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High resolution daytime photoelectron energy spectra from AE‐E
Author(s) -
Doering J. P.,
Peterson W. K.,
Bostrom C. O.,
Potemra T. A.
Publication year - 1976
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl003i003p00129
Subject(s) - photoionization , daytime , spectral line , atomic physics , physics , x ray photoelectron spectroscopy , electron spectrometer , spectrometer , electron , excitation , atmospheric sciences , ionization , optics , nuclear magnetic resonance , astronomy , ion , nuclear physics , quantum mechanics , cathode ray
The daytime photoelectron energy spectrum has been measured at altitudes above 154 km by the photoelectron spectrometer experiment on the Atmosphere Explorer‐E satellite. Much higher energy resolution spectra than previous AE‐C results have been obtained. Below 200 km, well resolved peaks are observed in the spectrum corresponding to production of O + and N 2 + in various electronic states from photoionization of N 2 and O by solar He II (304A) radiation. Vibration‐rotation excitation of N 2 by inelastic electron scattering is observed at 2.5 eV. The features due to nitrogen disappear from the spectrum at altitudes above 200 km.