University of Rome Carbon-14 Dates XIII

Abstract

This list includes the second group of age measurements made from September 1972 to July 1974 using the benzene scintillation method. All archaeologic and geologic samples come from Italian territory. Chemical apparatus for benzene synthesis and the liquid scintillation spectrometer are unchanged (Alessio et al, 1970a, 1973). Charcoal and wood samples underwent standard pretreatment by boiling with 5 to 10% HCl; α-labeled samples were given additional leaching with .2N NaOH. The counting rate of approx half the samples was corrected based on the 13C/12C ratio, mass-spectrometrically measured on CO2 obtained in combustion line set up after Broecker et al (1959), according to previously described procedure (Alessio et al, 1969).