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Russian Journal of Physical Chemistry B

, Volume 6, Issue 1, pp 112–127 | Cite as

Microwave radiation in the upper atmosphere of the earth during strong geomagnetic disturbances

  • G. V. Golubkov
  • M. G. Golubkov
  • M. I. Manzhelii
Effect of External Factors on Physicochemical Transformations

Abstract

The influence of N2 and O2 molecules on spontaneous microwave radiation spectrum was studied over the decimeter range. This radiation appears in the D and E upper earth atmosphere layers during strong magnetic storms. It was shown to be caused by radiation transitions between medium-perturbed orbitally degenerate Rydberg atom and molecule states A** that occur without changes in the principal quantum number, δn = 0. The available experimental data were used to calculate the dependences of orbitally degenerate state populations on the density of medium and electron flux and temperature. Effective radiation bands were constructed for transitions between highly excited quasi-molecule levels A**N2 and A**O2. The emission spectrum was shown to be inhomogeneous and contain three frequency regions in which a noticeable decrease in the intensity of radiation occurred. The physical reason for the formation of these regions was a shift of the emission spectra of quasi-molecules containing unexcited N2 and O2 molecules. The frequency profiles of radiation intensity within these frequency regions were calculated as depending on the storm level. Radiation profiles were shown to noticeably change as the storm level increased, they strongly increased close to the right region edge corresponding to high transition frequencies. Nonmonotonic behavior of this profile in the middle of the lower region was observed; this was related to emission spectrum inhomogeneity. A sharp increase in radiation intensity as the magnetic storm level increased occurred in the region of frequencies situated close to the right edge of the upper region (50–100 GHz), which was most interesting for biophysical studies of the action of microwave radiation on living organisms during strong geomagnetic disturbances.

Keywords

high-excitation states of atoms and molecules D and E layers of the upper atmosphere of the Earth neutral medium particles l mixing nonequilibrium two-temperature plasma microwave radiation 

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Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  • G. V. Golubkov
    • 1
  • M. G. Golubkov
    • 1
  • M. I. Manzhelii
    • 1
  1. 1.Semenov Institute of Chemical PhysicsRussian Academy of SciencesMoscowRussia

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