Journal ArticleDOI
Threshold truncation of a 'giant' dipole resonance in photoionization of Ti3+
Stefan Schippers,Alfred Müller,R. A. Phaneuf,T van Zoest,Ignacio Alvarez,Carmen Cisneros,Erik D. Emmons,M. F. Gharaibeh,M. F. Gharaibeh,G. Hinojosa,Alfred S. Schlachter,S W J Scully +11 more
Reads0
Chats0
TLDR
In this article, the authors investigated the photoionization of triply charged titanium ions using the merged photon-ion beam technique at a synchrotron light source at a range of 42.6-49.4 eV and showed that the 3p5(3d23F)2F dipole resonance has a width of 1.5 eV.Abstract:
Photoionization of triply charged titanium ions was investigated using the merged photon–ion beam technique at a synchrotron light source. The experimental photon energy range 42.6–49.4 eV encompasses the threshold for the photoionization of Ti3+(3p6 3d2 D3/2) ground-state ions at 43.267 eV. Prominent resonance features due to 3p → 3d and 3p → 4s excitations are observed with the strongest one being the 'giant' 3p5(3d23F)2F dipole resonance which has a width of 1.5 eV. Since it is located only 0.2 eV above the ionization threshold a cut-off of this resonance is observed in photoionization. By employing the principle of detailed balance the results are compared with an earlier experimental study of the time-reversed Ti4+ photorecombination. The comparison clarifies the giant resonance's role in photorecombination and yields state-selective photoionization and photorecombinaton cross sections on an absolute scale.read more
Citations
More filters
Journal ArticleDOI
Photoionization cross sections of atomic ions from merged-beam experiments
TL;DR: The recent development of experimental photoionization cross sections of atomic ions has been reviewed in this article, where it has been possible during the last ten years to perform a large number of absolute cross-section measurements using the merged-beam method, with implications for the modelling of astrophysical and laboratory plasmas for which fundamental data of this kind are required.
Journal ArticleDOI
Study of valence band structure of Fe doped anatase TiO2 thin films
TL;DR: In this article, the structural and electronic properties of Fe doped and undoped TiO2 thin films deposited by pulsed laser deposition on Si(111) substrate were studied. But the results of these studies were limited.
Journal ArticleDOI
Fusion-Related Ionization and Recombination Data for Tungsten Ions in Low to Moderately High Charge States
TL;DR: In this article, a project has been initiated in which electron-impact and photon-induced ionization as well as photorecombination of Wq+ ions are studied, and cross sections and rate coefficients were determined for charge states q ranging from q = 1 to q = 5 for photoionization, for q = 0 up to q ≥ 19 for electron-contact ionization and for q ≥ 18 to q ≤ 21 for electron ion recombination.
Journal ArticleDOI
K-shell photoionization of ground-state Li-like carbon ions [C$^{3+}$]: experiment, theory and comparison with time-reversed photorecombination
Alfred Müller,Stefan Schippers,R. A. Phaneuf,S W J Scully,Alex Aguilar,A. M. Covington,I. Alvarez,C. Cisneros,Erik D. Emmons,M. F. Gharaibeh,G. Hinojosa,Alfred S. Schlachter,Brendan M. McLaughlin +12 more
TL;DR: In this article, 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.
Journal ArticleDOI
K-shell photoionization of ground-state Li-like carbon ions [C3+]: experiment, theory and comparison with time-reversed photorecombination
Alfred Müller,Stefan Schippers,R. A. Phaneuf,S W J Scully,S W J Scully,A. Aguilar,A. Aguilar,Aaron Covington,Ignacio Alvarez,Carmen Cisneros,Erik D. Emmons,M. F. Gharaibeh,M. F. Gharaibeh,G. Hinojosa,Alfred S. Schlachter,Brendan M. McLaughlin,Brendan M. McLaughlin +16 more
TL;DR: In this article, absolute cross sections for the K-shell photoionization of ground-state Li-like carbon [C3+(1s22s 2S)] ions were measured by employing the ion?photon merged-beams technique at the Advanced Light Source.
References
More filters
Journal ArticleDOI
Effects of Configuration Interaction on Intensities and Phase Shifts
TL;DR: In this paper, a theoretical analysis of the shape of the 2s2p^{1}P resonance of He observed in the inelastic scattering of electrons is presented. But the analysis is restricted to the case of one discrete level with two or more continua and of a set of discrete levels with one continuum.
Journal ArticleDOI
Photoabsorption cross sections for positive atomic ions with Z equal to or less than 30
Journal ArticleDOI
Photoionization of Ne+ using synchrotron radiation
Aaron Covington,A. Aguilar,I. R. Covington,M. F. Gharaibeh,G. Hinojosa,C. A. Shirley,R. A. Phaneuf,Ignacio Alvarez,C. Cisneros,I. Dominguez-Lopez,M. M. Sant'Anna,Alfred S. Schlachter,Brendan M. McLaughlin,Alexander Dalgarno +13 more
TL;DR: In this article, the authors used synchrotron radiation from an undulator beamline of the Advanced Light Source with a newly developed ion-photon-beam endstation.
Journal ArticleDOI
Photoionization of atomic ions
TL;DR: The development of both theoretical and experimental work on the photoionization of atomic ions over the last 20 years forms the subject of this review as mentioned in this paper, with implications for the modelling of stellar atmospheres, and for astrophysical and laboratory plasmas for which fundamental data of this kind are required.
Journal ArticleDOI
Observation of New Rydberg Series and Resonances in Doubly Excited Helium at Ultrahigh Resolution
TL;DR: A striking improvement in spectral resolution in the soft x-ray range to 1.0 meV at 64.1 eV is reported, measured via the $\ensuremath{\mu}\mathrm{eV}$-wide 2, ${\ensure math{-}1}_{3}$ double-excitation resonance of helium.