Ucla Radiocarbon Dates VII

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 CO 2 -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 C 14 and H 3 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 CO 2 obtained from marble. The error listed is always at least a 1σ statistical counting error. In critical cases C 13 /C 12 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 C 14 content at China Lake, California, will be published in the next date list

Accelerator mass spectrometry · Archaeology · Geography · Isotope · Isotopes of carbon · Isotopic ratio · Mineralogy · Nuclear physics · Physics · Radiocarbon dating · Radiochemistry · Radionuclide · Chemistry · Environmental Science · Geochemistry and Geologic Mapping · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Geology · Paleontology

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• The Middle Stone Age south of the Limpopo River

  Open Access•Anne I Thackeray, Anne Thackeray•Journal of World Prehistory•1992

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• British Museum Natural Radiocarbon Measurements VII

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• Instituto Venezolano De Investigaciones Cientificas Natural Radiocarbon Measurements IV

  Open Access•M A Tamers•Radiocarbon•1969

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• Ucla Radiocarbon Dates IX

  Rainer Berger, W F Libby•Radiocarbon•1969

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• The First 14 C Laboratory in Mexico

  Open Access•A Alcántara, C Solı́s et al.•Radiocarbon•2022

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• Ucla Radiocarbon Dates VIII

  Open Access•Rainer Berger, W F Libby•Radiocarbon•1968

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• A mid-Holocene AMS 14C date for the presumed upper Pleistocene human skeleton from Peers Cave, South Africa

  Open Access•Deano D Stynder, Fiona Brock et al.•Journal of Human Evolution•2009

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• On a new radiocarbon chronology for Africa south of the Equator

  Peter Beaumont, Peter B Beaumont et al.•African Studies•1972

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• Environment and subsistence of prehistoric man in the southern Cape Province, South Africa

  R G Klein•World Archaeology•1974

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• Ucla Radiocarbon Dates V

  Open Access•Rainer Berger, W F Libby•Radiocarbon•1966

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• Ucla Radiocarbon Dates VI

  Open Access•Rainer Berger, W F Libby•Radiocarbon•1967

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• Ucla Radiocarbon Dates IV

  Open Access•Rainer Berger, G J Fergusson et al.•Radiocarbon•1965

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• Saclay Natural Radiocarbon Measurements I

  Open Access•G Delibrias, M T Guillier et al.•Radiocarbon•1964

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• Ucla Radiocarbon Dates III

  Open Access•G J Fergusson, W F Libby•Radiocarbon•1964

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• The Ceramics of Huistla, a West Mexican Site in the Municipality of Etzatlán, Jalisco

  Open Access•Michael A Glassow•American Antiquity•1967

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