57 citations · 460 across the 21 of their papers we have counts for
21 papers
Near L-Edge Single and Multiple Photoionization of Doubly Charged Iron Ions
Stefan Schippers, Randolf Beerwerth, Sadia Bari +11
Using the photon-ion merged-beams technique at a synchrotron light source, we have measured relative cross sections for single and up to five-fold photoionization of Fe ions…
Photoionization of tungsten ions: experiment and theory for W
A Müller, S Schippers, J Hellhund +3
Experimental and theoretical cross sections are reported for single-photon single ionization of W ions. Absolute measurements were conducted employing the photon-ion merged-…
Near--K-edge double and triple detachment of the F- negative ion: observation of direct two-electron ejection by a single photon
A. Müller, A. Borovik, S. Bari +9
Double and triple detachment of the F-(1s2 2s2 2p6) negative ion by a single photon have been investigated in the photon energy range 660 to 1000 eV. The experimental data provide…
Photoionisation of Ca ions in the valence-energy region 20eV~--~56eV : experiment and theory
A Mueller, S Schippers, R A Phaneuf +8
Relative cross sections for the valence shell photoionisation (PI) of ground level and metastable Ca ions were measured with high energy resolution by usi…
Photoionization of tungsten ions: experiment and theory for W
A Müller, S Schippers, J Hellhund +3
Experimental and theoretical results are reported for single-photon single ionization of the tungsten ion W. Absolute cross sections have been measured employing the photon-…
Photoionization of ions with synchrotron radiation: From ions in space to atoms in cages
S. Schippers, A. L. D. Kilcoyne, R. A. Phaneuf +1
The photon-ion merged-beams technique for the photoionization of mass/charge selected ionized atoms, molecules and clusters by x-rays from synchrotron radiation sources is introduc…
Photoionization of tungsten ions: experiment and theory for W and W
B M McLaughlin, C P Ballance, S Schippers +4
Experimental and theoretical results are reported for single-photon single ionization of W and W tungsten ions. Experiments were performed at the photon-ion merged-be…
Single-photon single ionization of W ions: experiment and theory
A. Müller, S. Schippers, J. Hellhund +5
Experimental and theoretical results are reported for photoionization of Ta-like (W) tungsten ions. Absolute cross sections were measured in the energy range 16 to 245 eV emp…
Valence-shell photoionization of Ag-like Xe ions : experiment and theory
A Mueller, S Schippers, D Esteves-Macaluso +6
We report on experimental and theoretical results for the photoionization of Ag-like xenon ions, Xe, in the photon energy range 95 to 145~eV. The measurements were carried o…
Valence-shell single photoionization of Chlorine-like K ions: Experiment and Theory
G. A. Alna'Washi, M. Lu, M. Habibi +6
The absolute single photoionization cross-section was measured for Cl-like K over the photon energy range from 44.2 - 69.7 eV at a constant energy resolution of 0.045 eV. Th…
K-shell photoionization of Be-like Boron (B) Ions: Experiment and Theory
A Mueller, S Schippers, R A Phaneuf +6
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 radi…
Inelastic processes in K^(+)- He collisions in energy range 0.7 - 10 keV
R. A. Lomsadze, M. R. Gochitashvili, R. Ya. Kezerashvili +2
Absolute cross sections for charge exchange, ionization, stripping and excitation in K^(+) - He collisions were measured in the ion energy range 0.7 - 10 keV. The experimental data…
Valence-shell single photoionization of Kr ions: Experiment and Theory
G. Hinojosa, A. M. Covington, G. A. Alna'Washi +10
Photoionization of Kr ions was studied in the energy range from 23.3 eV to 39.0 eV at a photon energy resolution of 7.5 meV. Absolute measurements were performed by merging bea…
State-resolved valence shell photoionization of Be-like ions: experiment and theory
A Müller, S Schippers, R. A. Phaneuf +5
High-resolution photoionization experiments were carried out using beams of Be-like C, N, and O ions with roughly equal populations of the S ground-state a…
K-shell photoionization of ground-state Li-like carbon ions [C]: experiment, theory and comparison with time-reversed photorecombination
A Müller, S. Schippers, R. A. Phaneuf +10
Absolute cross sections for the K-shell photoionization of ground-state Li-like carbon [C(1s2s S)] ions were measured by employing the ion-photon merged-beams techni…
K-shell photoionization of ground-state Li-like boron ions [B]: Experiment and Theory
A. Müller, S. Schippers, R. A. Phaneu +6
Absolute cross sections for the K-shell photoionization of ground-state Li-like boron [B(1s2s S)] ions were measured by employing the ion-photon merged-beams techniq…
Valence-shell photoionization of chlorine-like Ar ions
A. M. Covington, A. Aguilar, I. R. Covington +9
Absolute cross-section measurements for valence-shell photoionization of Ar ions are reported for photon energies ranging from 27.4 eV to 60.0 eV. The data, taken by merging…
Experimental Photoionization Cross-Section Measurements in the Ground and Metastable State Threshold Region of Se+
N. C. Sterling, D. A. Esteves, R. C. Bilodeau +4
Absolute photoionization cross-section measurements are reported for Se+ in the photon energy range 18.0-31.0 eV, which spans the ionization thresholds of the 4S_{3/2} ground state…
New Atomic Data for Trans-Iron Elements and Their Application to Abundance Determinations in Planetary Nebulae
N. C. Sterling, M. C. Witthoeft, D. A. Esteves +6
[Abridged] Investigations of neutron(n)-capture element nucleosynthesis and chemical evolution have largely been based on stellar spectroscopy. However, the recent detection of the…
Improved Neutron-Capture Element Abundances in Planetary Nebulae
N. C. Sterling, H. L. Dinerstein, S. Hwang +11
Spectroscopy of planetary nebulae (PNe) provides the means to investigate s-process enrichments of neutron(n)-capture elements that cannot be detected in asymptotic giant branch (A…
Dielectronic recombination of lithium-like Ni25+ ions - high resolution rate coefficients and influence of external crossed E and B fields
Stefan Schippers, Timo Bartsch, Carsten Brandau +7
Absolute dielectronic recombination (DR) rates for lithium-like Ni() ions were measured at high-energy resolution at the Heidelberg heavy-ion storage ring TSR. We…