19 citations · 82 across the 8 of their papers we have counts for
8 papers
pCI: a parallel configuration interaction software package for high-precision atomic structure calculations
Charles Cheung, Mikhail G. Kozlov, Sergey G. Porsev +3
We introduce the pCI software package for high-precision atomic structure calculations. The standard method of calculation is based on the configuration interaction (CI) method to…
Natural-linewidth measurements of the 3C and 3D soft-x-ray transitions in Ni XIX
Chintan Shah, Steffen Kühn, Sonja Bernitt +15
We used the monochromatic soft-x-ray beamline P04 at the synchrotron-radiation facility PETRA III to resonantly excite the strongest transitions in neon-like Ni XIX ions, $…
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…
Calculation of francium hyperfine anomaly
E. A. Konovalova, Yu. A. Demidov, M. G. Kozlov +1
The Dirac-Hartree-Fock plus many-body perturbation theory (DHF+MBPT) method has been used to calculate hyperfine structure constants for Fr. Calculated hyperfine structure anomaly…
Correlation, Breit, and QED effects in spectra of Mg-like ions
E. A. Konovalova, M. G. Kozlov
We calculated spectra of the first six members of the Mg-like isoelectronic sequence using different approximations. The most accurate results were obtained with the configuration…
Observation of an unexpected negative isotope shift in 229Th+ and its theoretical explanation
M. V. Okhapkin, D. M. Meier, E. Peik +3
We have measured the hyperfine structure and isotope shifts of the 402.0 nm and 399.6 nm resonance lines in 229Th+. These transitions could provide pathways towards the 229Th isome…
Sensitivity coefficients to -variation for astrophysically relevant transitions in Ni II
E. A. Konovalova, M. G. Kozlov, R. T. Imanbaeva
We calculated the dependence of the transition frequencies on the fine-structure constant (-factors) for Ni~II. Nickel is one of the few elements with high sensitivity to $α…
Study of quadrupole polarizabilities with combined configuration interaction and coupled-cluster method
S. G. Porsev, M. S. Safronova, M. G. Kozlov
The recently developed method combining the configuration interaction and the coupled-cluster method was demonstrated to provide accurate treatment of correlation corrections in di…