Cosmic-ray-produced36Cl and53Mn in Allan Hills-77 meteorites |
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| Authors: | K. Nishiizumi M.T. Murrell J.R. Arnold D. Elmore R.D. Ferraro H.E. Gove R.C. Finkel |
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| Affiliation: | Department of Chemistry, B-017, University of California at San Diego, La Jolla, CA 92093 U.S.A.;Nuclear Structure Research Laboratory, University of Rochester, Rochester, NY 14627 U.S.A.;Scripps Institution of Oceanography, S-002, University of California at San Diego, La Jolla, CA 92093 U.S.A. |
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| Abstract: | Cosmic-ray-produced53Mn (t1/2 = 3.7 × 106years) has been determined by neutron activation in nine Allan Hills-77 meteorites. Additionally,36Cl (1/2 = 3.0 × 105years) has been measured in seven of these objects using tandem accelerator mass spectrometry. These results, along with14C (t1/2 = 5740years) and26Al (7.2 × 105 years) concentrations determined elsewhere, yield terrestrial ages ranging from 0.1 × 105 to 7 × 105 years. Weathering was not found to result in53Mn loss. |
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