Quasicrossings of potential curves in the two-Coulomb-center problem

The quasiclassical expression for the exchange interaction ΔE of potential curves at the points of their quasicrossing is found by means of the combined approach for solving the quantum mechanical two-Coulomb-center Z₁eZ₂ problem. It can be used further for the calculation of cross sections of charge exchange processes between hydrogen or hydrogen-like atoms and bare nuclei. Graphical abstract: [Figure not available: see fulltext.].