Inversion of cosmogenic-nuclide data from iron meteorites

Details Inversion of cosmogenic-nuclide data from iron meteorites Inversion of cosmogenic-nuclide data from iron meteorites

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990cajph..68.1312p&link_type=abstract

Canadian Journal of Physics (ISSN 0008-4204), vol. 68, Nov. 1990, p. 1312-1321.

Physics

Cosmic Rays, Cosmochemistry, Iron Meteorites, Meteoritic Composition, Astronomical Models, Chronology, Least Squares Method, Nuclides, Spallation, Transmutation

Scientific paper

This paper demonstrates that there exist elegant inversion techniques with which one can obtain, simultaneously, the prehistory of the cosmic-ray flux within iron meteorites and the exposure ages of the meteorites. The preferred estimate of the present cosmic-ray flux leads to ages less than previous values by 10 to 20 percent, however the uncertainty in the present flux is too large to say that this difference is significant. Lowering the values taken for the present flux increases the calculated ages, but needs a more dramatic change of flux over the past ten to the ninth years. It is shown how to calculate a qualitative estimate for the ultimate resolving power methods such as these.

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