THE NEW NAGOYA RADIOCARBON LABORATORY

A liquid scintillation counting apparatus that enables highly accurate measurements of C-14 has been constructed at the Solar-Terrestrial En vironment Laboratory, Nagoya University. The main aim of the project i s high precision year-by-year measurements of the 14C content in tree rings of an old cedar tree from Yaku Island, Japan. We present the res ults of C-14 measurements on tree rings from the Agematsu region for r ecent decades to confirm the validity of the system.