Quasiclassical Theory of Tunnel Ionization of an Atom by the Perpendicular Electric and Magnetic Fields

Abstract

The method of quasiclassical localized states is developed for the stationary Schrödinger equation with the potentials of the atomic field and perpendicular electric and magnetic fields. Using this method quasiclassical wave functions for an arbitrary atom are constructed in classically forbidden and allowed regions. The general analytical expression for leading term of the asymptotic (at small intensities of electrostatic E and magnetic H fields when H=(cE) << 1) behaviour of ionization rate of an atom in such electromagnetic field is found. Various limiting cases of the expression obtained are analysed.