Tallinn Radiocarbon Dates II

Abstract

The following list includes samples dated in 1973. Benzene is used as the carrier of natural 14 C activity as previously described (Punning et al , 1973). We used both 1-channel and 2-channel scintillation devices. The detector shield comprises 10cm lead. Around the detector we put 16 Geiger-Mueller type counters in anticoincidence circuit with output signals from detector. It decreased the average background ca 20 to 40%.