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Title:
The isotopic composition of solar flare noble gases
Authors:
Black, D. C.
Affiliation:
AA(NASA, Ames Research Center, Space Science Div., Moffett Field, CA)
Publication:
Astrophysical Journal, Part 1, vol. 266, Mar. 15, 1983, p. 889-894. (ApJ Homepage)
Publication Date:
03/1983
Category:
Solar Physics
Origin:
STI
NASA/STI Keywords:
Abundance, Lunar Composition, Meteoritic Composition, Neon Isotopes, Solar Flares, Evolution (Development), Explorer 50 Satellite, International Sun Earth Explorer 3, Lunar Rocks, Rare Gases, Solar System, Solar Wind
DOI:
10.1086/160836
Bibliographic Code:
1983ApJ...266..889B

Abstract

The relative elemental and isotopic abundances of noble gases provide insights into a number of topics related to the solar system. Neon is in many ways the most diagnostic of the noble gases. The diagnostic character is mainly related to the variation in the relative abundance of the two most abundant neon isotopes, Ne-20 and Ne-22. The available evidence suggests that trapped neon found in meteorites and in lunar samples consists of as many as five isotopically distinct components, including neon A, B, C, D, and E. Neon B has been shown to be due to solar wind neon which has been directly implanted into the material found in a meteorite. It appears that neon E is extrasolar in origin. There exist ambiguities regarding the origins of the remaining three components. The present investigation is concerned with a reexamination of the existing data in an effort to eliminate or at least clarify these ambiguities. It is found that neon C is apparently due to directly implanted, low-energy solar flare neon nuclei.

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