Hostname: page-component-848d4c4894-ndmmz Total loading time: 0 Render date: 2024-05-24T04:23:50.313Z Has data issue: false hasContentIssue false
  • English
  • Français

Instituto Venezolano de Investigaciones Cientificas Natural Radiocarbon Measurements VI

Published online by Cambridge University Press:  18 July 2016

M. A. Tamers
M. A. Tamers*
Affiliation:
Instituto Venezolano de Investigaciones Científicas, Department of Chemistry, Caracas, Venezuela
Rights & Permissions [Opens in a new window]

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The I.V.I.C. laboratory continues operation using liquid scintillation spectrometry with synthesized benzene. A plastic-glass counting vessel contains 3 ml benzene, 1 ml commercial toluene, and concentrations of 0.4% PPO and 0.01% POPOP as scintillators. Background is 6.9 cpm and activity of the modern standard, 95% of the activity of the NBS oxalic acid, is 21.4 cpm. In the age calculations, 5568 years is taken for the half-life of C14 and quoted errors are one standard deviation arising from the random nature of the radioactive disintegration process. Uncertainties in the half-life are not included nor are variations in the deposition rate of stratospheric radiocarbon and dilution by industrial use of fossil fuels. A.D. 1950 is employed as the reference year in the B.P. (before present) notation of ages.

Type
Research Article
Information
Radiocarbon , Volume 13 , Issue 1 , 1971 , pp. 32 - 44
Copyright
Copyright © The American Journal of Science 

References

Benzler, J. H. and Geyh, M. A., 1966, Versuch einer zeitlichen Gliederung von Dwog-Horizonten mit Hinweisen auf die Problematik der 14C-Datierung von Bodenproben: Deutsch geol. Gesell. Zeitschr., v. 118, p. 361–367.Google Scholar
Buckley, J. D. and Willis, E. H., 1969, Isotopes' radiocarbon measurements VII: Radiocarbon, v. 11, p. 53–105.CrossRefGoogle Scholar
Cruxent, José M., 1967, El paleo-indio en Taima-taima, estado Falcón, Venezuela: Acta Cient. Venezolana Supp. 3, p. 3–17.Google Scholar
Goel, P. S. and Kohman, T. P., 1962, Cosmogenic carbon-14 in meteorites and terrestrial ages of “finds” and craters: Science, v. 136, p. 875–876.CrossRefGoogle ScholarPubMed
Scharpenseel, H. W. and Pietig, F., 1969, Altersbestimmung von Böden durch die Radiokohlenstoffdatierungsmethode III. Böden mit Bt-Horizont und fossile Schwarzerden: Pflanzenernährung Bodenkunde Zeitschr., v. 122, p. 145–152.Google Scholar
Scharpenseel, H. W., Tamers, M. A., and Pietig, F., 1968, Altersbestimmung von Böden durch die Radiokohlenstoffdatierungsmethode. I. Methode und vorhandene 14C-Daten: Pflanzenernährung Bodenkunde Zeitschr., v. 119, p. 34–44.CrossRefGoogle Scholar
Schubert, Carlos and Sifontes, R. S., 1970, Bocono Fault, Venezuelan Andes: Evidence of Postglacial movement: Science, v. 170, p. 66–69.Google ScholarPubMed
Stuiver, Minze, 1969, Yale natural radiocarbon measurements IX: Radiocarbon v. 11, p. 545–658.CrossRefGoogle Scholar
Suess, H. E. and Wänke, H., 1962, Radiocarbon content and terrestrial age of twelve stony meteorites and one iron meteorite: Geochim. et Cosmochim. Acta, v. 26, 475–480.CrossRefGoogle Scholar
Tamers, M. A., 1963, Détermination des sections éfficaces de quelques réactions nucléaires intervenant dans les effets du rayonnement cosmique: C.E.A. Rap., v. 2298, p. 1–61.Google Scholar
Tamers, M. A., 1966, Instituto Venezolano de Investigaciones Científicas natural radiocarbon measurements II: Radiocarbon, v. 8, p. 204–212.CrossRefGoogle Scholar
Tamers, M. A., 1969a, Instituto Venezolano de Investigaciones Científicas natural radiocarbon measurements IV: Radiocarbon, v. 11, p. 396–422.CrossRefGoogle Scholar
Tamers, M. A., 1969b, Datage non destructif des os fossiles: Acad. sci. [Paris] Comptes rendus, v. 268D, p. 489–492.Google Scholar
Tamers, M. A., 1970, Instituto Venezolano de Investigaciones Científicas natural radiocarbon measurements V: Radiocarbon, v. 12, p. 509–525.CrossRefGoogle Scholar
Tamers, M. A. and Scharpenseel, H. W., 1970, Sequential sampling of radiocarbon in ground water, in: Use of isotopes in hydrology, I.A.E.A., Vienna, in press.Google Scholar
Vaz, J. E., 1970, Mineralogia y composicion química del meteorito “Caserio Ucera”: Acta Cient. Venezolana, in press.Google Scholar
Wagner, Erika, 1967, The prehistory and ethnohistory of the Carache area in western Venezuela: Yale Univ. pub. in Anthropol., no. 71.Google Scholar