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Ionized geocosmic media parameters in a thermal and a subthermal range ofenergy have a number of unique features. The photoresonance plasma that isformed by optical excitation of the lowest excited (resonance) atomic states isone example of conversion of radiation energy into electrical one. Sincespontaneous fluorescence of excited atoms is probabilistic, the description ofthe radiating quantized system evolution along with photons energy transfer ina cold atoms medium, should include elements of stochastic dynamics. Finally,the chaotic dynamics of a weakly bound Rydberg electron over a grid of theenergy levels diagram of a quasi-molecular Rydberg complex provides anexcitation migration of the electron forward to the ionization continuum. Thiswork aims at discussing the specific features of the dynamic resonancesformalism in the description of processes involving Rydberg states of anexcited atom, including features in the fluorescence spectrum partially causedby the quantum defect control due to the presence of statistic electromagneticfields.

Dynamics Resonances in Atomic States of Astrophysical Relevance