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University of Pennsylvania Radiocarbon Dates XV

Published online by Cambridge University Press:  18 July 2016

Barbara Lawn
Barbara Lawn*
Affiliation:
Department of Physics and University Museum, University of Pennsylvania, Philadelphia, Pennsylvania 19104
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This date list includes most of the archaeologic and geologic samples dated in this laboratory since publication of our last date list (R., v. 12, p. 577–589), as well as some samples which had previously been dated, but lacked the sample information necessary for publication. Known-age samples, completed in this time period, will be reported elsewhere. The b.p. ages are based upon a.d. 1950, and have been calculated with the half-life value of 5568 yr. All samples were counted at least twice for periods of not less than 1000 minutes each. Errors quoted for each sample are derived from the measurement of the sample, the background, and of several counts of our mid-19th century standard oak sample, but do not include the half-life error. All samples were pretreated with 3N HCl, and some, where noted, were given additional pretreatment with 2% NaOH for the removal of possible humic acid contaminants.

Type
Research Article
Information
Radiocarbon , Volume 15 , Issue 2 , 1973 , pp. 367 - 381
Copyright
Copyright © The American Journal of Science 

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