII, one of the brightest line groups in astrophysical X-ray spectra.…”

Section: Active Interrogationmentioning

confidence: 99%

“…In the vacuum ultraviolet (VUV), extreme ultraviolet (EUV), or X-ray range, however, there now are tunable light sources that can fill this role. The Heidelberg device FLASH-EBIT has been transported to the synchrotron light sources PETRA (at DESY Hamburg) [37] and BESSY-II (Berlin) [38], and to the free-electron lasers FLASH (at DESY Hamburg) [39,40] and LCLS (at SLAC, Menlo Park, CA) [41]. The electron beam ion trap was used to provide a target of highly charged ions of a known element and predictable highest charge state, and the narrowband VUV/EUV/X-ray radiation was scanned across a spectral band, resulting in detectable fluorescence only when in resonance with atomic transitions (usually ground state transitions) in the target.…”

Section: Active Interrogationmentioning

confidence: 99%

Guest Editor’s Notes on the “Atoms” Special Issue on “Perspectives of Atomic Physics with Trapped Highly Charged Ions”

Trabert

2016

Atoms

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Abstract:The study of highly charged ions (HCI) was pursued first at Uppsala (Sweden), by Edlén and Tyrén in the 1930s. Their work led to the recognition that the solar corona is populated by such ions, an insight which forced massive paradigm changes in solar physics. Plasmas aiming at controlled fusion in the laboratory, laser-produced plasmas, foil-excited swift ion beams, and electron beam ion traps have all pushed the envelope in the production of HCI. However, while there are competitive aspects in the race for higher ion charge states, the real interest lies in the very many physics topics that can be studied in these ions. Out of this rich field, the Special Issue concentrates on atomic physics studies that investigate highly charged ions produced, maintained, and/or manipulated in ion traps. There have been excellent achievements in the field in the past, and including fairly recent work, they have been described by their authors at conferences and in the appropriate journals. The present article attempts an overview over current lines of development, some of which are expanded upon in this Special Issue.

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Resonant and Near-Threshold Photoionization Cross Sections ofFe14+

Cited by 55 publications

References 34 publications

Major role of multielectronicK-Lintershell resonant recombination processes in Li- to O-like ions of Ar, Fe, and Kr

Major role of multielectronicK-Lintershell resonant recombination processes in Li- to O-like ions of Ar, Fe, and Kr

K-shell photoionization of Be-like boron (B⁺) ions: experiment and theory

Guest Editor’s Notes on the “Atoms” Special Issue on “Perspectives of Atomic Physics with Trapped Highly Charged Ions”

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Resonant and Near-Threshold Photoionization Cross Sections ofFe14+

Cited by 55 publications

References 34 publications

Major role of multielectronicK-Lintershell resonant recombination processes in Li- to O-like ions of Ar, Fe, and Kr

Major role of multielectronicK-Lintershell resonant recombination processes in Li- to O-like ions of Ar, Fe, and Kr

K-shell photoionization of Be-like boron (B+) ions: experiment and theory

Guest Editor’s Notes on the “Atoms” Special Issue on “Perspectives of Atomic Physics with Trapped Highly Charged Ions”

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Product

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K-shell photoionization of Be-like boron (B⁺) ions: experiment and theory