Electron temperature and electron density in the F-region of the ionosphere. II - The role of atomic oxygen and molecular nitrogen

Details Electron temperature and electron density in the F-region of the ionosphere. II - The role of atomic oxygen and molecular nitrogen Electron temperature and electron density in the F-region of the ionosphere. II - The role of atomic oxygen and molecular nitrogen

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jatp...49..873w&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 49, Sept. 1987, p. 873-887.

Physics

5

Electron Energy, F Region, Ionospheric Electron Density, Nitrogen, Oxygen Atoms, Coulomb Collisions, Energy Transfer, Molecular Gases, Nitrogen Ions, Oxygen Ions

Scientific paper

Atomic oxygen and molecular nitrogen play several important roles in the processes that control the thermal balance of the electron population near the F-region peak. Both O and N2 are ionized by EUV radiation and produce photoelectrons. Ion exchange with N2 contributes to the recombination of O(+) and in this way controls the equilibrium electron density. In the transfer of photoelectron energy to thermal electrons competition arises from ionization and excitation of oxygen and nitrogen. Finally, of the processes by which thermal electrons lose energy, the three most important are Coulomb collision with ionized oxygen, excitation of the fine-structure states of neutral oxygen, and vibrational cooling by molecular nitrogen. A simple model expresses all these processes and accurately describes the observed relationship between electron temperature, electron density, and solar flux.

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