Low Background Counter for Carbon-14 Dating
Yuin-Chi Hsu, Chia-Yi Huang, Songyun Lin, Yi-Chuan Hsu, Muh-Chuen Chou, Shih-Chong Lu, Yuin-Kwei Tai · Chinese Journal of Physics · 1965
A proportional counting system for radiocarbon dating and precedures for producing carbon dioxide are described in this paper. The center counter was filled with carbon dioxide at one atmospheric pressure. The total background is 5.87f0.01 cpm. The value of 95% of the NBS contemporary standard for carbon-14 dating was taken as a standard of dating work.