Release of coprecipitated uranium from iron oxides |
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| Authors: | C. Noubactep A. Schöner H. Dienemann M. Sauter |
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| Affiliation: | (1) Radiation Science and Engineering Center, The Pennsylvania State University, University Park, PA 16802, USA;(2) The Malcolm and Carolyn Wiener Laboratory for Aegean and Near Eastern Dendrochronology, Cornell University, Ithaca, NY 14853, USA;(3) Cornell Institute for Biology Teachers, Cornell University, Ithaca, NY 14853, USA;(4) Radiation Science and Engineering Center, The Pennsylvania State University, University Park, PA 16802, USA |
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| Abstract: | Summary Gold concentration was determined for dendrochronologically-dated wood samples using neutron activation analysis (NAA) and correlation sought with known environmental changes, e.g., volcanic activities, during historic periods. Uptake of gold is sensitive to soil pH for many plants. Data presented in this paper are from a single, cross-dated tree that grew in Greece. Using NAA, gold was measured with parts-per-billion sensitivity in individual tree rings from 1411 to 1988 AD. |
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