321 citations · 3.1k across the 86 of their papers we have counts for
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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…
Excitation of the Th nucleus by the hole in the inner electronic shells
M. G. Kozlov, A. V. Oleynichenko, D. Budker +6
The Th nucleus has a long-lived isomeric state at 8.338(24) eV [Kraemer et al, Nature, \textbf{617}, 706 (2023)]. This state is connected to the ground state by an M1…
Calculations of the binding-energy differences for highly-charged Ho and Dy ions
I. M. Savelyev, M. Y. Kaygorodov, Y. S. Kozhedub +2
The binding-energy differences for and ions with ionization degrees , , and are calculated. The calculations are…
Relativistic calculations of the energies of the low-lying , , states and the probabilities of the one-photon transitions in heliumlike uranium
N. K. Dulaev, M. Y. Kaygorodov, A. V. Malyshev +2
For heliumlike uranium, the energies of the singly-excited , , and states with and the probabilities of the one-photon , ,…
Ground state of superheavy elements with : systematic study of the electron-correlation, Breit, and QED effects
I. M. Savelyev, M. Y. Kaygorodov, Y. S. Kozhedub +3
For superheavy elements with atomic numbers , the concept of the ground-state configuration is being reexamined. To this end, relativistic calculations of the e…
Model-QED operator for superheavy elements
A. V. Malyshev, D. A. Glazov, V. M. Shabaev +3
The model-QED-operator approach [Phys. Rev. A 88, 012513 (2013)] to calculations of the radiative corrections to binding and transition energies in atomic systems is extended to th…
Ionization potentials and electron affinities of Rg, Cn, Nh, and Fl superheavy elements
M. Y. Kaygorodov, D. P. Usov, E. Eliav +8
The successive ionization potentials (IPs) and electron affinities (EAs) for superheavy elements with , namely, Rg, Cn, Nh, and Fl are reexamined using the rel…
Combination of the Perturbation Theory with Configuration Interaction Method
M. G. Kozlov, I. I. Tupitsyn, A. I. Bondarev +1
Present atomic theory provides accurate and reliable results for atoms with a small number of valence electrons. However, most current methods of calculations fail when the number…
Single and double -shell vacancy production in slow Xe-Xe collisions
P. -M. Hillenbrand, S. Hagmann, Y. S. Kozhedub +23
We present an experimental and theoretical study of symmetric collisions at 50, 30, and 15 MeV/u, corresponding to strong perturbations with $v_K/v_…
Laser Spectroscopy of the yP states of Cr I
E. B. Norrgard, D. S. Barker, S. P. Eckel +5
Here we report measured and calculated values of decay rates of the 3d(D)4s4p(P)\ yP states of Cr I. The decay rates are measured usin…
Multiple-ionization energy difference of 163Ho and 163Dy atoms
I. M. Savelyev, M. Y. Kaygorodov, Y. S. Kozhedub +2
The multiple-ionization energy difference of 163Ho and 163Dy atoms is evaluated for the ionization degree q = 30, 48, 56. The calculations are performed by means of the large-scale…
Electron affinity of oganesson
M. Y. Kaygorodov, L. V. Skripnikov, I. I. Tupitsyn +7
The electron affinity (EA) of superheavy element Og is calculated by the use of the relativistic Fock-space coupled cluster (FSCC) and configuration interaction methods. The FSCC c…
Relativistic calculations of the chemical properties of the superheavy element with and its homologues
I. I. Tupitsyn, A. V. Malyshev, D. A. Glazov +4
Relativistic calculations of the electronic structure of the superheavy element of the eighth period eka-francium () and its homologues, which form the group of alkali m…
electronic factors of the and hyperfine structure constants for the states in Sn I
Asimina Papoulia, Sacha Schiffmann, Jacek Bieroń +7
Large-scale calculations of the electric field gradient, which constitutes the electronic contribution to the electric quadrupole hyperfine constant , were…
QED corrections to the factor of Li- and B-like ions
H. Cakir, V. A. Yerokhin, N. S. Oreshkina +4
QED corrections to the factor of Li-like and B-like ions in a wide range of nuclear charges are presented. Many-electron contributions as well as radiative effects on the one-l…
Strong relativistic effect on (quasi)resonance electron-capture processes in non-symmetrical heavy ion-atom collisions
Y. S. Kozhedub, A. I. Bondarev, X. Cai +7
(Quasi)resonance electron-capture processes in non-symmetrical heavy ion-atom collisions are studied employing a semiclassical atomic Dirac-Fock-Stu…
QED corrections to the fine structure in fluorinelike ions: model Lamb shift operator approach
V. M. Shabaev, I. I. Tupitsyn, M. Y. Kaygorodov +3
In [Li , Phys. Rev. A , 020502(R) (2018)] it was claimed that the model-potential computations of the Lamb shift on the fine stru…
Accurate prediction of clock transitions in a highly charged ion with complex electronic structure
C. Cheung, M. S. Safronova, S. G. Porsev +3
We have developed a broadly-applicable approach that drastically increases the ability to accurately predict properties of complex atoms. We applied it to the case of Ir, w…
Relativistic calculation of the nuclear recoil effect on the factor of the state in highly charged B-like ions
A. V. Malyshev, D. A. Glazov, I. A. Aleksandrov +2
The nuclear recoil effect on the -state factor of B-like ions is calculated to first order in the electron-to-nucleus mass ratio in the range --. Th…
Interelectronic-interaction contribution to the nuclear recoil effect on the factor of boronlike ions
D. A. Glazov, A. V. Malyshev, V. M. Shabaev +1
The nuclear recoil effect on the ground-state factor of highly charged boronlike ions is considered within the relativistic framework. The interelectronic-interaction contribut…
Complex scaled relativistic configuration-interaction study of the resonances in helium-like ions: from Boron to Argon
V. A. Zaytsev, I. A. Maltsev, I. I. Tupitsyn +1
Energies and Auger widths of the resonances in He-like ions from boron to argon are evaluated by means of a complex scaled configuration-interaction approach within the framew…
QED calculation of electron-electron correlation effects in heliumlike ions
Y. S. Kozhedub, A. V. Malyshev, D. A. Glazov +2
Fully relativistic approach to evaluate the correlation effects in highly charged ions is presented. The interelectronic-interaction contributions of first and second orders in $1/…
Isotope shifts of the - transition energies in Be-like thorium and uranium
N. A. Zubova, I. S. Anisimova, M. Yu. Kaygorodov +7
Precise calculations of the isotope shifts in berylliumlike thorium and uranium ions are presented. The main contributions to the field and mass shifts are calculated within the fr…
Relativistic calculations of the ground and inner-L-shell excited energy levels of berylliumlike ions
M. Y. Kaygorodov, Y. S. Kozhedub, I. I. Tupitsyn +4
Large-scale relativistic configuration-interaction method combined with many-body perturbation theory is consistently applied to calculations of the energy levels of the ground and…