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Wright State University

1983

Mars

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Full-Text Articles in Physics

Nitrogen Escape From Mars, Jane L. Fox, Alexander Dalgarno Jan 1983

Nitrogen Escape From Mars, Jane L. Fox, Alexander Dalgarno

Physics Faculty Publications

The escape rate of nitrogen from Mars is calculated to be 2.3×105 s−1 for low solar flux conditions and 8.9×105 s−1 for high solar flux conditions. The major source of energetic atoms is dissociative recombination of ground state and vibrationally excited N2+ ions. The measured 15N/14N isotope ratio can be reproduced by postulating an early dense atmosphere during which little differentiation occurred.