• Radiocarbon – Price List

      Department of Geosciences, The University of Arizona, 1992-01-01
    • Radiocarbon, Volume 34, Number 1 (1992)

      Department of Geosciences, The University of Arizona, 1992-01-01
    • Rehovot Radiocarbon Measurements IV

      Carmi, Israel; Segal, Dror (Department of Geosciences, The University of Arizona, 1992-01-01)
      The following list consists of dates of archaeological samples, obtained by gas-proportional counting of ethane, between 1985 and the end of 1991. During this time a close cooperation has been established with the Israel Antiquities Authority, which now has an archaeologist (D.S.) participating in the operation of the lab and serving as a liaison officer with the archaeological community.
    • Rudjer Bošković Institute Radiocarbon Measurements XII

      Srdoč, Dušan; Horvatinčić, Nada; Krajcar Bronić, Ines; Obelić, Bogomil; Sliepčević, Adela (Department of Geosciences, The University of Arizona, 1992-01-01)
      We present here radiocarbon analyses made since our previous list (Srdoč et al. 1989). Sample pretreatment, combustion and counting techniques are essentially the same as described previously (Srdoč, Breyer & Sliepčević 1971), supplemented by new techniques for groundwater processing (Srdoč et al. 1979). The calculation of ages follows conventional protocol (Stuiver & Polach 1977). These ages can be converted from the 5570-year half-life to the chronometrically more correct half-life of 5730 years by multiplying by the factor, 1.029. Ages and standard deviations of all samples are adjusted for stable isotope fractionation according to the recommendations in Stuiver and Polach (1977), except for groundwater, calcareous deposits and aquatic plants. The delta-13C values of the latter reflect the environmental conditions during their formation or growth rather than fractionation (Mook 1976; Krajcar Bronić et al. 1986; Marčenko et al. 1989). Thus, any percent modern (pMC) correction based on delta-13C values is meaningless or even misleading. Sample descriptions are prepared in collaboration with collectors and submitters. Calibrated ages were calculated using the program of Stuiver and Reimer (1987).
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      Department of Geosciences, The University of Arizona, 1992-01-01
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      Department of Geosciences, The University of Arizona, 1992-01-01
    • University of Granada Radiocarbon Dates VI

      Gonzalez-Gomez, Cecilio (Department of Geosciences, The University of Arizona, 1992-01-01)
      This paper includes determinations of archaeological, geological, palaeobotanical and other samples from Spain, Portugal and Bolivia, measured at the University of Granada Radiocarbon Dating Laboratory, mostly from 1989 to 1990. Pretreatment of charcoal and wood samples is a standard acid-basic procedure using 8% HCl and 2% NaOH at boiling temperature. We obtain collagen from bone samples using the Longin (1971) method.
    • University of Wisconsin Radiocarbon Dates XXVII

      Prior, Christine A.; Phelps, Lori F. (Department of Geosciences, The University of Arizona, 1992-01-01)
      Procedures and equipment used in the University of Wisconsin laboratory have been described previously (Bender, Bryson & Baerreis 1965; Steventon & Kutzbach 1986). Except as otherwise indicated, wood, charcoal and peat samples are pretreated with dilute NaOH-Na4P2O7 and dilute HCl before conversion to counting gas methane; when noted, marls and lake cores are treated with acid only.