Physics
Scientific paper
Nov 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987p%26ss...35.1471e&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 35, Nov. 1987, p. 1471-1474.
Physics
4
Doppler Effect, Electron Impact, Molecular Excitation, Nitrogen, Spectral Line Width, Atmospheric Radiation, Earth Atmosphere, Emission Spectra, Nitrogen Atoms, Upper Atmosphere
Scientific paper
It is found that the emission line-width of the N II (3p 3D-3d 3F0; 5005.15-A) line of ionized nitrogen is about 360 mA, when excited by 200-eV electron impact on N2. This result implies that an average ion fragment acquires a kinetic energy of about 8 eV in the dissociative excitation process and that about 8 percent of the energy of the incident 200-eV electron is converted directly into fragment kinetic energy. Such a large Doppler broadening would make it relatively easy for ground-based measurements to separate the relative contributions of direct excitation of atomic nitrogen and dissociative excitation of N2 to the source of this emission feature in the earth's upper atmosphere.
Erdman P. W.
Zipf Edward C.
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