Cosmogenic production profiles in the Mbale chondrite

Details Cosmogenic production profiles in the Mbale chondrite Cosmogenic production profiles in the Mbale chondrite

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994metic..29q.519p&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 29, no. 4, p. 519

Astronomy and Astrophysics

Astronomy

2

Astronomical Models, Chondrites, Cosmology, Radioactive Isotopes, Meteoroid Showers, Shielding, Solar Cycles, Spectroscopy

Scientific paper

Eleven samples of the Mbale meteorite shower (August 4, 1992) have been analyzed for the cosmogenic radionuclides Al-26, Co-57,60, Mn-54, and Na-22 by Ge-gamma-spectrometry. According to their Co-60 activity as a depth/size indicator, they cover a shielding depth range from nearly below the surface to the center of an R greater than or equal to 30 cm meteoroid. The thus obtained production rate profiles are compared to existing model calculations. The influence of solar cycle variation and the deviation from a spherical geometry are discussed. Correlation of shielding depth and location in the shower fall area is investigated. Earlier measurements of shorter-living cosmogenic nuclides in the same meteorite allow us to extend the investigated systematics to these nuclides also.

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