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UCLA Radiocarbon Dates XI

Published online by Cambridge University Press:  18 July 2016

Rainer Berger  and
Reiner Protsch
Rainer Berger
Affiliation:
Institute of Geophysics, Departments of Geography and Anthropology Interdisciplinary Archaeology Graduate Program University of California, Los Angeles, California 90024
Reiner Protsch
Affiliation:
Institute of Geophysics, Departments of Geography and Anthropology Interdisciplinary Archaeology Graduate Program University of California, Los Angeles, California 90024
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The radiocarbon dates reported in this list are almost all based on collagen measurements from human archaeologic bone material. This collagen was isolated according to the methods developed by Berger, Horney and Libby (1964), Ho, Marcus and Berger (1969), Longin (1971) and Protsch (1973). All samples were counted as CO2 gas at close to 1 atm in a 7.5L proportional counter with three energy channels. The 14C dates reported are calculated with the Libby half-life of 5568 ± 30 years as required by convention. 13C measurements were used to normalize to −25‰ in the standard manner. The biospheric standard is 95% the count rate of NBS oxalic acid for radiocarbon laboratories. Background is based on CO2 obtained from marble. The accuracy of counter operation is checked against historically dated wood from the funerary boat of Sesostris III, 1872−8 +4 bc (Hayes, 1962). The 14C ages are not tree-ring calibrated.

Information

Type
Date Lists
Information
Radiocarbon , Volume 31 , Issue 1 , 1989 , pp. 55 - 67
Copyright
Copyright © The American Journal of Science 

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