Nitrogen escape from Mars

Details Nitrogen escape from Mars Nitrogen escape from Mars

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992msat.work...53f&link_type=abstract

In Lunar and Planetary Inst., Workshop on the Martian Surface and Atmosphere Through Time p 53-54 (SEE N92-28988 19-91)

Other

Atmospheric Composition, Gas Dissociation, Gas Ionization, Ionic Reactions, Mars Atmosphere, Nitrogen, Nitrogen 15, Photodissociation, Photoionization, Mass Spectrometers, Molecular Interactions, Nitrogen Ions, Viking Spacecraft

Scientific paper

The mass spectrometer on the Viking spacecraft measured anomalous N-15:N-14 ratio of about 1.62 times the terrestrial value. This enhancement presumably results from differential escape of N-15. The escape of N is non-thermal and potential escape mechanisms include photodissociation, photoionization, and electron impact dissociative ionization of N2, and ion-molecule reactions and dissociative recombination of N2(+). The authors propose some calculations to explain the N ratio, but even with all escape mechanisms considered, the ratios don't balance. This leads to the assumption that some other escape mechanisms must exist that are unexplained.

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