Beryllium-10 contents of core samples from the St. Severin meteorite |
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| Authors: | C Tuniz CM Smith RK Moniot TH Kruse W Savin DK Pal GF Herzog RC Reedy |
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| Institution: | Depts. Physics and Chemistry, Rutgers, The State Univ., New Brunswick, NJ 08903 USA;Max-Planck-Institut für Chemie, D6500 Mainz, Fed. Rep. Germany |
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| Abstract: | Eleven samples taken from along the 35-cm core AIII of the LL-chondrite St. Severin have 10Be contents ranging from 20 to 28 dpm/kg and averaging 24.5 ± 0.9 dpm/kg. The 10Be contents increase with depth in the outermost 8 cm while at depths greater than 8 cm the 10Be contents change little. Calculations based on cross sections for proton-induced reactions that make 10Be disagree seriously with the measured values. Relatively large cross sections were constructed for neutron-induced reactions below 1 GeV. They give calculated 10Be production rates that agree with the measured values to within 10%. Cosmogenic 10Be in stony meteorites is better described as a medium-energy product than as a high-energy one. |
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