Abstract
An analytical review of the theory of elementary atomic and molecular processes in the field of intense laser monochromatic radiation is presented. The discussion focuses on near-threshold processes involving Rydberg intermediate complexes, which play an important role in Earth’s upper atmosphere. The possibilities of the stationary method of radiative scattering matrix, based on the formalism of the renormalized Lippmann-Schwinger equations, are demonstrated. The approach is used to describe in a unified way a variety of near-threshold processes, the probability amplitudes of which are elements of the radiative scattering matrix for all possible reaction channels. They also include processes of restructuring of the particles (predissociation, associative ionization, exchange reactions, etc.), which in principle cannot be described using traditional nonstationary theories.
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