hydrogen-like atom

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.

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.