Coulomb interaction

The Investigation of the Fine Shift to the Energy Levels in the Hydrogen–Like Atoms with Accuracy α^6 ln α^(-1) by Quasipotential Method

Authors: Baykova N. A., Boikova O. A., Tyuhtyaev Y. N.

In the quasipotential approach the quantity of Logarifmic corrections to the fine shift increased but the sum result of α^6 ln α^(-1) is equal zero. The past of high order to a corrections is calculated.

Pair Production in a Strong Electric Field with an Account of the Coulomb Interaction

Authors: Levtchenko B. B.

In the framework of the Dirac model of vacuum the creation of е+е− pairs in a constant and uniform electric field with allowance Coulomb interaction between е+ and е− is considered. The transmission coefficient via the energy gap deformed by external field and the electric fields of particles is calculated in the semiclassical approximation. The Sauter exponential factor is modified by the exactly calculated function G(y) accounting Coulomb interaction of particles and changes in the shape of the potential barrier.

Тhе Quasipotential Approach to the Syperfine Splitting of Muonic Hydrogen and Positronium

Authors: Boykov A. A., Baykova N. A.

For the description of the two-partial atoms spectrum in quasipotential approach the relativistic amplitude is used. The interrelation of scattering amplitude expressions, corresponding to quantovoelektrodinamic corrections in various orders is traced. Arising from the accounting of delay effect the additional logarithmic corrections of the sixth order to the constant of fine structure in the bound level superfine shift are analyzed.