The 21Ne production rate in stony meteorites estimated from 10Be and other radionuclides |
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Authors: | RK Moniot TH Kruse C Tuniz W Savin GS Hall T Milazzo D Pal GF Herzog |
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Institution: | Dept. Physics, Rutgers University USA;Dept. Physics, New Jersey Inst. Technology, Newark, NJ 07100 USA;Dept. Chemistry, Rutgers University, New Brunswick, NJ 08903 USA |
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Abstract: | The 10Be contents of 28 stony meteorites with known 21Ne contents range from 0.97 to 23 dpm/kg and give an average 21Ne production rate (P21) of (0.28 ± 0.02) × 108 cm3 STP/g-Myr for shielding conditions corresponding to in an H-chondrite. Our agrees with others' P21 based on 22Na, 81Kr and 53Mn but not on 26A1. Temporal variations in the cosmic ray flux do not explain the disagreement satisfactorily; major errors in the radionuclide half-lives are not indicated. The discrepancy seems rooted in the data selection and the difficulties of making accurate corrections for shielding, chemical composition and other sources of variability. |
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