The cosmic ray produced He-3/Ne-21 ratio in ultramafic rocks

Details The cosmic ray produced He-3/Ne-21 ratio in ultramafic rocks The cosmic ray produced He-3/Ne-21 ratio in ultramafic rocks

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.1075s&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 11, p. 1075-1078.

Physics

8

Cosmic Rays, Helium Isotopes, Meteoritic Composition, Neon Isotopes, Olivine, Lava, Mass Spectroscopy, Rocks

Scientific paper

The cosmic ray-generated He-3/Ne-21 ratio in ultramafic rocks based on 16 individual analyses is 3.5 +/- 0.1. The good agreement between samples from the Darinanga lava field and samples from Reunion Island, as well as the present noble-gas mass spectrometer determinations of He and Ne sensitivities, inspire confidence in this isotope-ratio value. An Ne-21(c) production rate of 1.06 x 10 exp -18 cu cm (STP) at Hawaii sea level is inferred.

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