Heavily irradiated grains and neon isotope anomalies in carbonaceous chondrites

Details Heavily irradiated grains and neon isotope anomalies in carbonaceous chondrites Heavily irradiated grains and neon isotope anomalies in carbonaceous chondrites

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...206l.185a&link_type=abstract

Astrophysical Journal, vol. 206, June 15, 1976, pt. 2, p. L185-L189.

Astronomy and Astrophysics

Astrophysics

16

Carbonaceous Chondrites, Irradiation, Meteoritic Composition, Neon Isotopes, Granular Materials, Ion Temperature, Minerals

Scientific paper

High-voltage microscope observations of micron-sized grains extracted from a fraction of the Orgueil meteorite rich in Ne-22 give strong experimental evidence for their heavy irradiation. It is suggested that the excess of Ne-22 measured in the same mineral separate can be explained by low-energy (less than 10 MeV) production by (p, alpha) reaction on Mg-25. A discussion of the astrophysical sites potentially responsible for the peculiar irradiation history of the meteoritic grains is presented.

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