University of Rome Carbon-14 Dates XIV

Abstract

This list includes dates measured from January 1974 to June 1975 with previously described CO2 proportional counters (Alessio et al, 1970b). All archaeologic and geologic samples except for Arslantepe series come from Italian territory. Chemical apparatus for CO2 preparation and purification is unchanged (Alessio et al, 1970b). Data recording devices have recently been replaced with integrated circuits built entirely at the Lab. The logic of the circuitry was also modified to provide more stable devices and a higher relative figure of merit A/√B of each counter (A = net activity of modern standard, B = background). Consequently, the resolution of age measurements has increased appreciably. Present values of A/√B for the 4 counters in use are shown in Table 1.