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UCLA Radiocarbon Dates VII∗

Published online by Cambridge University Press:  18 July 2016

Rainer Berger  and
W. F. Libby
Rainer Berger
Affiliation:
Institute of Geophysics, University of California, Los Angeles 90024
W. F. Libby
Affiliation:
Institute of Geophysics, University of California, Los Angeles 90024
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The measurements reported have been carried out during the first half of 1967 in the Isotope Laboratory of the Institute of Geophysics and Planetary Physics as a continuation of the UCLA date lists I through VI. Samples were analyzed as CO2-gas at close to one atm in a 7.5 L proportional counter with 3 energy channels described earlier. Radiocarbon ages have been calculated for uniformity on the basis of a 5568-yr half-life as was recommended by the Sixth International C14 and H3 Dating Conference, June 1965, in Pullman, Washington. The standard for the contemporary biosphere remains as 95% of the count rate of NBS oxalic acid for radiocarbon laboratories. Background determinations have been based on CO2 obtained from marble. The error listed is always at least a 1σ statistical counting error. In critical cases C13/C12 isotope ratio measurements were made to correct the dates for fractionation. All samples were subjected to accepted NaOH and/or HCl pretreatments depending on the individual case as a minimum to exclude contamination. The annual curve for the atmospheric C14 content at China Lake, California, will be published in the next date list.

Type
Research Article
Information
Radiocarbon , Volume 10 , Issue 1 , 1968 , pp. 149 - 160
Copyright
Copyright © The American Journal of Science 

References

Date lists Google Scholar
Michigan II Crane, and Griffin, , 1958 Google Scholar
Saclay I Delibrias, , Guillier, , and Labeyrie, , 1964 Google Scholar
UCLA III Fergusson, and Libby, , 1964 Google Scholar
UCLA IV Berger, , Fergusson, , and Libby, , 1965 Google Scholar
UCLA V Berger, and Libby, , 1966 Google Scholar
UCLA VI Berger, and Libby, , 1967 Google Scholar
Berger, R., Graham, J. A., and Heizer, R. F., 1967, A reconsideration of the age of the Radiocarbon, v. 7, p. 336–371. La Venta site: Contributions of the Archaeological Research Facility, No. 3, Univ. of Calif. at Berkeley, p. 1–24.Google Scholar
Berger, R., Horney, A. G. and Libby, W. F., 1964, Radiocarbon dating of bone and shell from their organic components: Science, v. 144, p. 999–1001.Google Scholar
Berger, R. and Libby, W. F., 1966, UCLA radiocarbon dates V: Radiocarbon, v. 8, p. 467–497.CrossRefGoogle Scholar
Berger, R. and Libby, W. F. 1967, UCLA radiocarbon dates VI: Radiocarbon, v. 9, p. 477–504.Google Scholar
Coe, M. D., Diehl, R. A., and Stuiver, M., 1967, Olmec Civilization, Veracruz, Mexico: Dating of the San Lorenzo Phase: Science, v. 155, p. 1399–1401.CrossRefGoogle ScholarPubMed
Crane, H. R. and Griffin, J. B., 1958, Univ. of Michigan radiocarbon dates II: Science, v. 127, p. 1098–1105.Google Scholar
Delibrias, G., Guillier, M. T. and Labeyrie, J., 1964, Saclay natural radiocarbon measurements I: Radiocarbon, v. 6, p. 233–250.Google Scholar
Fergusson, G. J. and Libby, W. F., 1962, UCLA radiocarbon dates III: Radiocarbon, v. 6, p. 318–339.Google Scholar
Glassow, M. A., 1967, The ceramics of Huistla, a west Mexican site in the municipality of Etzatlan, Jalisco: Amer. Antiquity, v. 32, p. 64–83.CrossRefGoogle Scholar
Grant, C., 1967, The rock art of the American Indian: T. Y. Crowell, New York.Google Scholar
Hewitt, C. A. 1967, The history of structural carpentry in Essex: Cambridge Univ. Press, in press.Google Scholar
Miller, Sheryl F., 1967, Analysis and description of artifact assemblages attributed to the Nachikufan Industry of Zambia: Ph.D. dissertation, Univ. of Calif. at Berkeley.Google Scholar
Suess, H. E., 1965, Secular variations of the cosmic-ray-produced carbon-14 in the atmosphere and their interpretations: Jour. Geophys. Res., v. 70, p. 5937–5952.CrossRefGoogle Scholar
Taylor, R. E. and Berger, R., 1967, Radiocarbon content of marine shells from the Pacific coasts of Central and South America: Science, v. 158, p. 1180–1182.Google Scholar