Cosmogenic 53 Mn in the main fragment of the Norton County aubrite

Details Cosmogenic 53 Mn in the main fragment of the Norton County aubrite Cosmogenic 53 Mn in the main fragment of the Norton County aubrite

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995gecoa..59..825e&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 59, Issue 4, pp.825-830

Physics

5

Scientific paper

Cosmogenic 53 Mn was determined for the first time in an aubrite, a very Fe-poor achondrite. Six samples of the main fragment of Norton County were selected near locations where preatmospheric depths of 11-21 cm had been determined from cosmic ray tracks. The measured 53 Mn activities ranged from 414 to 552 dpm/kg-Fe and increased rapidly with depth. Production rates of 53 Mn calculated with the LAHET Code System agree with the measured activities and show that the radius of Norton County (65 cm) was near that for maximum production rates. No special irradiation conditions are needed to explain cosmogenic nuclides in Norton County.

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