Asymptotic behaviour of atomic wave functions

Asymptotic behaviour of the wave function of a multielectron atom, in which one of electrons is in a far subbarrier region and the others are in the main region of motion, is investigated by the Lippmann-Schwinger equation. The proposed integral approach provides for correct radiation and angular dependences of asymptotic and gives possibility to find the asymptotic coefficients in their expansions in the ion states and spheric harmonics of an isolated electron with accuracy corresponding to quantum-mechanic calculation accuracy