I. I. Tupitsyn

Dual kinetic balance approach to basis-set expansions for the dirac equation.

A new approach to finite basis sets for the Dirac equation is developed. It does not involve spurious states and improves the convergence properties of basis-set calculations. Efficiency of the method is demonstrated for finite basis sets constructed from B splines by calculating the one-loop self-energy correction for a hydrogenlike ion.

High-Accuracy Calculation of 6s ! 7s Parity-Nonconserving Amplitude in Cs

We calculated the parity-nonconserving (PNC) 6s-->7s amplitude in Cs. In the Dirac-Coulomb approximation our result is in good agreement with other calculations. Breit corrections to the PNC amplitude and to the Stark-induced amplitude beta are found to be -0.4% and -1%, respectively. The weak charge of 133Cs is Q(W) = -72.5+/-0.7 in agreement with the standard model.

Magnetic-dipole transition probabilities in B-like and Be-like ions

The magnetic-dipole transition probabilities between the fine-structure levels (1s{sup 2}2s{sup 2}2p) {sup 2}P{sub 1/2}-{sup 2}P{sub 3/2} for B-like ions and (1s{sup 2}2s2p) {sup 3}P{sub 1}-{sup 3}P{sub 2} for Be-like ions are calculated. The configuration-interaction method in the Dirac-Fock-Sturm basis is employed for the evaluation of the interelectronic-interaction correction with negative-continuum spectrum being taken into account. The 1/Z interelectronic-interaction contribution is derived within a rigorous QED approach employing the two-time Green function method. The one-electron QED correction is evaluated within framework of the anomalous magnetic-moment approximation. A comparison with the theoretical results of other authors and with available experimental data is presented.

Relativistic and QED corrections to the g factor of Li-like ions

Calculations of various corrections to the

Nuclear deformation effect on the binding energies in heavy ions

g

Transition frequency shifts with fine-structure-constant variation for Fe II: Breit and core-valence correlation corrections

factor of Li-like ions are presented, which result in a significant improvement of the theoretical accuracy in the region

Model operator approach to the Lamb shift calculations in relativistic many-electron atoms

Z=6--92

Transition energy and lifetime for the ground-state hyperfine splitting of high-Z lithiumlike ions

. The configuration-interaction Dirac-Fock method is employed for the evaluation of the interelectronic-interaction correction of order

QED Calculation of the2p3/2−2p1/2Transition Energy in Boronlike Argon

1∕{Z}^{2}

Probing the nuclide 180W for neutrinoless double-electron capture exploration

and higher. This correction is combined with the