54 citations · 403 across the 16 of their papers we have counts for
16 papers
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…
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…
Near L-edge photoionization of triply charged iron ions
Randolf Beerwerth, Ticia Buhr, Alexander Perry-Saßmannshausen +12
Relative cross sections for -fold photoionization () of Fe by single photon absorption were measured employing the photon-ion merged-beams setup PIPE at the…
QED radiative corrections to the P-P fine-structure in fluorinelike ions
A. V. Volotka, M. Bilal, R. Beerwerth +3
Ab initio calculations of QED radiative corrections to the - fine-structure transition energy are performed for selected F-like ions. These calculations are…
High-precision calculations of the spin-allowed transition in C {\small III}
Moazzam Bilal, Andrey V Volotka, Randolf Beerwerth +3
Large-scale relativistic calculations are performed for the transition energy and line strength of the transition in Be-like…
The photon-ion merged-beams experiment PIPE at PETRAIII - The first five years
S. Schippers, T. Buhr, A. Borovik +13
The Photon-Ion Spectrometer at PETRA III - in short, PIPE - is a permanently installed user facility at the "Variable Polarization XUV Beamline" P04 of the synchrotron light source…
Line strengths of QED-sensitive forbidden transitions in B-, Al-, F- and Cl-like ions
Moazzam Bilal, Andrey V Volotka, Randolf Beerwerth +1
The magnetic dipole (M1) line strength between the fine-structure levels of the ground configurations in B-, F-, Al- and Cl-like ions are calculated for the four elements argon, ir…
Hyperfine interaction with the Th nucleus and its low lying isomeric state
Robert A. Müller, Anna V. Maiorova, Stephan Fritzsche +8
The thorium nucleus with mass number has attracted much interest because its extremely low lying first excited isomeric state at about eV opens the possibility for the d…
Near L-Edge Single and Multiple Photoionization of Singly Charged Iron Ions
Stefan Schippers, Michael Martins, Randolf Beerwerth +7
Absolute cross sections for m-fold photoionization (m=1,...,6) of Fe+ by a single photon were measured employing the photon-ion merged-beams setup PIPE at the PETRA III synchrotron…
Multiconfiguration calculations of electronic isotope shift factors in Zn I
Livio Filippin, Jacek Bieroń, Gediminas Gaigalas +2
The present work reports results from systematic multiconfiguration Dirac-Hartree-Fock calculations of electronic isotope shift factors for a set of transitions between low-lying s…
LCLS in - photon out: fluorescence measurement of neon using soft x-rays
Razib Obaid, Christian Buth, Georgi L. Dakovski +10
We measured the fluorescence photon yield of neon upon soft x-ray ionization (~1200 eV) from the x-ray free electron laser at Linac Coherent Light Source, and demonstrated the usag…
Neon in ultrashort and intense x rays from free electron lasers
Christian Buth, Randolf Beerwerth, Razib Obaid +3
We theoretically examine neon atoms in ultrashort and intense x rays from free electron lasers and compare our results with data from experiments conducted at the Linac Coherent Li…
Multiconfiguration calculations of electronic isotope shift factors in Al I
Livio Filippin, Randolf Beerwerth, Jörgen Ekman +3
The present work reports results from systematic multiconfiguration Dirac-Hartree-Fock calculations of electronic isotope shift factors for a set of transitions between low-lying s…
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…
Changes in nuclear structure along the Mn isotopic chain studied via charge radii
H. Heylen, C. Babcock, R. Beerwerth +34
The hyperfine spectra of Mn were measured in two experimental runs using collinear laser spectroscopy at ISOLDE, CERN. Laser spectroscopy was performed on the atomic $…
Krylov subspace methods for the Dirac equation
Randolf Beerwerth, Heiko Bauke
The Lanczos algorithm is evaluated for solving the time-independent as well as the time-dependent Dirac equation with arbitrary electromagnetic fields. We demonstrate that the Lanc…