Abstract
The 10Be activites in 21 diogenites vary from 17 to 27 dpm/kg. These variations can primarily be ascribed to shielding effects, as was deduced from their correlation with the 22Ne/ 21Ne ratio. The 10Be production rates in small diogenites are 10–30% higher than was predicted by a semi-empirical model based on the Knyahinya chondrite. This implies that 10Be is less shielding dependent than expected. Our first AMS measurements of 26Al in chondrites agree with earlier 26Al γ-ray results.
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