Excess N-15 in the Martian atmosphere and cosmic rays in the early solar system

Details Excess N-15 in the Martian atmosphere and cosmic rays in the early solar system Excess N-15 in the Martian atmosphere and cosmic rays in the early solar system

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.274..234y&link_type=abstract

Nature, vol. 274, July 20, 1978, p. 234, 235.

Physics

1

Abundance, Cosmic Rays, Mars Atmosphere, Nitrogen 15, Solar System, Enrichment, Gamma Rays, Neon Isotopes, Nuclear Reactions, Oxygen Isotopes, Planetary Magnetic Fields, Viking Mars Program, Mars, Solar System, Nitrogen, Atmosphere, Cosmic Rays, Isotopic Ratios, Cosmic Ray Flux, Argon, Xenon

Scientific paper

Viking 1 and 2 observations of the Martian atmosphere have revealed an excess of N-15 over N-14 on the order of 3.5 x 10 to the 19th atoms/sq cm. Attention is given to a possible mechanism for the origin of the excess, i.e., cosmic rays from two of the eleven unidentified gamma ray sources reported by the COS B group, CG135+1 and CG189+1. The sources have been identified as belonging to the W3 star cluster, which is described as similar to the cluster out of which the solar system was born. Thus, intense gamma ray flux in the early solar system may account for the N-15 excess observed on Mars.

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