V. A. Sreckovic

Rydberg atoms in astrophysics

Elementary processes in astrophysical phenomena traditionally attract researchers attention. At first this can be attributed to a group of chemi-ionization processes in Rydberg atom collisions with ground state parent atoms. This processes might be studied as a prototype of the elementary process of the radiation energy transformation into electrical one. The studies of nonlinear mechanics have shown that so called regime of dynamic chaos should be considered as typical, rather than exceptional situation in Rydberg atoms collision. From comparison of theory with experimental results it follows that a such kind of stochastic dynamic processes, occurred during the single collision, may be observed.

Chemi-ionization in Solar Photosphere: Influence on the Hydrogen Atom Excited States Population

In this paper, the influence of chemi-ionization processes in H*(n ≥ 2) + H(1s) collisions, as well as the influence of inverse chemi-recombination processes on hydrogen atom excited-state populations in solar photosphere, are compared with the influence of concurrent electron-atom and electron-ion ionization and recombination processes. It has been found that the considered chemi-ionization/recombination processes dominate over the relevant concurrent processes in almost the whole solar photosphere. Thus, it is shown that these processes and their importance for the non-local thermodynamic equilibrium modeling of the solar atmosphere should be investigated further.

Absorption non-symmetric ion–atom processes in helium-rich white dwarf atmospheres

In this work the processes of absorption charge-exchange and photo-association in He+H

Modeling of continuous absorption of electromagnetic radiation in dense partially ionized plasmas

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Modeling of the Continuous Absorption of Electromagnetic Radiation in Dense Hydrogen Plasma

collisions together with the process of ion HeH

The dynamic conductivity of strongly non-ideal plasmas: is the Drude model valid?

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MOL-D: A Collisional Database and Web Service within the Virtual Atomic and Molecular Data Center

photo-dissociation are considered as factors of influence on the opacity of the atmospheres of helium-rich white dwarfs in the far UV and EUV region. It is shown that they should be taken into account even in the cases of the atmospheres of white dwarfs with H:He =

Excitation and deexcitation processes in atom-Rydberg atom collisions in helium-rich white dwarf atmospheres

10^{-5}

The quasi-molecular absorption bands in UV region caused by the non-symmetric ion-atom radiative processes in the solar photosphere

. Than, it is established that in the cases of white dwarfs with H:He

The Influence of Chemi-Ionization and Recombination Processes on Spectral Line Shapes in Stellar Atmospheres

\gtrsim 10^{-4}