Geological Survey of Canada Radiocarbon Dates XI

Abstract

During the past year, 1969-1970, both the 2-L (Dyck and Fyles, 1962) and 5-L (Dycket al., 1965) counters were routinely operated. A 1-L counter was finally constructed with acceptable characteristics (see description below) and was operated in July in place of the 5-L counter. The 2-L counter was operated exclusively at 2 atm. The 5-L counter was operated at 1 atm, except for October and November, 1969, when it was operated at 4 atm. The 1-L counter was operated at 1 atm.