Physics
Scientific paper
Sep 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975p%26ss...23.1261p&link_type=abstract
Planetary and Space Science, vol. 23, Sept. 1975, p. 1261-1277. Research supported by the South African Council for Scientific a
Physics
7
D Region, Deionization, E Region, Ionic Reactions, Meteor Trails, Radio Meteors, Anions, Atmospheric Ionization, Electron Recombination, Night Sky, Oxygen
Scientific paper
The effect of known ionic reactions in the ionospheric D and E regions on the deionization of meteor trains is evaluated. It is shown that meteoric positive ions may be oxidized through a three-body reaction with molecular oxygen or a two-body reaction with ozone and that metal nitrides may also be formed through a three-body process. The subsequent rapid recombination of electrons with these oxide or nitride ions can result in significant deionization during the day or at night. It is found that true attachment and associated negative-ion processes may be important below about 80 km at night and that the reversal of this kind of ionization during the sunrise period could influence the detailed transition from night to daytime conditions. Observed changes in the integrated duration of radio echoes from Quadrantid shower meteors during the sunrise period are shown to confirm previously obtained theoretical attachment rates. Some quantitative conclusions are made about the maximum ionization of a fifth-magnitude meteor traveling at 40 km/sec through the D and E regions.
Nicholson F. T.
Poole M. G. L.
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