Rocket observation of the N II 2143 A emission in an aurora

Details Rocket observation of the N II 2143 A emission in an aurora Rocket observation of the N II 2143 A emission in an aurora

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987georl..14..479s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 14, April 1987, p. 479-482.

Physics

Atomic Physics

10

Auroral Spectroscopy, Nitrogen Ions, Rocket Sounding, Ultraviolet Spectra, Electron Impact, Quenching (Atomic Physics), Vertical Distribution

Scientific paper

Using a rocket-mounted spectrometer with a multichannel detector, the existence of the N II 2143 A doublet in the auroral ultraviolet spectrum was confirmed. The measured intensity is in agreement with previous auroral observations and is consistent with a peak electron-impact cross section of 1-2 x 10 to the -18th sq cm. By comparing an altitude profile of the 2143 A emission to the N2(+) 3914 A emission, a deactivation rate for the N(+)(5S) state was obtained. The most likely quencher is N2, although the possibility of a reaction with O2 cannot be ruled out. For N2, the deduced value of the quenching coefficient equals 5.5 x 10 to the -10th cu cm/s.

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