36 citations · 163 across the 13 of their papers we have counts for
13 papers
Double to tenfold M-shell photoionization of singly charged lanthanum ions
M. Looshorn, B. M. Döhring, P. -M. Hillenbrand +9
Using the photon-ion merged-beams technique at the PETRA\,III synchrotron light source, we have measured cross sections for double and up to tenfold photoionization of La ion…
Comparison between Jacobi-Anger and saddle point methods to treat Above-threshold ionization
Danish Furekh Dar, Stephan Fritzsche
We present a detailed comparison of theoretical approaches for modeling strong-field ionization by few-cycle laser pulses. The dipole approximation is shown to accurately capture i…
High-dimensional maximally entangled photon pairs in parametric down-conversion
Richard Bernecker, Baghdasar Baghdasaryan, Stephan Fritzsche
Photon pairs generated from spontaneous parametric down-conversion are a well-established method to realize entangled bipartite photonic systems. Laguerre-Gaussian modes, which car…
Laser Resonance Chromatography of Th in He: an ab initio investigation
Giorgio Visentin, Anastasia Borschevsky, Larry A. Viehland +2
We propose a laser resonance chromatography (LRC) experiment on Th, with the goal of detecting the ion's electronic ground F state and metastable $7…
Transport property predictions for laser resonance chromatography on Rf (Z = 104)
Giorgio Visentin, Harry Ramanantoanina, Anastasia Borschevsky +5
We propose a theoretically designed laser resonance chromatography (LRC) experiment on Rf (Z = 104) drifting in He buffer gas. To this end, we first developed a four-level rate…
Insight into the prospective evaluation of third-order interelectronic corrections on Li-like ions
R. N. Soguel, S. Fritzsche
Relying on the redefined vacuum state approach, and based on one-particle three-loop Feynman diagrams, partial third-order interelectronic corrections to the valence electron energ…
Comparison of theory and experiment for radiative characteristics in neutral thulium
Andrey I. Bondarev, Maris Tamanis, Ruvin Ferber +4
Intensities in Tm I emission series originating from a common upper level are measured using a Fourier transform spectrometer. The derived relative transition probabilities within…
Surprising charge-radius kink in the Sc isotopes at N=20
Kristian König, Stephan Fritzsche, Gaute Hagen +11
Charge radii of neutron deficient 40Sc and 41Sc nuclei were determined using collinear laser spectroscopy. With the new data, the chain of Sc charge radii extends below the neutron…
Proton-neutron pairing correlations in the self-conjugate nucleus Sc
Agota Koszorus, Liam Vormawah, Randolf Beerwerth +16
Collinear laser spectroscopy of the self-conjugate nucleus Sc has been performed at the JYFL IGISOL IV facility in order to determine the change in nuclear mean-squ…
Multiple photodetachment of carbon anions via single and double core-hole creation
A. Perry-Sassmannshausen, T. Buhr, A. Borovik +8
We report on new measurements of m-fold photodetachment (m=2-5) of carbon anions via K-shell excitation and ionization. The experiments were carried out employing the photon-ion me…
Prominent role of multi-electron processes in K-shell double and triple photodetachment of oxygen anions
S. Schippers, R. Beerwerth, L. Abrok +7
The photon-ion merged-beams technique was used at a synchrotron light source for measuring absolute cross sections of double and triple photodetachment of O ions. The experim…
Stepwise contraction of the nf Rydberg shells in the 3d photoionization of multiply-charged xenon ions
S. Schippers, A. Borovik, T. Buhr +8
Triple photoionization of Xe3+, Xe4+ and Xe5+ ions has been studied in the energy range 670-750 eV, including the 3d ionization threshold. The photon-ion merged-beam technique was…
Radiative Capture of Twisted Electrons by Bare Ions
Oliver Matula, Armen G. Hayrapetyan, Valeriy G. Serbo +2
Recent advances in the production of twisted electron beams with a subnanometer spot size offer unique opportunities to explore the role of orbital angular momentum (OAM) in basic…